摘要
为了获得组织与性能优良的BaTiO_3陶瓷,采用宽带激光烧结技术制备了掺杂碱金属离子(Ca^(2+))和稀土元素离子(Y^(2+))的BaTiO_3陶瓷。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、热重-差热分析(TG-DTA)、TR-8401振簧式静电计对BaTiO_3陶瓷进行了组织与性能表征。实验结果表明,Ca^(2+)的掺杂抑制了陶瓷晶粒长大,改善了BaTiO_3的温度稳定性,防止六方相的生成,提高BaTiO_3的居里点;Y^(3+)的掺杂使BaTiO_3陶瓷组织致密,降低了BaTiO_3陶瓷的室温电阻率并使BaTiO_3半导体化。
To obtain barium titanate ceramics with excellenl： microstructure and properties, barium titanate ceramics doping alkali metals ion Ca^2＋ and the rare-earth y^3＋ is synthesized by wide-band laser sintering. By means of scanning electron micrscope （SEM）, X-ray diffraction （XRD）, thermogravimetry-differential thermalanalysis （TG- DTA） and TR-8401 static-of-spring, the microstructure and properties of barium titanate ceramics are characterized. The experimental results show that Ca^2＋ doped into ceramics, restrains the growth of grain size, improves temperature stability of barium titanate ceramics, prevents the hexagonal phase barium titanate and improves the curie temperature of barium titanate ceramics, while Y^3＋ doped into ceramics, makes the microstructure of barium titanate ceramics be compacted, the room temperature resistivity of barium titanate ceramics be decreased and barium titanate ceramics have characteristics of semiconductor.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2009年第9期2409-2412,共4页
Chinese Journal of Lasers
基金
贵州省省长基金(黔科教办2008-04)
贵州大学大学生创新性实验计划项目(贵大创字2007-129)资助课题
关键词
材料
BATIO3陶瓷
组织
性能
宽带激光烧结
掺杂
materials
BaTiO3 ceramics
microstructure
properties
wide-band laser sintering
doping
