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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F13%3A43895828%21RIV14-MSM-22310___
rdf:type
n8:Vysledek skos:Concept
rdfs:seeAlso
http://www.intechopen.com/books/applications-of-calorimetry-in-a-wide-context-differential-scanning-calorimetry-isothermal-titration-calorimetry-and-microcalorimetry
dcterms:description
Mixed oxides in the system CaO-SrO-Bi2O3-Nb2O5-Ta2O5 possess many extraordinary electric, magnetic and optical properties for which they are used in fabrication of various electronic components. To assess the thermodynamic stability and reactivity of these oxides under various conditions during their preparation, processing and operation, a complete set of consistent thermodynamic data, including heat capacity, entropy and enthalpy of formation, is necessary. This review brings a summary of our results focused on calorimetric determination of heat capacity, entropy end enthalpy of mixed oxides in the system CaO-SrO-Bi2O3-Nb2O5-Ta2O5. Temperature dependences of molar heat capacity in a broad temperature range were evaluated from the experimental heat capacity and relative enthalpy data. Molar entropies at T = 298.15 K were calculated from low temperature heat capacity measurements. Furthermore, the results of calorimetric measurements of the enthalpies of drop-solution in a sodium oxide-molybdenum oxide melt for several stoichiometric mixed oxides in the above mentioned system are reported from which the values of enthalpy of formation from constituent binary oxides were derived. Finally, some empirical estimation and correlation methods (the Neumann-Kopp's rule, entropy-volume correlation and electronegativity-differences method) for evaluation of thermodynamic data of mixed oxides are tested and assessed. Mixed oxides in the system CaO-SrO-Bi2O3-Nb2O5-Ta2O5 possess many extraordinary electric, magnetic and optical properties for which they are used in fabrication of various electronic components. To assess the thermodynamic stability and reactivity of these oxides under various conditions during their preparation, processing and operation, a complete set of consistent thermodynamic data, including heat capacity, entropy and enthalpy of formation, is necessary. This review brings a summary of our results focused on calorimetric determination of heat capacity, entropy end enthalpy of mixed oxides in the system CaO-SrO-Bi2O3-Nb2O5-Ta2O5. Temperature dependences of molar heat capacity in a broad temperature range were evaluated from the experimental heat capacity and relative enthalpy data. Molar entropies at T = 298.15 K were calculated from low temperature heat capacity measurements. Furthermore, the results of calorimetric measurements of the enthalpies of drop-solution in a sodium oxide-molybdenum oxide melt for several stoichiometric mixed oxides in the above mentioned system are reported from which the values of enthalpy of formation from constituent binary oxides were derived. Finally, some empirical estimation and correlation methods (the Neumann-Kopp's rule, entropy-volume correlation and electronegativity-differences method) for evaluation of thermodynamic data of mixed oxides are tested and assessed.
dcterms:title
Calorimetric Determination of Heat Capacity, Entropy and Enthalpy of Mixed Oxides in the System CaO-SrO-Bi2O3-Nb2O5-Ta2O5 Calorimetric Determination of Heat Capacity, Entropy and Enthalpy of Mixed Oxides in the System CaO-SrO-Bi2O3-Nb2O5-Ta2O5
skos:prefLabel
Calorimetric Determination of Heat Capacity, Entropy and Enthalpy of Mixed Oxides in the System CaO-SrO-Bi2O3-Nb2O5-Ta2O5 Calorimetric Determination of Heat Capacity, Entropy and Enthalpy of Mixed Oxides in the System CaO-SrO-Bi2O3-Nb2O5-Ta2O5
skos:notation
RIV/60461373:22310/13:43895828!RIV14-MSM-22310___
n8:predkladatel
n9:orjk%3A22310
n3:aktivita
n13:Z n13:P n13:I
n3:aktivity
I, P(GAP108/10/1006), P(LM2011025), Z(MSM6046137302), Z(MSM6046137307)
n3:dodaniDat
n16:2014
n3:domaciTvurceVysledku
n14:6541690 n14:5395097
n3:druhVysledku
n21:C
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
64157
n3:idVysledku
RIV/60461373:22310/13:43895828
n3:jazykVysledku
n20:eng
n3:klicovaSlova
Ta2O5; Nb2O5; Bi2O3; SrO; CaO; Mixed Oxides; Enthalpy; Entropy; Heat Capacity; Calorimetry
n3:klicoveSlovo
n10:Calorimetry n10:Heat%20Capacity n10:Bi2O3 n10:SrO n10:Nb2O5 n10:Ta2O5 n10:Mixed%20Oxides n10:Entropy n10:Enthalpy n10:CaO
n3:kontrolniKodProRIV
[9C936F23F504]
n3:mistoVydani
Rijeka, Croatia
n3:nazevEdiceCisloSvazku
Neuveden
n3:nazevZdroje
Applications of Calorimetry in a Wide Context - Differential Scanning Calorimetry, Isothermal Titration Calorimetry and Microcalorimetry
n3:obor
n24:CA
n3:pocetDomacichTvurcuVysledku
2
n3:pocetStranKnihy
474
n3:pocetTvurcuVysledku
4
n3:projekt
n4:LM2011025 n4:GAP108%2F10%2F1006
n3:rokUplatneniVysledku
n16:2013
n3:tvurceVysledku
Leitner, Jindřich Svoboda, Pavel Sedmidubský, David Růžička, Květoslav
n3:zamer
n11:MSM6046137307 n11:MSM6046137302
s:numberOfPages
22
n15:doi
10.5772/54064
n7:hasPublisher
InTech
n23:isbn
978-953-51-0947-1
n18:organizacniJednotka
22310