摘要
采用固相反应法获得改性的xSb-CaBi2Nb2O9（CBNO）（x=0-0．08）铋层状压电陶瓷。测试结果表明，加入Sb5＋降低了烧结温度，提高了致密度和平面机电耦合系数，样品均为单一相，在Sb含量摩尔分数为4％时，晶粒形貌均匀，压电和机电性能达到最高，如3为12．6pC／N，Kp=12．1％，tanδ=0．4％。添加物并没有显著降低CBNO陶瓷的居里温度，在700℃以下表现了良好的温度稳定性。
High Cuie temperature piezoelectric ceramics based on Sb-doped CaBi2Nb2O9 （x=0-0.08） were prepared by a conventional solid state reaction method. The test results show that the addition of Sb2O5 not only improves the density and the planar electromechanical coupling factor of the ceramic, but also decreases the sintering temperature. XRD patterns show that all the ceramic samples possess a single-phase of bismuth oxide layer structure. The CBNO＋4% of mole fraction of Sb content ceramic exhibits the optimum electrical properties：d33=12.6 pC/N, Kp=12.1%, tanδ=0.4%. Research of SEM indicates that the morphology of grain is homogeneous. The ceramic added with Sb205 shows good temperature stability below 700 ℃ and Curie temperature decreases insignificantly.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2014年第8期22-24,共3页
Electronic Components And Materials
关键词
固相反应法
压电陶瓷
改性
烧结
CaBi2Nb2O9
居里温度
solid state reaction method
piezoelectric ceramics
modification
sintering
CaBi2Nb2O9
Curie temperature
