Research progress of high-Curie-temperature BaTiO3-based lead-free thermosensitive ceramics
Barium titanate(BaTiO3)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 BaTiO3-based PTCR ceramics is an inevitable trend.This article first introduced the physical mechanism of PTCR effect,the performance indicators and influencing factors of BaTiO3-based PTCR ceramic materials,and then reviewed the research progress of high-Curie-temperature lead-free BaTiO3-based PTCR ceramic materials.Finally,strategies and approaches to improve the performance of lead-free BaTiO3-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.
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