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High Temperature Ceramic Capacitors used in petroleum drilling, hybrid vehicles, and aviationand other areas, in the extreme temperature environment of working with smaller-capacity temperature change rate, high insulation resistance and a series of excellent electrical performance while Since the equivalent resistance of ceramic capacitor is the lowest common capacitor, formed by parallel stacking multilayer ceramic capacitors, the equivalent number of resistors in parallel, so the equivalent resistance can be lower, thereby increasing resistance to high current and the absorption of surge current capacity, ceramic capacitors suitable for a wide frequency range. Therefore, the high-temperature ceramic capacitors are commonly used to replace tantalum electrolytic capacitors, with wide applications and a bright prospect.In this thesis, barium titanate as the main material, through the rare earth elements, glass materials, the incorporation of additives, in-depth analysis of the barium titanate modification mechanism, such as mobile effect, broadening effect, liquid phase sintering, etc., and to explore the additives of different components of the electrical properties of barium titanate. The main contents are:1. A detailed study of rare earth elements on the Curie peak of barium titanate ceramics broadening effect and the reasons for this effect;2. A detailed study of the glass phase of the accession of the barium titanate ceramic sintering temperature, liquid phase sintering theory analysis of its causes;3. Analysis of the impact of high temperature insulation resistance ceramic material factors, and proposed ways to improve high-temperature insulation resistance;4. A systematic exposition of the blockers on the barium titanate ceramic grain refinement effect.
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