摘要
本文研究了过量氧化铅和氧化铅气氛对改性钛酸铅压电陶瓷机电性能、显微结构、晶体结构以及烧结性能的影响。结果表明,材料的显微结构变化对机电性能产生重要作用。在烧结过程中,随着PbO分压的增加,改性离子Gb^(?)在钛酸铅晶格中的取代位置很可能发生变化,部分Gd^(3+)离子将由A位取代变为B位取代,这将导致晶格四方性的增大和烧结性能恶化。
The influences of excess PbO on the piezoelectric and dielectric properties of PbTiC_3^- based piezoelectric ceramics, which depends on the microstructrual development have been investigated. The result shows that with the increase of PbO vapor pressure in sintering process, the distribution of Gd^(3+) in PbTiO_3 lattice will change from A-site to B-site, and it will cause the increase of tetragonality and the decrease of sintering characteristic.
出处
《功能材料》
EI
CAS
CSCD
1993年第6期533-536,共4页
Journal of Functional Materials
关键词
改性钛酸铅
压电陶瓷
氧化铅
性能
PbTiO_3-based piezoelectric ceramics
PbO
piezoelectric and dielectric properties
microstructure
