Heat capacity, thermal expansion and barocaloric effect in fluoride K2TaF7
URI (для ссылок/цитирований):
https://link.springer.com/article/10.1007%2Fs10853-019-03924-8https://elib.sfu-kras.ru/handle/2311/129261
Дата:
2019Журнал:
Journal of Materials ScienceКвартиль журнала в Scopus:
Q1Квартиль журнала в Web of Science:
Q2Библиографическое описание:
Flerov, I. N. Heat capacity, thermal expansion and barocaloric effect in fluoride K2TaF7 [Текст] / I. N. Flerov, M. V. Gorev, A. V. Kartashev, E. I. Pogorel’Tsev, N. M. Laptash // Journal of Materials Science. — 2019.Аннотация:
The heat capacity and thermal expansion of potassium heptafluorotantalate were studied. The room temperature phase P21=c is stable at least to 4 K. The strong first-order phase transition P21=c Pnma at T0 ¼ 486:2K is accompanied by giant changes in the entropy, DS0 ¼ 22:3 J ðmolKÞ 1; and volume strain, dV0=V ¼ 3:6%. A rather high sensitivity of K2TaF7 to pressure was found,
dT0=dp ¼ 220KGPa 1. Significant extensive and intensive barocaloric effects are found at low pressure. The possibility of improving the barocaloric properties is discussed.