Heat Capacity, Enthalpy and Entropy of Bismuth Strontium Niobate and Bismuth Strontium Tantalate

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F06%3A00017674" target="_blank" >RIV/60461373:22310/06:00017674 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Heat Capacity, Enthalpy and Entropy of Bismuth Strontium Niobate and Bismuth Strontium Tantalate
Original language description
The heat capacities and enthalpy increments of strontium bismuth niobate SrBi2Nb2O9 (SBN) and strontium bismuth tantalate SrBi2Ta2O9 (SBT) were measured by the relaxation method (2-150 K), Calvet-type heat-conduction calorimetry (305-570 K) and drop calorimetry (773-1373 K). The temperature dependences of non-transition heat capacities in the form Cpm = 324.47 + 0.06371T −5.0755x106/T2 JK−1 mol−1 (298-1400 K) and Cpm = 320.22 + 0.06451T−4.7001x106/T2 JK−1 mol−1 (298-1400 K) were derived for SBN and SBT, respectively, by the least-squares method from the experimental data. Furthermore, the standard molar entropies at 298.15K S◦m (SBN) = 327.15 +/- 0.80 and S◦m (SBT) = 339.23 +/- 0.72 JK−1 mol−1were evaluated from the low-temperature heat capacity measurements.
Czech name
Tepelná kapacita, entalpie a entropie niobičnanu a tantaličnanu bizmutito-strontnatého
Czech description
Tepelné kapacity a přírůstky entalpie SrBi2Nb2O9 (SBN) a SrBi2Ta2O9 (SBT) byly měřeny relaxační metodou (2-150 K), kalorimetrií Calvetova typu (305-570 K) a vhazovací kalorimetrií (773-1373 K).

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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Publication year
2006
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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