Study of proton conduction in thulium-doped barium zirconates at high temperatures
Identifieur interne : 000E96 ( Pascal/Curation ); précédent : 000E95; suivant : 000E97Study of proton conduction in thulium-doped barium zirconates at high temperatures
Auteurs : Mouloud Laidoudi [Malaisie] ; IBRAHIM ABU TALIB [Malaisie] ; Ramli Omar [Malaisie]Source :
- Journal of physics. D, Applied physics : (Print) [ 0022-3727 ] ; 2000.
Descripteurs français
- Pascal (Inist)
- Conductivité ionique, Conductivité protonique, Matériau dopé, Addition thulium, Force électromotrice, Méthode électrochimique, Non stoechiométrie, Atmosphère contrôlée, Impédance électrique, Concentration impureté, Energie activation, Equation Arrhenius, Dépendance température, Perovskites, Baryum Zirconate, Etude expérimentale, 6630H, Composé ternaire, BaZrO3:Tm, Ba O Zr.
English descriptors
- KwdEn :
- Activation energy, Arrhenius equation, Barium Zirconates, Controlled atmospheres, Doped materials, Electric impedance, Electrochemical method, Electromotive force, Experimental study, Impurity density, Ionic conductivity, Nonstoichiometry, Perovskites, Proton conductivity, Temperature dependence, Ternary compounds, Thulium additions.
Abstract
The specimens of BaZr1-xTmxO3-α (x = 0.02, 0.05, 0.10 and 0.15, α = x/2) have been prepared and characterized. The formation of the single perovskite phase in the samples was checked by x-ray diffraction. For the verification of the possible charge carriers in the sintered BaZr1-xTmxO3-α samples, three different electrochemical cell measurements were carried out. The measurements of electromotive force (emf) of hydrogen and steam concentration cells showed that the BaZr1-xTmxO3-α ceramic is a protonic conductor and the measurements of emf of the oxygen concentration cell showed that the BaZr0.90Tm0.10O3-α sample exhibited poor oxide ion conduction. Proton transport number tH was calculated and was found to be dependent on the content, x. The BaZr0.90Tm0.10O3-α sample showed the highest value of proton transport number in the temperature range 500 ≤ T < 900°C.
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<author><name sortKey="Laidoudi, Mouloud" sort="Laidoudi, Mouloud" uniqKey="Laidoudi M" first="Mouloud" last="Laidoudi">Mouloud Laidoudi</name>
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<author><name sortKey="Ibrahim Abu Talib" sort="Ibrahim Abu Talib" uniqKey="Ibrahim Abu Talib" last="Ibrahim Abu Talib">IBRAHIM ABU TALIB</name>
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<author><name sortKey="Omar, Ramli" sort="Omar, Ramli" uniqKey="Omar R" first="Ramli" last="Omar">Ramli Omar</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Study of proton conduction in thulium-doped barium zirconates at high temperatures</title>
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<author><name sortKey="Omar, Ramli" sort="Omar, Ramli" uniqKey="Omar R" first="Ramli" last="Omar">Ramli Omar</name>
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<series><title level="j" type="main">Journal of physics. D, Applied physics : (Print)</title>
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<idno type="ISSN">0022-3727</idno>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term>
<term>Arrhenius equation</term>
<term>Barium Zirconates</term>
<term>Controlled atmospheres</term>
<term>Doped materials</term>
<term>Electric impedance</term>
<term>Electrochemical method</term>
<term>Electromotive force</term>
<term>Experimental study</term>
<term>Impurity density</term>
<term>Ionic conductivity</term>
<term>Nonstoichiometry</term>
<term>Perovskites</term>
<term>Proton conductivity</term>
<term>Temperature dependence</term>
<term>Ternary compounds</term>
<term>Thulium additions</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Conductivité ionique</term>
<term>Conductivité protonique</term>
<term>Matériau dopé</term>
<term>Addition thulium</term>
<term>Force électromotrice</term>
<term>Méthode électrochimique</term>
<term>Non stoechiométrie</term>
<term>Atmosphère contrôlée</term>
<term>Impédance électrique</term>
<term>Concentration impureté</term>
<term>Energie activation</term>
<term>Equation Arrhenius</term>
<term>Dépendance température</term>
<term>Perovskites</term>
<term>Baryum Zirconate</term>
<term>Etude expérimentale</term>
<term>6630H</term>
<term>Composé ternaire</term>
<term>BaZrO3:Tm</term>
<term>Ba O Zr</term>
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<front><div type="abstract" xml:lang="en">The specimens of BaZr<sub>1-x</sub>
Tm<sub>x</sub>
O<sub>3-α</sub>
(x = 0.02, 0.05, 0.10 and 0.15, α = x/2) have been prepared and characterized. The formation of the single perovskite phase in the samples was checked by x-ray diffraction. For the verification of the possible charge carriers in the sintered BaZr<sub>1-x</sub>
Tm<sub>x</sub>
O<sub>3-α</sub>
samples, three different electrochemical cell measurements were carried out. The measurements of electromotive force (emf) of hydrogen and steam concentration cells showed that the BaZr<sub>1-x</sub>
Tm<sub>x</sub>
O<sub>3-α</sub>
ceramic is a protonic conductor and the measurements of emf of the oxygen concentration cell showed that the BaZr<sub>0.90</sub>
Tm<sub>0.10</sub>
O<sub>3-α</sub>
sample exhibited poor oxide ion conduction. Proton transport number t<sub>H</sub>
was calculated and was found to be dependent on the content, x. The BaZr<sub>0.90</sub>
Tm<sub>0.10</sub>
O<sub>3-α</sub>
sample showed the highest value of proton transport number in the temperature range 500 ≤ T < 900°C.</div>
</front>
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</fA05>
<fA06><s2>23</s2>
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<fA08 i1="01" i2="1" l="ENG"><s1>Study of proton conduction in thulium-doped barium zirconates at high temperatures</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>LAIDOUDI (Mouloud)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>IBRAHIM ABU TALIB</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>OMAR (Ramli)</s1>
</fA11>
<fA14 i1="01"><s1>School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia</s1>
<s2>43600 Bangi</s2>
<s3>MYS</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
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<fA20><s1>3112-3120</s1>
</fA20>
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</fA21>
<fA23 i1="01"><s0>ENG</s0>
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<fA44><s0>0000</s0>
<s1>© 2001 INIST-CNRS. All rights reserved.</s1>
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<fA47 i1="01" i2="1"><s0>01-0027414</s0>
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<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
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<fA64 i1="01" i2="1"><s0>Journal of physics. D, Applied physics : (Print)</s0>
</fA64>
<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>The specimens of BaZr<sub>1-x</sub>
Tm<sub>x</sub>
O<sub>3-α</sub>
(x = 0.02, 0.05, 0.10 and 0.15, α = x/2) have been prepared and characterized. The formation of the single perovskite phase in the samples was checked by x-ray diffraction. For the verification of the possible charge carriers in the sintered BaZr<sub>1-x</sub>
Tm<sub>x</sub>
O<sub>3-α</sub>
samples, three different electrochemical cell measurements were carried out. The measurements of electromotive force (emf) of hydrogen and steam concentration cells showed that the BaZr<sub>1-x</sub>
Tm<sub>x</sub>
O<sub>3-α</sub>
ceramic is a protonic conductor and the measurements of emf of the oxygen concentration cell showed that the BaZr<sub>0.90</sub>
Tm<sub>0.10</sub>
O<sub>3-α</sub>
sample exhibited poor oxide ion conduction. Proton transport number t<sub>H</sub>
was calculated and was found to be dependent on the content, x. The BaZr<sub>0.90</sub>
Tm<sub>0.10</sub>
O<sub>3-α</sub>
sample showed the highest value of proton transport number in the temperature range 500 ≤ T < 900°C.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B60F30H</s0>
</fC02>
<fC03 i1="01" i2="3" l="FRE"><s0>Conductivité ionique</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG"><s0>Ionic conductivity</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Conductivité protonique</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Proton conductivity</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Conductividad protónica</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Matériau dopé</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Doped materials</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Addition thulium</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>Thulium additions</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Force électromotrice</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Electromotive force</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Méthode électrochimique</s0>
<s5>07</s5>
</fC03>
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<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Método electroquímico</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Non stoechiométrie</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Nonstoichiometry</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Atmosphère contrôlée</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Controlled atmospheres</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Impédance électrique</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Electric impedance</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Concentration impureté</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Impurity density</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Concentración impureza</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Energie activation</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Activation energy</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Equation Arrhenius</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Arrhenius equation</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Dépendance température</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Temperature dependence</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Perovskites</s0>
<s5>16</s5>
</fC03>
<fC03 i1="14" i2="3" l="ENG"><s0>Perovskites</s0>
<s5>16</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>Baryum Zirconate</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>17</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG"><s0>Barium Zirconates</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>17</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>Etude expérimentale</s0>
<s5>18</s5>
</fC03>
<fC03 i1="16" i2="3" l="ENG"><s0>Experimental study</s0>
<s5>18</s5>
</fC03>
<fC03 i1="17" i2="3" l="FRE"><s0>6630H</s0>
<s2>PAC</s2>
<s4>INC</s4>
<s5>56</s5>
</fC03>
<fC03 i1="18" i2="3" l="FRE"><s0>Composé ternaire</s0>
<s5>83</s5>
</fC03>
<fC03 i1="18" i2="3" l="ENG"><s0>Ternary compounds</s0>
<s5>83</s5>
</fC03>
<fC03 i1="19" i2="3" l="FRE"><s0>BaZrO3:Tm</s0>
<s4>INC</s4>
<s5>92</s5>
</fC03>
<fC03 i1="20" i2="3" l="FRE"><s0>Ba O Zr</s0>
<s4>INC</s4>
<s5>93</s5>
</fC03>
<fC07 i1="01" i2="3" l="FRE"><s0>Composé minéral</s0>
<s5>81</s5>
</fC07>
<fC07 i1="01" i2="3" l="ENG"><s0>Inorganic compounds</s0>
<s5>81</s5>
</fC07>
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<s5>82</s5>
</fC07>
<fC07 i1="02" i2="3" l="ENG"><s0>Transition element compounds</s0>
<s5>82</s5>
</fC07>
<fN21><s1>015</s1>
</fN21>
</pA>
</standard>
</inist>
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