掺杂对宽带激光烧结BaTiO<sub>3</sub>陶瓷组织与性能的影响

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.

参考文献

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刘其斌, 曲微. 掺杂对宽带激光烧结BaTiO₃陶瓷组织与性能的影响[J]. 中国激光, 2009, 36(9): 2409. Liu Qibin, Qu Wei. Effect of Doping on Microstructure and Properties of BaTiO₃ Ceramics Sintered by Wide-Band Laser[J]. Chinese Journal of Lasers, 2009, 36(9): 2409.

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