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材料工程  2004 

铅欠缺对PZN基陶瓷有序微区、介电和电致应变性能的影响

, PP. 22-25

Keywords: PZN基陶瓷,铅欠缺,有序微区,介电性能,电致应变

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Abstract:

研究了初始粉体中氧化铅欠缺对PZN基陶瓷的相组成、有序微区、介电和电致应变性能的影响。研究发现,随着氧化铅欠缺量的增大,预烧粉体和陶瓷的焦绿石相含量逐渐增大、钙钛矿相含量逐渐减少。当铅欠缺小于1%时,随着铅欠缺量的增大,PZN基陶瓷的有序微区、介电常数和电致应变大幅度增大;而当铅欠缺大于1%时,铅欠缺会使介电和电致应变性能下降。而铅欠缺对介电损耗影响很小。铅欠缺使介电和电致应变性能增加的原因主要是由于"有效有序微区"尺寸的增大和晶界间过量氧化铅层的消除。

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