Heat capacity, entropy, oxygen non-stoichiometry and magnetic properties of cobalt sillenite Bi24Co2O39-delta
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F15%3A43900098" target="_blank" >RIV/60461373:22310/15:43900098 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0040603115003858" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0040603115003858</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tca.2015.09.019" target="_blank" >10.1016/j.tca.2015.09.019</a>
Alternative languages
Result language
angličtina
Original language name
Heat capacity, entropy, oxygen non-stoichiometry and magnetic properties of cobalt sillenite Bi24Co2O39-delta
Original language description
We synthesized the cobalt sillenite with overall stoichiometry Bi24Co2O39-delta using conventional ceramic route and characterized it in detail. XRD and EDS were used to determine phase purity and Rietveld refinement was applied to determine lattice parameters. Relaxation time calorimetry and DSC were used to measure low temperature heat capacity and to evaluate the molar entropy. Low temperature heat capacity was then analyzed by a combination of Einstein and Debye model. Thermal stability and oxygen non-stoichiometry were analyzed using STA. Drop experiments were performed to evaluate the dependence of high-temperature heat capacity. Magnetic properties were studied by vibrating sample magnetometry. The obtained results were applied to re-assess thethermodynamic model of sillenite phase and the ternary Bi-Co-O phase diagram. This knowledge is essential for the construction of the entire Bi-Sr-Co-O phase diagram involving ternary phases with outstanding thermoelectric properties.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA13-17538S" target="_blank" >GA13-17538S: Oxide Thermoelectric Materials for High Temperature Waste Heat Recovery</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Thermochimica Acta
ISSN
0040-6031
e-ISSN
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Volume of the periodical
619
Issue of the periodical within the volume
NOV 10 2015
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
6
Pages from-to
26-31
UT code for WoS article
000363824000005
EID of the result in the Scopus database
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