正交设计制备LaAlO_3-SrTiO_3介质陶瓷  

Orthogonal Design for LaAlO_3-SrTiO_3 dielectric ceramics

作　　者：吴坚强[1] 吴迪[2] 王群[1] 赵乐晨[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院江西省先进陶瓷材料重点实验室,江西景德镇333001 [2]东南大学,江苏南京210096

出　　处：《陶瓷学报》2012年第3期310-314,共5页Journal of Ceramics

基　　金：江西省教育厅科研项目;赣教发计字(编号:GJJ10570)

摘　　要：以LaAlO3-SrTiO3系介质陶瓷为基础,通过正交实验研究了SiO2、MnCO3、CeO2和Pr6O11的添加量对该系统陶瓷性能的影响,制备出LaAlO3-SrTiO3系介质陶瓷材料。XRD结果表明,所制陶瓷主晶相是LaAlO3-SrTiO3,未发现新相,这些添加物起了促进烧结、降低烧结温度的作用。正交实验结果表明,最佳添加量摩尔分数分别是x(SiO2)为0.4,x(MnCO3)为0.15,x(CeO2)为0.5和x(Pr6O11)为0.05,其相对介电常数εr为38.54,tanδ为1.28×10-4,温度系数αc为-18×10-6/℃。Based on LaAIO3-SrTiO3 system dielectric ceramics,the effect of the additive of SiO2 YlnCO31CeO2 and Pr60, on the performance of this system ceramic were studied by the orthogonal experiment. The LaAIO3-SrTiO3 system dielectric ceramics was prepared. The result of XRD indicated that,the main crystalline phase of the prepared ceramics is LaAIO3 and SrTiO3, new phases are not discovered, and the additive form the eutectic species to lower the sintering temperature. The result of the orthogonal experiment indicated that the optimal content of SiO2, MnCO3, CeO2, Pr6Ol1are 0.4,0.15,0.5 and 0.05 （molar fraction） separately,and the optimal dielectric properties are obtained： ε1=38.54,tanδ=1.28x104,αc= -18x10-6/℃

关 键 词：介质陶瓷 LaAlO3-SrTiO3 陶瓷 添加剂 正交实验 

分 类 号：TQ174.75[化学工程—陶瓷工业]