Bi0．5Na0．5TiO3无铅压电陶瓷的结构有序化控制  

Textured microstructure development for the lead-free ceramics of Bi_(0.5)Na_(0.5)TiO_3

作　　者：施威海[1] 刘云飞[1] 周刘飞[1] 施书哲[1] 吕忆农[1] 

机构地区：[1]南京工业大学材料科学与工程学院,材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2008年第1期54-58,62,共6页Journal of Nanjing Tech University(Natural Science Edition)

摘　　要：以片状SrTiO3晶粒作为模板,使用模板晶粒生长法(TGG)控制制备[001]取向的有序化Bi0.5Na0.5TiO3压电陶瓷,同时研究了过量Bi2O3、烧结温度以及掺MnO对Bi0.5Na0.5TiO3有序度的影响.研究结果表明,过量Bi2O3的最佳掺入量为BNT粉料质量的1%;1 190℃是合适的烧结温度,在1 190℃下,BNT-1试样的有序度相对较高,有序度为88.2%;MnO的加入有效地提高了试样的有序度,并且降低了试样的烧结温度,同时也使得烧结温度范围变窄.在烧结温度为1 170℃下,掺质量分数为0.3%MnO的BNT-1试样的有序度为91.1%.Textured Bi0. 5 Na0. 5TiO3 （BNT） ceramics with a preferred [ 001 ] orientation were prepared by a Template Grain Growth （TGG） method with plate-like SrTiO3 particles as template for BNT, and effect of excess Bi203, sintering temperature and MnO on the orientation of Bi0. 5 Na0. 5TiO3 ceramics was discussed. The results indicat that the optimal addition of excess Bi2O3 is 1% of the BNT powder mass fraction, 1 190 ℃ of sintering temperature, and degree of orientation of BNT- 1 at 1 190 ℃ is relatively larger, f= 88.2%. Furthermore, the addition of MnO improved the degree of orientation, reduced the sintering temperature and the range of sintering temperature of sampies. A large lotgering factor of 91.1% is obtained in 0. 3% MnO mass fraction doped BNT - 1 at 1 170 ℃.

关 键 词：Bi0.5Na0.5TiO3 无铅压电陶瓷 模板晶粒生长法 

分 类 号：TQ174[化学工程—陶瓷工业]