施主掺杂的钛酸钡陶瓷的PT CR效应来源于晶界上的钡空位。
Barium vacancy existed in grain boundary is responsible for the PTCR effect observed in donor doped barium titanate ceramics.
在高温下，由于钡空位的增加、晶粒较细晶界较多和晶界的氧化作用等增加了材料的PTC效应。
The improvement of the PTC characteristics was induced by the more oxide of the grain boundary of the refiner particle size and an increase of the Barium vacancy.
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