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掺杂对宽带激光烧结BaTiO3陶瓷组织与性能的影响

Effect of Doping on Microstructure and Properties of BaTiO3 Ceramics Sintered by Wide-Band Laser

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摘要

为了获得组织与性能优良的BaTiO3陶瓷,采用宽带激光烧结技术制备了掺杂碱金属离子(Ca2+)和稀土元素离子(Y3+)的BaTiO3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BaTiO3陶瓷进行了组织与性能表征。实验结果表明,Ca2+ 的掺杂抑制了陶瓷晶粒长大,改善了BaTiO3的温度稳定性,防止六方相的生成,提高BaTiO3的居里点;Y3+的掺杂使BaTiO3陶瓷组织致密,降低了BaTiO3陶瓷的室温电阻率并使BaTiO3半导体化。

Abstract

To obtain barium titanate ceramics with excellent microstructure and properties, barium titanate ceramics doping alkali metals ion Ca2+ and the rare-earth Y3+ 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 Ca2+ 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 Y3+ 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.

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中图分类号:TG156.99;TQ174

DOI:10.3788/cjl20093609.2409

所属栏目:材料与薄膜

基金项目: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。

收稿日期:2008-10-06

修改稿日期:2008-11-27

网络出版日期:0001-01-01

作者单位    点击查看

刘其斌:贵州大学材料学院, 贵州 贵阳 550003贵州大学材料结构与强度贵州省重点实验室, 贵州 贵阳 550003
曲微:贵州大学材料学院, 贵州 贵阳 550003

联系人作者:刘其斌(qbliu2@263.net)

备注:刘其斌|教授|长期从事激光材料加工的教学和科研等方面的工作|(1965-),男,侗族,博士。

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