Heat capacity, enthalpy and entropy of strontium niobates Sr2Nb10O27 and Sr5Nb4O15

Leitner, J.; Šipula, I.; Růžička, Květoslav; Sedmidubský, David; Svoboda, P.

doi:10.1016/j.jallcom.2009.03.047

Cited by 10 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ΔoxH(298 K) values derived from hightemperature EMN measurements [7,8,11] for the CaO-Nb2O5 oxides and the assessed values from the phase diagram for the SrO-Nb2O5 oxides [12] are also presented in Table 7. [27] was used for the calculation, g) The value ΔTH(Bi2O3, 973 → 1073 K) = 13.61 kJ mol -1 [28] was used for the calculation, h) From ref. [52], T = 973 K. Table 7.…”

Section: Evaluation Of Enthalpy Of Formationmentioning

confidence: 99%

Calorimetric Determination of Heat Capacity, Entropy and Enthalpy of Mixed Oxides in the System CaO–SrO–Bi2O3–Nb2O5–Ta2O5

Leitner¹,

Sedmidubský²,

Svoboda³

2013

Applications of Calorimetry in a Wide Context - Differential Scanning Calorimetry, Isothermal Titration Calorimetry and Microca

View full text Add to dashboard Cite

Section: Evaluation Of Enthalpy Of Formationmentioning

confidence: 99%

Calorimetric Determination of Heat Capacity, Entropy and Enthalpy of Mixed Oxides in the System CaO–SrO–Bi2O3–Nb2O5–Ta2O5

Leitner¹,

Sedmidubský²,

Svoboda³

2013

Applications of Calorimetry in a Wide Context - Differential Scanning Calorimetry, Isothermal Titration Calorimetry and Microca

View full text Add to dashboard Cite

“…In a systematic study of the thermochemical properties of complex oxides in the Bi 2 O 3 -CaO-SrO-Nb 2 O 5 - Ta [19]. Furthermore, the values of the molar entropies at 298.15 K were evaluated from low-temperature heat capacity measurements.…”

Section: Introductionmentioning

confidence: 99%

Enthalpy of formation of selected mixed oxides in a CaO–SrO–Bi2O3–Nb2O5 system

Leitner¹,

Nevřiva²,

Sedmidubský³

et al. 2011

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

“…This concerns not only the group of nitrides [24,[28][29][30], but also a variety of ternary materials [40][41][42]. Such improper C p (T) data simulations provided the main motivation for the completion of the present study.…”

mentioning

confidence: 99%

“…[39]. Here, for a better understanding of its physical basis and a visualization of its high degree of flexibility, we display first of all a generalized version of this hybrid model which offers, among other things, the perspective of possible future applications not only to elemental or binary materials, but also to more complicated systems (with larger sets of optical branches; see, e.g., [40][41][42]). In Section 3 we restrict ourselves to the original version [39] of this hybrid model, which is based on a consideration of only three Einstein terms (two or one for the lower and upper sections, respectively, of the PDOS spectra).…”

mentioning

confidence: 99%

Representative hybrid model used for analyses of heat capacities of group‐IV, III–V, and II–VI materials

Pässler

2010

Physica Status Solidi (b)

View full text Add to dashboard Cite

Characteristic non-Debye features inherent to the dispersionrelated hybrid model, which had been devised for the sake of physically adequate representations of isobaric heat capacities of semiconductor and wide band gap materials, are demonstrated and discussed in some detail. We perform least-meansquare fittings of low-and high-temperature C p (T) data sets that are available for group-IV materials (diamond, Si, Ge, 3C-SiC), III-V materials (BN, BP, BAs, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, InP, InAs, InSb), and II-VI materials (ZnO, ZnS, ZnSe, ZnTe, CdO, CdS, CdSe, CdTe). The simulations of the C p (T) data sets under study, particularly with respect to the cryogenic region, are graphically represented, and existing data deficiencies are discussed. Important by-products of the fittings are presented within the frame of Supporting Information (online at: www.pss-b.com). There are given in tabulated form the characteristic phonon energies, e P (m), for integral orders, m ¼ À2, À1, 0, 1, 2, and 4, including further dispersion-related parameters like average phonon temperatures, Q P , dispersion coefficients, D P , and high-temperature limiting values of Debye temperatures, Q Dh (1). Furthermore, basing on comprehensive calculations of the C p (T) dependences from absolute zero up to room temperature, we provide representative values of entropies, S p (T), enthalpies, H p (T) À H p (0), and Gibbs free energies, G p (T) À G p (0), for the frequently considered reference point, T r ¼ 298.15 K, the accurate knowledge of which is indispensable for possible high-temperature continuations of these standard thermodynamic functions within the frame of the commonly used thermo-chemical formalism.

show abstract

Heat capacity, enthalpy and entropy of strontium niobates Sr2Nb10O27 and Sr5Nb4O15

Cited by 10 publications

References 16 publications

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

Enthalpy of formation of selected mixed oxides in a CaO–SrO–Bi2O3–Nb2O5 system

Representative hybrid model used for analyses of heat capacities of group‐IV, III–V, and II–VI materials

Contact Info

Product

Resources

About