Dysprosium orthotantalate ceramics: Thermal expansion and heat capacity

Гагарин, П. Г.; Guskov, A. V.; Guskov, V. N.; Tyurin, A. V.; Хорошилов, А.; Гавричев, К. С.

doi:10.1016/j.ceramint.2020.09.072

Cited by 11 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Temperature dependences of unit cell volumes M ‐orthotantalates: 1 – holmium, 2 – erbium, 3 – dysprosium, 29 4 – neodymium, 30 and 5 – yttrium 31 are shown in Figure 1. One can see, the temperature dependence curves are almost parallel.…”

Section: Resultsmentioning

confidence: 99%

Thermal expansion and heat capacities of holmium and erbium orthotantalates ceramics

Гагарин

Guskov

et al. 2020

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Thermal expansion and heat capacities of holmium and erbium orthotantalates ceramics

Гагарин

Guskov

et al. 2020

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

show abstract

“…The final annealing at 1550 K for 4 h gave Tb 1.994 Hf 2.006 O 7.003 . Such a deviation from stoichiometry cannot introduce a significant error to the molar heat capacity [15]. X-ray powder diffraction studies showed that the obtained single-phase sample has a cubic structure of the pyrochlore type with the unit cell parameter a = 10.455(4) Å (Fig.…”

Section: Methodsmentioning

confidence: 99%

Thermodynamic Functions of Terbium Hafnate

Guskov

Гагарин

Guskov

et al. 2021

Russ. J. Inorg. Chem.

View full text Add to dashboard Cite

show abstract

“…viously [18], this deviation from stoichiometry cannot significantly affect the molar heat capacity value. The formula weight calculated as recommended in [19] was 772.9038 g/mol.…”

Section: Physical Methods Of Investigationmentioning

confidence: 99%