Recrystallization Phenomenon in Semiconducting Barium Titanate

Abstract
Semiconducting barium titanate is well known for its PTCR property. Like other process parameters, viz. mixing, calcination and sintering time, cooling rate etc, the effect of sintering temperature strongly influences the PTCR property. A systematic study on the effect of sintering temperature reveals that a rapid recrystallization occurs when the specimen is sintered above 1250°C. Microstructural features of the specimen have been correlated with their electrical properties.