锶受主掺杂对TiO_2压敏陶瓷电性能的影响  

Effect of Sr acceptor dopant on electrical properties of TiO_2 varistor ceramics

作　　者：陈家才[1] 甘国友[2] 严继康[2] 张小文[3] 孙加林 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]昆明理工大学材料与冶金工程学院,云南昆明650093 [3]昆明物理研究所,云南昆明650223 [4]云南省科学技术协会,云南昆明650021

出　　处：《电子元件与材料》2007年第5期21-24,共4页Electronic Components And Materials

基　　金：云南省科技攻关资助项目(2002GG09)

摘　　要：采用典型的电子陶瓷工艺,制备了不同SrCO3含量掺杂的TiO2压敏陶瓷。通过对试样的压敏特性、电容特性的测试,研究了不同SrCO3含量对TiO2压敏陶瓷电性能的影响。结果表明,随着掺入SrCO3含量的变化,TiO2压敏陶瓷的电性能呈现一定的变化规律。当x(SrCO3)为0.5%时,试样表现出最好的压敏特性:V1mA为7.2 V/mm,α为3.6,εr为8.3×104,tanδ为0.53。Based on the typical electroceramic process, TiO2 varistor ceramics doped with various SrCO3 content were fabricated. The electrical properties of the doped TiO2 varistor ceramics with various SrCO3 content were investigated by measuring the properties of varistor and electric capacity. It is found that the electrical properties of the samples showed definite regularity when the SrCO3 content altered. An optimal composition doped with SrCO3 in a mole fraction of 0.5 % exhibits VlmA of 7.2 V/mm, α of 3.6, εr of 8.3× 10^4 and tan δ of 0.53.

关 键 词：电子技术 TIO2压敏陶瓷 非线性系数 相对介电常数 掺锶 

分 类 号：TN304[电子电信—物理电子学]