高居里温度BaTiO_(3)基无铅热敏陶瓷的研究进展

Research progress of high-Curie-temperature BaTiO_(3)-based lead-free thermosensitive ceramics

钛酸钡(BaTiO_(3))基正温度系数电阻(PTCR)陶瓷材料由于具有独特的电阻-温度特性,被广泛用于制作各种热敏电阻器件。随着电子材料及元器件无铅化的要求日益迫切,高居里温度BaTiO_(3)基PTCR陶瓷的无铅化是必然发展趋势。介绍了PTCR效应的物理机制、BaTiO_(3)基PTCR陶瓷材料的性能指标及其影响因素,综述了高居里温度无铅BaTiO_(3)基PTCR陶瓷材料的研究进展,讨论了提高无铅BaTiO_(3)基PTCR陶瓷材料性能的策略与途径,以促进这一领域的进一步发展。

Barium titanate(BaTiO_(3))based positive temperature coefficient resistance(PTCR)ceramics are widely employed in the production of various thermistor devices due to their unique resistance-temperature characteristics.With the increasingly urgent demand for lead-free electronic materials and components,the lead-free development of high-Curie-temperature BaTiO_(3)-based PTCR ceramics is an inevitable trend.This article first introduced the physical mechanism of PTCR effect,the performance indicators and influencing factors of BaTiO_(3)-based PTCR ceramic materials,and then reviewed the research progress of high-Curie-temperature lead-free BaTiO_(3)-based PTCR ceramic materials.Finally,strategies and approaches to improve the performance of lead-free BaTiO_(3)-based PTCR ceramic materials were discussed,and future prospects were proposed from manufacturing,performance and device aspects for the promotion of further development in this field.