摘要
采用复相混合烧结制备出掺杂钾离子的 PZN基陶瓷 ,研究了钾离子对 PZN- BT- PT三元系弛豫铁电陶瓷的相结构、介电性能的影响。结果表明 ,钾离子掺杂可使材料的居里温度向低温方向移动 ,降低陶瓷的介电常数 ,但可有效改善陶瓷试样的温度稳定性 ;复相混合烧结可以消除由于钾离子掺杂而引起的焦绿石相 ;二者结合可获得具有纯钙钛矿相结构 ,弥散相变度宽 (～ 10 0℃ ) ,室温介电常数高 ,介电损耗低 (0 .0 11)的 PZN基弛豫铁电陶瓷 。
The effect of K + doped on phase structure and dielectric constant of PZN BT PT ceramics was investigated The results show that the Curie temperature can be shifted to lower temperature after K + doped in the ceramics Dielectric constant will decrease with increasing K + additive, but temperature stability can be improved at the same time Composite sintering can eliminate pyrochlore phase,which existed in K + doped ceramics The temperature stability can be improved greatly with combining composite sintering technology to the doping technology
出处
《材料工程》
EI
CAS
CSCD
北大核心
2001年第8期22-24,28,共4页
Journal of Materials Engineering
基金
航空科学基金资助项目 (97G5 3 0 83 )
