Research Progresson Crystal Structure, Defect Regulation, and Dielectric Property Modification of Barium Titanate Ferroelectric Ceramics

Because of its superior dielectric qualities, barium titanate (BaTiO3), a common perovskite-type ferroelectric material, has found widespread use in electronics, telecommunications, and energy. However, its continued use has been constrained by problems such a high Curie temperature, a small temperature range, and a low dielectric constant at ambient temperature. This research explores the crystal structure of barium titanate, types of defects, and their mechanisms impacting dielectric performance by methodically evaluating pertinent contemporary local and foreign literature. Additionally, it offers a thorough examination of how nanocomposite technology and rare earth element doping optimize barium titanate's dielectric characteristics. According to research, barium titanate's crystal structure and dielectric characteristics may be efficiently controlled by rare earth element doping, and nanocomposite technology can improve the material's breakdown strength and dielectric constant by creating nano-scale heterostructures. Additionally, optimizing the sintering process parameters and other methods can also improve the performance of barium titanate to some extent. These modification strategies provide theoretical support and practical guidance for enhancing the overall performance of barium titanate ceramics and expanding their applications in multilayer ceramic capacitors (MLCCs) and other electronic devices.