Thermal and electrical properties of Ca5Mg4−xZnx(VO4)6 (0 ≤ x ≤ 4).

Autor:	Tolkacheva, Anna S., Shkerin, Sergey N., Zemlyanoi, Kirill G., Reznitskikh, Olga G., Pershina, Svetlana V., Khavlyuk, Pavel D.
Předmět:	THERMAL properties GARNET DIFFERENTIAL scanning calorimetry ELECTRIC conductivity ALUMINUM-zinc alloys IMPEDANCE spectroscopy
Zdroj:	Journal of Thermal Analysis & Calorimetry; May2019, Vol. 136 Issue 3, p1003-1009, 7p
Abstrakt:	Calcium vanadates Ca5Mg4−xZnx(VO4)6 (0 ≤ x ≤ 4) have been studied for the first time using a set of high-temperature methods of analysis. The onset of melting process determined from differential scanning calorimetry decreases from 1158 to 881 °C (± 1.5 °C) with increasing of x (dopant's content). CTE temperature dependence is found to show a hysteresis. Electrical transport properties measured by impedance spectroscopy in air of different humidity are also discussed. The value of electrical conductivity does not depend on air humidity. It is found to equal to 1.5 × 10−6 S cm−1 at 720 °C for Ca5Mg4(VO4)6 which is specific for garnet-related crystals. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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