Review—Design and Doping Strategies of Bi2Ti2O7 Pyrochlores for Elevating Dielectric Properties

Abstract Bismuth titanate (Bi2Ti2O7) materials are a novel class of crystalline, electroceramic materials exhibiting symbiotic electrical properties belonging to the pyrochlore type, a realizable, eco-friendly, industrial-scale hybrid material. In-depth research on these materials has gradually increased in recent years to increase electronic applications. This review focuses on the synthesis, phase transition, and dielectric behavior of high-quality bismuth titanate pyrochlore coordinated with several elements through a doping strategy. The unique advances in bismuth titanate pyrochlores and explanations of crystal structure mechanisms were summarized. The anomalous dielectric properties of bismuth titanate pyrochlores and their state-of-the-art progress with significant advances are highlighted. This review aims to identify recent bismuth titanate pyrochlore based on the way of their fabrication. It briefly outlines synthetic methods, dielectric properties, and potential applications of these materials and details upcoming challenges and strategies for the development of these materials. Also, this review elaborates an outline of the bismuth titanate pyrochlore materials as future candidates, which may draw significant attention to practical applications.