Heat Capacity and Thermodynamic Functions of La2Sn2O7

Ryumin, M. A.; Никифорова, Г. Е.; Tyurin, A. V.; Хорошилов, А.; Кондратьева, Ольга Николаевна; Guskov, V. N.

doi:10.1134/s0020168520010148

Cited by 23 publications

(6 citation statements)

References 27 publications

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“…These demonstrate the good agreement of the heat capacity values obtained by the two methods. The results of adiabatic studies of molar heat capacity are satisfactorily smoothed using the following Equation 24 (Table ):

C_{p} = Σ a_{i} \times \ln {(T / 400)}^{i}

…”

Section: Resultsmentioning

confidence: 99%

“…The heat capacity was measured using adiabatic and differential scanning calorimetry (DSC) methods in accordance with the methods given in. 24 The molecular weight of holmium and erbium orthotantalates was calculated using the atomic weight values recommended in. 25 High-temperature X-ray diffraction (HTXRD) studies were performed using a Shimadzu X-ray diffractometer with attachment HA-1001 to conduct high-temperature studies in the region of 298-1173 K, with radiation CuK α , λ = 1.5418 Å.…”

Section: Methodsmentioning

confidence: 99%

“…The morphology of the resulting ceramics was studied using a Cross Beam Zeiss NVision 40 electron microscope (SEM). The heat capacity was measured using adiabatic and differential scanning calorimetry (DSC) methods in accordance with the methods given in 24 . The molecular weight of holmium and erbium orthotantalates was calculated using the atomic weight values recommended in 25 .…”

Section: Methodsmentioning

confidence: 99%

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Thermal expansion and heat capacities of holmium and erbium orthotantalates ceramics

Гагарин

Guskov

et al. 2020

J. Am. Ceram. Soc.

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Monoclinic M-orthotantalates of holmium and erbium ceramics were obtained by co-precipitation and annealing at 1773 K and characterized by X-ray powder diffraction, scanning electron microscopy, and chemical analysis. Using the high-temperature X-ray diffraction method, the temperature dependence of the monoclinic lattice parameters of both ceramics were determined at range 298-1273 K. The molar heat capacity of M-HoTaO 4 and M-ErTaO 4 were measured by adiabatic (7-350 K) and differential scanning (320-1350 K) calorimetry. Standard thermodynamic function (entropy, enthalpy change, and reduced Gibbs energy) were calculated on the smoothed values of molar capacity, without taking into account contribution of low-temperature interval: 0-7 K for M-HoTaO 4 and 0-8 K for M-ErTaO 4. The general shape of the anomalous Schottky contribution to the molar heat capacity was determined.

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C_{p} = Σ a_{i} \times \ln {(T / 400)}^{i}

…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Thermal expansion and heat capacities of holmium and erbium orthotantalates ceramics

Гагарин

Guskov

et al. 2020

J. Am. Ceram. Soc.

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“…The initial substances were terbium sesquioxide (99.99 wt %, LLC Lankhit), hafnium dioxide (99.99 wt %, LLC Lankhit), hydrochloric acid (35-38 wt %, special-purity grade 20-4, LLC Khimmed), and ammonia solution (25-28 wt % NH 4 OH, specialpurity grade, LLC Khimmed). The methods of synthesis, measurement of thermal expansion and heat capacity, and processing of results were described in detail previously [13,14]. The final annealing at 1550 K for 4 h gave Tb 1.994 Hf 2.006 O 7.003 .…”

Section: Methodsmentioning

confidence: 99%

Thermodynamic Functions of Terbium Hafnate

Guskov

Гагарин

Guskov

et al. 2021

Russ. J. Inorg. Chem.

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“…A usual DSC heating program generates an enthalpy curve as function of the heating temperature. Based on the areas under DSC curves measured for baseline, standard and sample, the specific heat can be obtained as: 69,70…”

Section: Thermal Analysis Of the Spnsmentioning

confidence: 99%