Optimization of Dielectric Constant and Temperature Coefficient of BZN-Based Ceramics
Ren Qingli
(Xi'an Jiaotong University, Xi'an 710049, China)

Abstract: The optimization of dielectric constant and temperature coefficient of BZN-based ceramics was investigated. Ceramic samples were prepared by conventional processing technology.The effect of different presintering techniques for BZNª²based ceramics doped with titania on its phase composition and dielectric properties is discussed. By properly choosing the presintering temperature raising rate, the temperature stability of the dielectric constant can be optimized; and the an atase titania doping can optimize the temperature coefficient. The anatase titania doped BZN compositions with diphasic pyrochlore structures have excellent dielectric properties and high dielectric constants with stable temperature dependence.
Keywords: pyrochlore structure;BZN-based ceramics;phase transition;dielectric property