Well-monocrystallized LaCrO3 particles from a LaCrO4 precursor by supercritical hydrothermal technique

Abstract

LaCrO₃ based materials are currently utilized in a variety of electrical applications at high temperature. However, the morphology of LaCrO₃ powder is much less understood as compared to its bulk counterpart. In this work, LaCrO₃ powder was synthesized from LaCrO₄ precursor by a supercritical hydrothermal technique (SHT). The majority exhibited a pure orthorhombic phase with well-monocrystallized grains of 3–9 μm. This work confirms that dominating faces in LaCrO₃ grains are {0 1 0} and {0 1 1} surfaces, which have equivalent surface-energy due to the similarity of their surface structure.