Thermal and optical properties of Tm3+ doped tellurite glasses
Identifieur interne : 000A10 ( Istex/Corpus ); précédent : 000A09; suivant : 000A11Thermal and optical properties of Tm3+ doped tellurite glasses
Auteurs : G. Özen ; B. Demirata ; M. L. Öveço Lu ; A. GençSource :
- Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [ 1386-1425 ] ; 2001.
English descriptors
- KwdEn :
- Absorption bands, Acta, Aldrich chemical company, Compositional dependence, Crystalline phase, Crystallization, Crystallization temperatures, Doped, Doped glasses, Doped tellurite glasses, Elsevier science, Equatorial position, Exothermic peak, Glass composition, Glass formation, Glass technol, Glass transition, Glass transition temperature, Ground level, Ground state, Ground state absorption bands, Heating rate, Infrared region, Infrared wavelength region, Laser hosts, Licl, Licl content, Matrix elements, Metastable levels, Molar ratio, Optical and thermal properties, Optical properties, Oscillator, Oscillator strength, Oscillator strengths, Oxide glasses, Ozen, Phonon energies, Radiative lifetime, Room temperature, Spectrochimica, Spectrochimica acta part, Tellurite, Tellurite glass, Tellurite glasses, Teo2, Thermal properties, Thulium.
- Teeft :
- Absorption bands, Acta, Aldrich chemical company, Compositional dependence, Crystalline phase, Crystallization, Crystallization temperatures, Doped, Doped glasses, Doped tellurite glasses, Elsevier science, Equatorial position, Exothermic peak, Glass composition, Glass formation, Glass technol, Glass transition, Glass transition temperature, Ground level, Ground state, Ground state absorption bands, Heating rate, Infrared region, Infrared wavelength region, Laser hosts, Licl, Licl content, Matrix elements, Metastable levels, Molar ratio, Optical properties, Oscillator, Oscillator strength, Oscillator strengths, Oxide glasses, Ozen, Phonon energies, Radiative lifetime, Room temperature, Spectrochimica, Spectrochimica acta part, Tellurite, Tellurite glasses, Teo2, Thermal properties.
Abstract
Abstract: Ultraviolet, visible (UV/VIS) and differential thermal analysis (DTA) measurements were carried out in order to investigate the optical and thermal properties of various 0.5 mol.% Tm2O3 containing (1−x)TeO2+xLiCl glasses in molar ratio. The samples were prepared by fusing the mixture of their respective reagent grade powders in a platinum cricuble at 750°C for 30 min. DTA curves taken in the 23–600°C temperature range with a heating rate of 10°C/min reveal a change in the value of the glass transition temperature, Tg, while melting was not observed for the glasses containing LiCl content less than 50 mol.%. These glasses were found to be moisture-resistant. However, the glasses with LiCl content higher than 50 mol.%, in which a melting peak was observed at Tc=401°C, were moisture-sensitive. Absorption measurements in the UV/VIS region of the glasses without Tm2O3 content show that the Urbach cutoff occurs at about 320 nm and, is relatively independent of the LiCl content. Six absorption bands were observed in the Tm2O3 doped glasses corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of Tm3+ ions. The spectra also show that the integrated absorption cross-section of each band depends on the glass composition. Judd-Ofelt theory was used to determine the Judd-Ofelt parameters as well as the radiative transition probabilities for the metastable levels of Tm3+ ions in (0.3)LiCl+(0.7) TeO2: 0.01 Tm2O3 glass which is moisture-resistant.
Url:
DOI: 10.1016/S1386-1425(00)00392-9
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ISTEX:2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1Le document en format XML
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The samples were prepared by fusing the mixture of their respective reagent grade powders in a platinum cricuble at 750°C for 30 min. DTA curves taken in the 23–600°C temperature range with a heating rate of 10°C/min reveal a change in the value of the glass transition temperature, Tg, while melting was not observed for the glasses containing LiCl content less than 50 mol.%. These glasses were found to be moisture-resistant. However, the glasses with LiCl content higher than 50 mol.%, in which a melting peak was observed at Tc=401°C, were moisture-sensitive. Absorption measurements in the UV/VIS region of the glasses without Tm2O3 content show that the Urbach cutoff occurs at about 320 nm and, is relatively independent of the LiCl content. Six absorption bands were observed in the Tm2O3 doped glasses corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of Tm3+ ions. The spectra also show that the integrated absorption cross-section of each band depends on the glass composition. Judd-Ofelt theory was used to determine the Judd-Ofelt parameters as well as the radiative transition probabilities for the metastable levels of Tm3+ ions in (0.3)LiCl+(0.7) TeO2: 0.01 Tm2O3 glass which is moisture-resistant.</div></front></TEI><istex><corpusName>elsevier</corpusName><keywords><teeft><json:string>licl</json:string><json:string>tellurite</json:string><json:string>licl content</json:string><json:string>teo2</json:string><json:string>ozen</json:string><json:string>acta</json:string><json:string>spectrochimica</json:string><json:string>spectrochimica acta part</json:string><json:string>glass transition</json:string><json:string>glass composition</json:string><json:string>absorption bands</json:string><json:string>tellurite glasses</json:string><json:string>thermal properties</json:string><json:string>oscillator strengths</json:string><json:string>doped</json:string><json:string>oscillator</json:string><json:string>room temperature</json:string><json:string>heating rate</json:string><json:string>oxide glasses</json:string><json:string>glass transition temperature</json:string><json:string>crystallization temperatures</json:string><json:string>doped tellurite glasses</json:string><json:string>oscillator strength</json:string><json:string>ground state</json:string><json:string>compositional dependence</json:string><json:string>crystallization</json:string><json:string>glass formation</json:string><json:string>aldrich chemical company</json:string><json:string>molar ratio</json:string><json:string>metastable levels</json:string><json:string>optical properties</json:string><json:string>elsevier science</json:string><json:string>exothermic peak</json:string><json:string>crystalline phase</json:string><json:string>infrared region</json:string><json:string>ground state absorption bands</json:string><json:string>glass technol</json:string><json:string>doped glasses</json:string><json:string>phonon energies</json:string><json:string>infrared wavelength region</json:string><json:string>ground level</json:string><json:string>equatorial position</json:string><json:string>matrix elements</json:string><json:string>radiative lifetime</json:string><json:string>laser hosts</json:string></teeft></keywords><author><json:item><name>G. Özen</name><affiliations><json:string>E-mail: gozenl@itu.edu.tr</json:string><json:string>Faculty of Science and Letters, Department of Physics, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</json:string></affiliations></json:item><json:item><name>B. Demirata</name><affiliations><json:string>Faculty of Science and Letters, Department of Chemistry, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</json:string></affiliations></json:item><json:item><name>M.L. Öveçoğlu</name><affiliations><json:string>Faculty of Chemistry and Metallurgy, Department of Metallurgical and Materials Engineering, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</json:string></affiliations></json:item><json:item><name>A. Genç</name><affiliations><json:string>Faculty of Chemistry and Metallurgy, Department of Metallurgical and Materials Engineering, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Tellurite glass</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Thulium</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Optical and thermal properties</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>Ultraviolet, visible (UV/VIS) and differential thermal analysis (DTA) measurements were carried out in order to investigate the optical and thermal properties of various 0.5 mol.% Tm2O3 containing (1−x)TeO2+xLiCl glasses in molar ratio. The samples were prepared by fusing the mixture of their respective reagent grade powders in a platinum cricuble at 750°C for 30 min. DTA curves taken in the 23–600°C temperature range with a heating rate of 10°C/min reveal a change in the value of the glass transition temperature, Tg, while melting was not observed for the glasses containing LiCl content less than 50 mol.%. These glasses were found to be moisture-resistant. However, the glasses with LiCl content higher than 50 mol.%, in which a melting peak was observed at Tc=401°C, were moisture-sensitive. Absorption measurements in the UV/VIS region of the glasses without Tm2O3 content show that the Urbach cutoff occurs at about 320 nm and, is relatively independent of the LiCl content. Six absorption bands were observed in the Tm2O3 doped glasses corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of Tm3+ ions. The spectra also show that the integrated absorption cross-section of each band depends on the glass composition. Judd-Ofelt theory was used to determine the Judd-Ofelt parameters as well as the radiative transition probabilities for the metastable levels of Tm3+ ions in (0.3)LiCl+(0.7) TeO2: 0.01 Tm2O3 glass which is moisture-resistant.</abstract><qualityIndicators><score>5.827</score><pdfVersion>1.2</pdfVersion><pdfPageSize>526 x 662 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>3</keywordCount><abstractCharCount>1509</abstractCharCount><pdfWordCount>2995</pdfWordCount><pdfCharCount>17862</pdfCharCount><pdfPageCount>8</pdfPageCount><abstractWordCount>236</abstractWordCount></qualityIndicators><title>Thermal and optical properties of Tm3+ doped tellurite glasses</title><pii><json:string>S1386-1425(00)00392-9</json:string></pii><genre><json:string>research-article</json:string></genre><host><title>Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy</title><language><json:string>unknown</json:string></language><publicationDate>2001</publicationDate><issn><json:string>1386-1425</json:string></issn><pii><json:string>S1386-1425(00)X0054-6</json:string></pii><volume>57</volume><issue>2</issue><pages><first>273</first><last>280</last></pages><genre><json:string>journal</json:string></genre></host><categories><wos><json:string>science</json:string><json:string>spectroscopy</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>physics & astronomy</json:string><json:string>chemical physics</json:string></scienceMetrix><inist><json:string>sciences appliquees, technologies et medecines</json:string><json:string>sciences biologiques et medicales</json:string><json:string>sciences biologiques fondamentales et appliquees. psychologie</json:string><json:string>vertebres: anatomie et physiologie, organisme dans son ensemble ou etude de plusieurs organes ou systemes</json:string></inist></categories><publicationDate>2001</publicationDate><copyrightDate>2001</copyrightDate><doi><json:string>10.1016/S1386-1425(00)00392-9</json:string></doi><id>2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Thermal and optical properties of Tm3+ doped tellurite glasses</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©2001 Elsevier Science B.V.</p></availability><date>2001</date></publicationStmt><notesStmt><note type="content">Fig. 1: DTA curves of (1−x) TeO2+(x)LiCl glasses with x=30,40,50,60,70 mol.%. All the glasses contain 0.5 mol.% Tm2O3. The curves were obtained with a heating rate 10°C/min. Tg and Tc are the glass transition and the crystallization temperatures, respectively.</note><note type="content">Fig. 2: Variation of the glass transition temperature, Tg, with LiCl content.</note><note type="content">Fig. 3: Absorption specrtum of 70TeO2+30LiCl glass doped with 1 mol.%Tm2O3 in the visible and near infrared wavelength region.</note><note type="content">Fig. 4: (a) Compositional dependence of the Tm3+ absorption bands in the visible wavelength region; (b) Compositional dependence of the Tm3+ absorption bands in the near infrared wavelength region.</note><note type="content">Table 1: Values of glass transition, Tg, crystallization, Tc, and melting, Tm, temperatures of the (1−x)TeO2+xLiCl glasses with x=30, 40, 50, 60 and 70 mol.%</note><note type="content">Table 2: Compositional dependence of integrated absorption cross-section of Tm3+ ground state absorption bands (c is the Tm3+ concentration per cm3 and, l is the thickness of the sample)</note><note type="content">Table 3: Measured and calculated oscillator strengths of Tm3+ in 0.3LiCl+0.7TeO2 glassa</note><note type="content">Table 4: Calculated spontaneous emission probabilities, Aed, radiative lifetimes, τR, and the branching ratios, β, for Tm3+ in 0.3LiCl+0.7TeO2 glass</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Thermal and optical properties of Tm3+ doped tellurite glasses</title><author xml:id="author-0000"><persName><forename type="first">G.</forename><surname>Özen</surname></persName><email>gozenl@itu.edu.tr</email><note type="correspondence"><p>Corresponding author. Tel.: +90-212-2853206; fax: +90-212-2856386</p></note><affiliation>Faculty of Science and Letters, Department of Physics, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</affiliation></author><author xml:id="author-0001"><persName><forename type="first">B.</forename><surname>Demirata</surname></persName><affiliation>Faculty of Science and Letters, Department of Chemistry, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</affiliation></author><author xml:id="author-0002"><persName><forename type="first">M.L.</forename><surname>Öveçoğlu</surname></persName><affiliation>Faculty of Chemistry and Metallurgy, Department of Metallurgical and Materials Engineering, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</affiliation></author><author xml:id="author-0003"><persName><forename type="first">A.</forename><surname>Genç</surname></persName><affiliation>Faculty of Chemistry and Metallurgy, Department of Metallurgical and Materials Engineering, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</affiliation></author><idno type="istex">2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1</idno><idno type="DOI">10.1016/S1386-1425(00)00392-9</idno><idno type="PII">S1386-1425(00)00392-9</idno></analytic><monogr><title level="j">Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy</title><title level="j" type="abbrev">SAA</title><idno type="pISSN">1386-1425</idno><idno type="PII">S1386-1425(00)X0054-6</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2001"></date><biblScope unit="volume">57</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="273">273</biblScope><biblScope unit="page" to="280">280</biblScope></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2001</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Ultraviolet, visible (UV/VIS) and differential thermal analysis (DTA) measurements were carried out in order to investigate the optical and thermal properties of various 0.5 mol.% Tm2O3 containing (1−x)TeO2+xLiCl glasses in molar ratio. The samples were prepared by fusing the mixture of their respective reagent grade powders in a platinum cricuble at 750°C for 30 min. DTA curves taken in the 23–600°C temperature range with a heating rate of 10°C/min reveal a change in the value of the glass transition temperature, Tg, while melting was not observed for the glasses containing LiCl content less than 50 mol.%. These glasses were found to be moisture-resistant. However, the glasses with LiCl content higher than 50 mol.%, in which a melting peak was observed at Tc=401°C, were moisture-sensitive. Absorption measurements in the UV/VIS region of the glasses without Tm2O3 content show that the Urbach cutoff occurs at about 320 nm and, is relatively independent of the LiCl content. Six absorption bands were observed in the Tm2O3 doped glasses corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of Tm3+ ions. The spectra also show that the integrated absorption cross-section of each band depends on the glass composition. Judd-Ofelt theory was used to determine the Judd-Ofelt parameters as well as the radiative transition probabilities for the metastable levels of Tm3+ ions in (0.3)LiCl+(0.7) TeO2: 0.01 Tm2O3 glass which is moisture-resistant.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Tellurite glass</term></item><item><term>Thulium</term></item><item><term>Optical and thermal properties</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2001">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="gr1"></istex:entity><istex:entity SYSTEM="gr2" NDATA="IMAGE" name="gr2"></istex:entity><istex:entity SYSTEM="gr3" NDATA="IMAGE" name="gr3"></istex:entity><istex:entity SYSTEM="gr4a" NDATA="IMAGE" name="gr4a"></istex:entity><istex:entity SYSTEM="gr4b" NDATA="IMAGE" name="gr4b"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>SAA</jid><aid>2966</aid><ce:pii>S1386-1425(00)00392-9</ce:pii><ce:doi>10.1016/S1386-1425(00)00392-9</ce:doi><ce:copyright type="full-transfer" year="2001">Elsevier Science B.V.</ce:copyright></item-info><head><ce:title>Thermal and optical properties of Tm<ce:sup>3+</ce:sup> doped tellurite glasses</ce:title><ce:author-group><ce:author><ce:given-name>G.</ce:given-name><ce:surname>Özen</ce:surname><ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup></ce:cross-ref><ce:cross-ref refid="CORR1">*</ce:cross-ref><ce:e-address>gozenl@itu.edu.tr</ce:e-address></ce:author><ce:author><ce:given-name>B.</ce:given-name><ce:surname>Demirata</ce:surname><ce:cross-ref refid="AFF2"><ce:sup>b</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>M.L.</ce:given-name><ce:surname>Öveçoğlu</ce:surname><ce:cross-ref refid="AFF3"><ce:sup>c</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>A.</ce:given-name><ce:surname>Genç</ce:surname><ce:cross-ref refid="AFF3"><ce:sup>c</ce:sup></ce:cross-ref></ce:author><ce:affiliation id="AFF1"><ce:label>a</ce:label><ce:textfn>Faculty of Science and Letters, Department of Physics, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</ce:textfn></ce:affiliation><ce:affiliation id="AFF2"><ce:label>b</ce:label><ce:textfn>Faculty of Science and Letters, Department of Chemistry, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</ce:textfn></ce:affiliation><ce:affiliation id="AFF3"><ce:label>c</ce:label><ce:textfn>Faculty of Chemistry and Metallurgy, Department of Metallurgical and Materials Engineering, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</ce:textfn></ce:affiliation><ce:correspondence id="CORR1"><ce:label>*</ce:label><ce:text>Corresponding author. Tel.: +90-212-2853206; fax: +90-212-2856386</ce:text></ce:correspondence></ce:author-group><ce:date-received day="22" month="6" year="2000"></ce:date-received><ce:date-accepted day="5" month="8" year="2000"></ce:date-accepted><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>Ultraviolet, visible (UV/VIS) and differential thermal analysis (DTA) measurements were carried out in order to investigate the optical and thermal properties of various 0.5 mol.% Tm<ce:inf>2</ce:inf>O<ce:inf>3</ce:inf> containing (1−<ce:italic>x</ce:italic>)TeO<ce:inf>2</ce:inf>+<ce:italic>x</ce:italic>LiCl glasses in molar ratio. The samples were prepared by fusing the mixture of their respective reagent grade powders in a platinum cricuble at 750°C for 30 min. DTA curves taken in the 23–600°C temperature range with a heating rate of 10°C/min reveal a change in the value of the glass transition temperature, <ce:italic>T</ce:italic><ce:inf>g</ce:inf>, while melting was not observed for the glasses containing LiCl content less than 50 mol.%. These glasses were found to be moisture-resistant. However, the glasses with LiCl content higher than 50 mol.%, in which a melting peak was observed at <ce:italic>T</ce:italic><ce:inf>c</ce:inf>=401°C, were moisture-sensitive. Absorption measurements in the UV/VIS region of the glasses without Tm<ce:inf>2</ce:inf>O<ce:inf>3</ce:inf> content show that the Urbach cutoff occurs at about 320 nm and, is relatively independent of the LiCl content. Six absorption bands were observed in the Tm<ce:inf>2</ce:inf>O<ce:inf>3</ce:inf> doped glasses corresponding to the absorption of the <ce:sup loc="pre">1</ce:sup>G<ce:inf>4</ce:inf>, <ce:sup loc="pre">3</ce:sup>F<ce:inf>2</ce:inf>, <ce:sup loc="pre">3</ce:sup>F<ce:inf>3</ce:inf> and <ce:sup loc="pre">3</ce:sup>F<ce:inf>4</ce:inf>, <ce:sup loc="pre">3</ce:sup>H<ce:inf>5</ce:inf> and <ce:sup loc="pre">3</ce:sup>H<ce:inf>4</ce:inf> levels from the <ce:sup loc="pre">3</ce:sup>H<ce:inf>6</ce:inf> ground level of Tm<ce:sup>3+</ce:sup> ions. The spectra also show that the integrated absorption cross-section of each band depends on the glass composition. Judd-Ofelt theory was used to determine the Judd-Ofelt parameters as well as the radiative transition probabilities for the metastable levels of Tm<ce:sup>3+</ce:sup> ions in (0.3)LiCl+(0.7) TeO<ce:inf>2</ce:inf>: 0.01 Tm<ce:inf>2</ce:inf>O<ce:inf>3</ce:inf> glass which is moisture-resistant.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Tellurite glass</ce:text></ce:keyword><ce:keyword><ce:text>Thulium</ce:text></ce:keyword><ce:keyword><ce:text>Optical and thermal properties</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Thermal and optical properties of Tm3+ doped tellurite glasses</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Thermal and optical properties of Tm</title></titleInfo><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Özen</namePart><affiliation>E-mail: gozenl@itu.edu.tr</affiliation><affiliation>Faculty of Science and Letters, Department of Physics, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</affiliation><description>Corresponding author. Tel.: +90-212-2853206; fax: +90-212-2856386</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B.</namePart><namePart type="family">Demirata</namePart><affiliation>Faculty of Science and Letters, Department of Chemistry, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.L.</namePart><namePart type="family">Öveçoğlu</namePart><affiliation>Faculty of Chemistry and Metallurgy, Department of Metallurgical and Materials Engineering, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Genç</namePart><affiliation>Faculty of Chemistry and Metallurgy, Department of Metallurgical and Materials Engineering, Istanbul Technical University, 80626, Maslak, Istanbul, Turkey</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-1JC4F85T-7">research-article</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">2001</dateIssued><copyrightDate encoding="w3cdtf">2001</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><abstract lang="en">Abstract: Ultraviolet, visible (UV/VIS) and differential thermal analysis (DTA) measurements were carried out in order to investigate the optical and thermal properties of various 0.5 mol.% Tm2O3 containing (1−x)TeO2+xLiCl glasses in molar ratio. The samples were prepared by fusing the mixture of their respective reagent grade powders in a platinum cricuble at 750°C for 30 min. DTA curves taken in the 23–600°C temperature range with a heating rate of 10°C/min reveal a change in the value of the glass transition temperature, Tg, while melting was not observed for the glasses containing LiCl content less than 50 mol.%. These glasses were found to be moisture-resistant. However, the glasses with LiCl content higher than 50 mol.%, in which a melting peak was observed at Tc=401°C, were moisture-sensitive. Absorption measurements in the UV/VIS region of the glasses without Tm2O3 content show that the Urbach cutoff occurs at about 320 nm and, is relatively independent of the LiCl content. Six absorption bands were observed in the Tm2O3 doped glasses corresponding to the absorption of the 1G4, 3F2, 3F3 and 3F4, 3H5 and 3H4 levels from the 3H6 ground level of Tm3+ ions. The spectra also show that the integrated absorption cross-section of each band depends on the glass composition. Judd-Ofelt theory was used to determine the Judd-Ofelt parameters as well as the radiative transition probabilities for the metastable levels of Tm3+ ions in (0.3)LiCl+(0.7) TeO2: 0.01 Tm2O3 glass which is moisture-resistant.</abstract><note type="content">Fig. 1: DTA curves of (1−x) TeO2+(x)LiCl glasses with x=30,40,50,60,70 mol.%. All the glasses contain 0.5 mol.% Tm2O3. The curves were obtained with a heating rate 10°C/min. Tg and Tc are the glass transition and the crystallization temperatures, respectively.</note><note type="content">Fig. 2: Variation of the glass transition temperature, Tg, with LiCl content.</note><note type="content">Fig. 3: Absorption specrtum of 70TeO2+30LiCl glass doped with 1 mol.%Tm2O3 in the visible and near infrared wavelength region.</note><note type="content">Fig. 4: (a) Compositional dependence of the Tm3+ absorption bands in the visible wavelength region; (b) Compositional dependence of the Tm3+ absorption bands in the near infrared wavelength region.</note><note type="content">Table 1: Values of glass transition, Tg, crystallization, Tc, and melting, Tm, temperatures of the (1−x)TeO2+xLiCl glasses with x=30, 40, 50, 60 and 70 mol.%</note><note type="content">Table 2: Compositional dependence of integrated absorption cross-section of Tm3+ ground state absorption bands (c is the Tm3+ concentration per cm3 and, l is the thickness of the sample)</note><note type="content">Table 3: Measured and calculated oscillator strengths of Tm3+ in 0.3LiCl+0.7TeO2 glassa</note><note type="content">Table 4: Calculated spontaneous emission probabilities, Aed, radiative lifetimes, τR, and the branching ratios, β, for Tm3+ in 0.3LiCl+0.7TeO2 glass</note><subject lang="en"><genre>Keywords</genre><topic>Tellurite glass</topic><topic>Thulium</topic><topic>Optical and thermal properties</topic></subject><relatedItem type="host"><titleInfo><title>Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy</title></titleInfo><titleInfo type="abbreviated"><title>SAA</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">200102</dateIssued></originInfo><identifier type="ISSN">1386-1425</identifier><identifier type="PII">S1386-1425(00)X0054-6</identifier><part><date>200102</date><detail type="volume"><number>57</number><caption>vol.</caption></detail><detail type="issue"><number>2</number><caption>no.</caption></detail><extent unit="issue-pages"><start>209</start><end>396</end></extent><extent unit="pages"><start>273</start><end>280</end></extent></part></relatedItem><identifier type="istex">2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1</identifier><identifier type="ark">ark:/67375/6H6-D8T6RNK9-G</identifier><identifier type="DOI">10.1016/S1386-1425(00)00392-9</identifier><identifier type="PII">S1386-1425(00)00392-9</identifier><accessCondition type="use and reproduction" contentType="copyright">©2001 Elsevier Science B.V.</accessCondition><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-HKKZVM7B-M">elsevier</recordContentSource><recordOrigin>Elsevier Science B.V., ©2001</recordOrigin></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/2DC925E378C53D2B4D3EE10FFE36E8ADB8A363C1/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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