Calcium zirconate is primarily used in high-temperature applications due to its excellent thermal stability and resistance to chemical attack. It serves as a refractory material in furnace linings and crucibles where exposure to extreme heat and corrosive substances is common. Its ability to withstand thermal shock makes it suitable for components in industrial kilns and incinerators.

In the field of electronics, calcium zirconate is used as a dielectric material in capacitors, especially in devices requiring stable performance under varying temperatures. It also finds use in sensors and solid oxide fuel cells due to its ionic conductivity at elevated temperatures.

Additionally, calcium zirconate is employed in environmental applications, such as immobilizing hazardous waste, including radioactive materials. Its stable crystal structure helps encapsulate toxic ions, preventing leaching and supporting safe long-term storage.

It is also explored in ceramic composites for aerospace and defense technologies, where durability under extreme conditions is critical.