CaZrO3

CaZrO3, or calcium zirconate, is a ceramic oxide with a perovskite-related structure. It consists of calcium ions occupying the larger A-sites and zirconium ions on the smaller B-sites within an oxide framework, forming a three-dimensional network of corner-sharing octahedra. At room temperature, many samples crystallize in an orthorhombic form derived from the perovskite structure, and the material remains stable over wide temperature ranges.

Properties of CaZrO3 include high thermal stability and chemical durability, along with insulating electrical behavior and a relatively wide band gap. Its high melting point and resistance to chemical attack make it suitable for use at elevated temperatures and in harsh environments. As a ceramic, it is typically nonreactive with many common materials, contributing to its appeal as a durable substrate and refractory component.

Synthesis and processing of CaZrO3 are commonly carried out by solid-state reaction, mixing calcium oxide or calcium carbonate with zirconia (ZrO2), followed by calcination and high-temperature sintering to achieve dense ceramics. Alternative routes such as sol-gel and combustion synthesis are also used to control particle size and microstructure.

Applications of CaZrO3 span several areas. It is employed as a high-temperature refractory ceramic and as a substrate material for oxide thin-film devices and research into perovskite-like oxides. Doped or substituted forms of CaZrO3 can serve as hosts for luminescent activators in phosphor materials, enabling emissions for optical applications. Overall, CaZrO3 is valued for its thermal and chemical stability and its structural compatibility with related oxide materials.