Thermal decomposition of formates. Part VIII. Thermal dehydration of Dy(III), Ho(III), Er(III), Tm(III), Yb(III) and Lu(III) formate dihydrates
Identifieur interne : 004558 ( Main/Exploration ); précédent : 004557; suivant : 004559Thermal decomposition of formates. Part VIII. Thermal dehydration of Dy(III), Ho(III), Er(III), Tm(III), Yb(III) and Lu(III) formate dihydrates
Auteurs : Yoshio Masuda [Japon]Source :
- Thermochimica Acta [ 0040-6031 ] ; 1983.
Descripteurs français
- Wicri :
- topic : Déshydratation.
English descriptors
- KwdEn :
- Acta, Activation energy, Calcd, Chem, Dehydration, Dehydration reaction, Differential scanning calorimetry, Dihydrates, Elemental analysis, Enthalpy change, Exothermic peak, First transition metal formate dihydrates, Formate, Formate dihydrates, Formates, Frequency factor, Heating rate, Isothermal, Masuda, Other hand, Peak temperature, Phase reaction, Previous paper, Publishing company, Rare earth formate dihydrates, Rare earth metal formate dihydrates, Rare earth metal oxide, Reaction order, Rigaku thermoflex, Thermal dehydration, Thermochim, Weight loss.
- Teeft :
- Acta, Activation energy, Calcd, Chem, Dehydration, Dehydration reaction, Differential scanning calorimetry, Dihydrates, Elemental analysis, Enthalpy change, Exothermic peak, First transition metal formate dihydrates, Formate, Formate dihydrates, Formates, Frequency factor, Heating rate, Isothermal, Masuda, Other hand, Peak temperature, Phase reaction, Previous paper, Publishing company, Rare earth formate dihydrates, Rare earth metal formate dihydrates, Rare earth metal oxide, Reaction order, Rigaku thermoflex, Thermal dehydration, Thermochim, Weight loss.
Abstract
Abstract: The thermal dehydration of some rare earth metal formate dihydrates were studied by means of thermogravimetry, differential thermal analysis and differential scanning calorimetry.The dehydration took place successively as a one step reaction for all of the formate dihydrates examined. The reaction order of dehydration was found to be 23 for all of the salts examined, which indicated that the rate of dehydration was controlled by a chemical process at a phase boundary.The values of the activation energy, frequency factor and the enthalpy change of dehydration for all of the dihydrates were 108–142 kJ mole−1, 1016–1017 min−1 and 109–147 kJ mole−1, respectively.Both the temperature at which the dehydration occurred and the enthalpy change increased as the reciprocal of the radius of the metallic ion increased.
Url:
DOI: 10.1016/0040-6031(83)80271-8
Affiliations:
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Part VIII. Thermal dehydration of Dy(III), Ho(III), Er(III), Tm(III), Yb(III) and Lu(III) formate dihydrates</title><author><name sortKey="Masuda, Yoshio" sort="Masuda, Yoshio" uniqKey="Masuda Y" first="Yoshio" last="Masuda">Yoshio Masuda</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>General Education Department, Niigata University</wicri:regionArea><wicri:noRegion>Niigata University</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Thermochimica Acta</title><title level="j" type="abbrev">TCA</title><idno type="ISSN">0040-6031</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1983">1983</date><biblScope unit="volume">60</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="203">203</biblScope><biblScope unit="page" to="210">210</biblScope></imprint><idno type="ISSN">0040-6031</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0040-6031</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acta</term><term>Activation energy</term><term>Calcd</term><term>Chem</term><term>Dehydration</term><term>Dehydration reaction</term><term>Differential scanning calorimetry</term><term>Dihydrates</term><term>Elemental analysis</term><term>Enthalpy change</term><term>Exothermic peak</term><term>First transition metal formate dihydrates</term><term>Formate</term><term>Formate dihydrates</term><term>Formates</term><term>Frequency factor</term><term>Heating rate</term><term>Isothermal</term><term>Masuda</term><term>Other hand</term><term>Peak temperature</term><term>Phase reaction</term><term>Previous paper</term><term>Publishing company</term><term>Rare earth formate dihydrates</term><term>Rare earth metal formate dihydrates</term><term>Rare earth metal oxide</term><term>Reaction order</term><term>Rigaku thermoflex</term><term>Thermal dehydration</term><term>Thermochim</term><term>Weight loss</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Acta</term><term>Activation energy</term><term>Calcd</term><term>Chem</term><term>Dehydration</term><term>Dehydration reaction</term><term>Differential scanning calorimetry</term><term>Dihydrates</term><term>Elemental analysis</term><term>Enthalpy change</term><term>Exothermic peak</term><term>First transition metal formate dihydrates</term><term>Formate</term><term>Formate dihydrates</term><term>Formates</term><term>Frequency factor</term><term>Heating rate</term><term>Isothermal</term><term>Masuda</term><term>Other hand</term><term>Peak temperature</term><term>Phase reaction</term><term>Previous paper</term><term>Publishing company</term><term>Rare earth formate dihydrates</term><term>Rare earth metal formate dihydrates</term><term>Rare earth metal oxide</term><term>Reaction order</term><term>Rigaku thermoflex</term><term>Thermal dehydration</term><term>Thermochim</term><term>Weight loss</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Déshydratation</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: The thermal dehydration of some rare earth metal formate dihydrates were studied by means of thermogravimetry, differential thermal analysis and differential scanning calorimetry.The dehydration took place successively as a one step reaction for all of the formate dihydrates examined. The reaction order of dehydration was found to be 23 for all of the salts examined, which indicated that the rate of dehydration was controlled by a chemical process at a phase boundary.The values of the activation energy, frequency factor and the enthalpy change of dehydration for all of the dihydrates were 108–142 kJ mole−1, 1016–1017 min−1 and 109–147 kJ mole−1, respectively.Both the temperature at which the dehydration occurred and the enthalpy change increased as the reciprocal of the radius of the metallic ion increased.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><country name="Japon"><noRegion><name sortKey="Masuda, Yoshio" sort="Masuda, Yoshio" uniqKey="Masuda Y" first="Yoshio" last="Masuda">Yoshio Masuda</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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