(Ta_2O_5)_(1-x)(TiO_2)_x基陶瓷介电温度系数激光热补偿改性研究  

Study of Dielectric Temperature Coefficient of (Ta_2O_5)_(1-x)(TiO_2)_x Based Ceramics Modified by Laser Thermal Compensation

作　　者：王宝军[1] 季凌飞[1] 蒋毅坚[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100022

出　　处：《中国激光》2009年第9期2413-2416,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(10674041;50875006);北京市科委科技新星项目(2006B11);北京市教委面上项目(KM200810005006);北京市人才强教一拔尖创新人才项目(05313999200601)资助课题

摘　　要：简要介绍了(Ta_2O_5)_(1-x)(TiO_2),基陶瓷(x分别为0.3,0.4和0.5)的激光烧结技术。提出激光烧结和氧气退火相结合可以实现(Ta_2O_5)_(1-x)(TiO_2)基负温度系数材料的热补偿,使其介电温度系数接近零。采用X射线衍射仪(XRD)与扫描电子显微镜(SEM)分析了炉烧样品、激光烧样品及其退火样品的介电性能。实现热补偿与氧缺位的变化有关,从而导致其温度系数的变化。Laser sinter technique for （TaxO5）1-x（TiO2）x（x is 0.3, 0.4 and 0.5, respectively） based ceramics was briefly introduced in this paper. Thermal compensation of （Ta2O5）1 , （TiO2）, based negative temperature coefficient materials could be allowed by combination of laser sinter and annealing in oxygen, which tuned their dielectric temperature coefficient nearly to zero. Dielectric properties of specimens prepared by conventional sintering, laser sintering and its annealing sample in oxygen were analyzed by X-ray diffraction （XRD） and scanning electron microscope （SEM）. The results showed that thermal compensation of the negative temperature coefficient materials related to the oxygen defect, and led to the change of their temperature coefficients.

关 键 词：激光技术 陶瓷 负温度系数 激光烧结 退火 

分 类 号：TN249[电子电信—物理电子学]