INFLUENCE OF Li_2CO_3-SiO_2 ADDITIVE ON THE PROPERTIES AND PROCESSING OF DOUBLE-FUNCTION SrTiO_3-BASED LOW VOLTAGE VARISTOR CERAMICS  

Li_2CO_3-SiO_2掺杂对双功能低压SrTiO_3基压敏陶瓷性能与工艺的影响(英文)

作　　者：季惠明[1] 梁辉[1] 郝俊杰[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《Transactions of Tianjin University》2001年第2期127-131,共5页天津大学学报（英文版）

摘　　要：Semiconducting SrTiO 3 based voltage sensing and dielectric ceramics were prepared by single step sintering with Li 2CO 3 SiO 2 as liquid phase additives.The effects of the content of liquid phase,the ratio of Li/Si and the sintering temperatures on properties were discussed in terms of electrical properties and microstructures of materials.The results showed thatSrTiO 3 based varistor ceramics,with 0.6 mol% Li 2CO 3 SiO 2(Li/Si=3/2) and sintered at 1 380 ℃ in graphite and N 2 reducing atomosphere,had excellent current volatage sensing and dielectric characteristics.以 L i2 CO3-Si O2 为液相掺杂剂 ,采用一次烧成工艺 ,制备出半导体的 Sr Ti O3基压敏与介电性的双功能陶瓷 .通过电性能与微观结构分析 ,研究了液相掺杂浓度、L i/Si比值及烧结温度对材料性能的影响 .结果表明 ,以 6× 10 - 3mol/L的 Li2 CO3+ Si O2 为液相掺杂剂 ,L i/Si=3 /2 ,温度为 13 80℃时 ,在石墨和氮气形成的还原性气氛中烧成的 Sr Ti

关 键 词：SrTiO  3 VARISTOR liquid  phase additive PROPERTY 

分 类 号：TF122.5[冶金工程—粉末冶金]