过量钨和铅对PNW.PMN.PZT陶瓷电性能的影响-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

化学与材料科学

过量钨和铅对PNW.PMN.PZT陶瓷电性能的影响

皇晓辉，张锐，杨祖培，晁小练

(陕西师范大学化学与材料科学学院，陕西西安 710062)

皇晓辉，男，硕士研究生，主要从事压电陶瓷材料及器件开发的研究.

摘要:

采用传统陶瓷工艺制备了不同WO3和Pb3O4添加量的PNW-PMN-PZT四元系压电陶瓷,用XRD 技术分析了陶瓷的相结构,研究了不同WO3和Pb3O4添加量对陶瓷的机械品质因数Qm、机电耦合系数Kp、压电常数d33以及介电损耗tan δ的影响．结果表明, 在800℃预烧温度、1 150℃烧结温度下，当WO3量为0.6%、Pb3O4量为0.5%时，陶瓷具有优良的电性能，其主要性能参数为：Kp=0.66,Qm=1 318,d33=430 pC/N,εr=2 229, tan δ=0.006 6，该材料可作为大功率压电变压器的候选材料．

关键词：

PNW-PMN-PZT压电陶瓷；相结构；电学性能；压电变压器

收稿日期：

2009-01-15

中图分类号：

TM 282

文献标识码：

文章编号：

1672-4291(2009)05-0052-04

基金项目：

国家自然科学基金资助项目（20771070）

Doi:

Effects of WO3 and Pb3O4 additions on the electrical properties of PNW-PMN-PZT piezoelectric ceramics

HUANG Xiao-hui, ZHANG Rui, YANG Zu-pei* , CHAO Xiao-lian

(College of Chemistry and Materials Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)

Abstract:

The PNW-PMN-PZT ternary system piezoelectric ceramics with different additions of WO3 and Pb3O4 were successfully prepared by the conventional mixed-oxide method. Effects of the additions on the phase structure and electrical properties of ceramics were investigated. The results revealed that when calcining temperature was 800℃ and sintering temperature was 1 150℃, the optimized electrical properties were obtained in case of the 0.6% WO3 and 0.5% Pb3O4, and the parameters were Kp=0.66,Qm=1 318,d33=430 pC/N,εr=2 229 and tan δ=0006 6, respectively. This composition with optimized properties is considered to be a good candidate for preparation of high power piezoelectric transformers.

KeyWords:

PNW-PMN-PZT piezoelectric ceramics; phase structure; electrical properties; piezoelectric transformers