烧结保温时间对KNN-LS-BF-0.15%Cu压电陶瓷性能的影响  

Effects of Sintering Time on Properties of KNN-LS-BF-0.15%Cu Piezoelectric Ceramics

作　　者：翟霞[1] 王华[1] 许积文[1] 赵霞妍[1] 杨玲[1] 

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004

出　　处：《电工材料》2012年第2期42-45,共4页Electrical Engineering Materials

基　　金：广西自然科学基金重点项目(2010GXNSFD013007)

摘　　要：采用传统的陶瓷制备工艺,在1 060℃下分别保温2 h、4 h和6 h,制备了{0.996[0.95(Na0.5K0.5)-NbO3-0.05LiSbO3]-0.004FeBiO3}+0.15mol%CuO(简称KNN-LS-BF-0.15%Cu)压电陶瓷,研究了烧结保温时间对陶瓷性能的影响。结果表明,过短的烧结保温时间并不能促成陶瓷晶粒的长成,但超过4 h后继续延长烧结保温时间对晶粒尺寸的影响不大;随着烧结保温时间的延长,KNN-LS-BF-0.15%Cu陶瓷的压电常数d33、机电耦合系数kp和介电常数εr先升高后降低,而介电损耗tanδ和机械品质因数Qm则随之下降;当烧结保温时间为4 h时,样品具有最佳的综合性能:d33=185 pC/N,kp=0.28,εr=1054.25,tanδ=2.1%,Qm=53.39。The lead-free ceramics {0.996[0.95（Na0.5K0.5）NbO3-0.05LiSbO3]-0.004FeBiO3}＋0.15mol%CuO were prepared by the traditional method with different sintering time. The effects of sintering time on d33, kp, εr, tanδ and Qm were studied. The results show that there are no grains exist when the sintering time is too short, and the sintering time is the important factor for the growth of grains. The properties d33,kq, and εr become better at first and then dropped, while tanδ and Qm decrease with the extension of sintering time. The best combination properties are got when sintering time is 4h in this paper： d33=185 pC/N, kp=0.28, εr=1054.25, tanδ=2.1%, Qm=53.39.

关 键 词：压电陶瓷 烧结保温时间 性能 

分 类 号：TM282[一般工业技术—材料科学与工程]