Influence of rare earth coordinated elements in titanium-based pyrochlores and their dielectric phenomena

Rare earth-coordinated titanium pyrochlores are one of the significant materials among inorganic ceramics for electronic applications. The titanate pyrochlores usually produce high ionic conductivity and low activation energy. It can also ascribe chemical stability, mechanical integrity, and good agreement with adjoining electrode materials. The rare-earth-based pyrochlores are acceptable for electrolyte applications as principal oxygen ion conductors. These materials are competitive for high-temperature solid oxide fuel cells. Only a few review re-ports are available on this unique structural compound. Fewer research data's available about pyrochlore ma-terials with significant electronic properties. Also, this article summarizes the crystal structure of pyrochlore materials with the coordination chemistry of rare earth elements on the various properties, including the dielectric response. This review mainly focuses on the compelling microcrystalline structures of pyrochlore materials and highlights its modernization progress. Specifically, the applications of rare earth pyrochlore ti-tanates were also introduced and evaluated. The perspective and doping strategies are featured based on their future developments.

Automated summary

Rare earth-coordinated titanium pyrochlores are important materials for electronic applications in inorganic ceramics. These titanate pyrochlores exhibit high ionic conductivity, low activation energy, chemical stability, mechanical integrity, and compatibility with electrode materials. They are suitable for electrolyte applications and competitive in high-temperature solid oxide fuel cells. This review article summarizes the crystal structure, coordination chemistry of rare earth elements, and various properties, including dielectric response, of pyrochlore materials. It also highlights their microcrystalline structures and recent advancements, introduces and evaluates rare earth pyrochlore titanates applications, and discusses future developments and doping strategies.