| 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 l250°C. Microstructural
features of the specimen have been correlated with their electrical
properties. |
