This article is cited in 9 papers

Phase transitions

Features of the doping effect on YAlO$_3$ phase sequences during synthesis from an amorphous precursor state

I. M. Shmyt'ko, I. N. Kiryakin, G. K. Strukova

Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region

Abstract: Using X-ray diffraction methods, it has been shown that small lanthanum (La) dopants during solid-phase synthesis of YAlO$_3$ from an amorphous precursor state initiate the formation of the high-temperature hexagonal modification of yttrium aluminate in the first crystallization stages, whereas the equilibrium perovskite phase has an orthorhombic cell. At the same time, during YAlO$_3$ synthesis without dopants, yttrium-aluminum garnet Y$_3$Al$_5$O$_{12}$ is formed in the first crystallization stages, rather than the perovskite modification, as it follows from the precursor stoichiometry. The effect of lanthanum dopants on YAlO$_3$ phase sequences during synthesis from the amorphous precursor state is qualitatively explained.

Received: 03.12.2012
Accepted: 22.01.2013

 English version: Physics of the Solid State, 2013, 55:7, 1463–1467

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