摘要: 研究了Na0.5Bi0.5TiO和(Na0.5Bi0.50.94Ba0.06TiO陶瓷的电滞回线、压电性能和热滞现象·得到(Na0.5Bi0.50.94 Ba0.06TiO陶瓷的剩余极化=19uC/cm、矫顽场=4.7kV/mm.发现用适量的Ba2+取代(Na0.5Bi0.52+尽管压电性能有所提高,但同时使得材料的温度稳定性大大降低.

关键词: 介电常数, 热滞:相变

Abstract: D-E hysteresis, piezoelectric properties and temperature hysteresis phenomena of (Na0.5Bi0.5)TiO3 and (Na0.5Bi0.5)0.94Ba0.06TiO3 ceramics were investigated. Remnant polariza- tion (Pr=19uC/cm2) and coercive field (Ec =4.7kV/mm) of (Na0.5Bi0.5)0.94Ba0.06TiO3 ceramic were obtained in the experiment. Although the substitution of Ba2+ for (Na0.5Bi0.5)2+ can im- prove the piezoelectric properties, it can also induce the deterioration of temperature stability.

Key words: dielectric constant, temperature hyseresis, phase transition

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