Zn-B玻璃掺杂的(K_(0.5)Na_(0.44)Li_(0.06))(Nb_(0.84)Ta_(0.1)Sb_(0.06))O_3陶瓷相变及电学性能研究  

Phase Transition and Electrical Properties of (K_(0.5)Na_(0.44)Li_(0.06))(Nb_(0.84)Ta_(0.1)Sb_(0.06))O_3 Ceramics with Zn-B Glass Sintering Aid

作　　者：范桂芬[1,2] 吕文中[1,2] 王允祺[1,2] 汪小红[1,2] 梁飞[1,2] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074 [2]华中科技大学电子信息功能材料教育部重点实验室(B类),湖北武汉430074

出　　处：《压电与声光》2011年第3期441-447,共7页Piezoelectrics & Acoustooptics

基　　金：New Century Excellent Talents in University(NCET-07-0329);Hubei Provincial Natural Science Foundation(2008CDB283)~~

摘　　要：研究了Zn-B玻璃掺杂的(K0.5Na0.44Li0.06)(Nb0.84Ta0.1Sb0.06)O3(KNLNTS)陶瓷的制备、相变及电学性能。研究发现,Zn-B玻璃能够有效地促进铌酸钾钠基无铅压电陶瓷的烧结特性。XRD结果显示Zn-B玻璃掺杂的KNLNTS陶瓷为正交-四方共存结构,随掺杂量的增加正交结构相的含量逐渐增加;并且降低烧结温度能够有效地抑制第二相的产生。介电温谱测试结果显示Zn-B玻璃掺杂的KNLNTS陶瓷其居里温度先降后增在x=0.1时达到最小值。在1050℃保温5 h条件下烧结可以获得最佳的压电性能:d33=197 pC/N,kp=0.37,εr=975,tanδ=0.028。The preparation,phase transition and electrical properties of（K0.5Na0.44Li0.06）（Nb0.84Ta0.1Sb0.06）O3（KNLNTS） lead-free piezoelectric ceramics with Zn-B glass sintering aid were studied in this paper.It was fount that the addition of Zn-B glass could greatly enhance the sintering properties of KNLNTS ceramics.The XRD results showed that Zn-B doped KNLNTS ceramics had the coexistence structure of the orthorhombic and tetragonal phase,and the orthorhombic phase increased gradually with the amount of Zn-B doping increasing.Lowering the sintering temperature could inhibit the production of the second phase.The dielectric spectrum test results showed that the Curie temperature of the Zn-B-doped KNLNTS ceramics first decreases and then increases,it reaches the minimum at x=0.1.At the sintering temperature of 1 050 ℃ with the soaking time of 5 h,the Zn-B doped KNLNTS-x ceramics obtained the optimum piezoelectric properties of d33=197 pC/N,kp=0.37,εr=975 and tan δ=0.028.

关 键 词：压电 无铅 相变 铌酸钾钠 

分 类 号：TN304[电子电信—物理电子学]