液相掺杂PTC瓷粉的制备及其电性能研讨.pdf

142 材料工程／2008年lo期 液相掺杂PTC瓷粉的制备及其电性能研究 Electical and ofPTCCeramics PropertyPreparation Mixes Liquid Synthesizedby 丁士文，程昀，王静 (河北大学化学岛环境科学学院，河蔓|：保定071002) DING Shi—wen，CKENGYun，’矿ANG Jing of andEnvironmental Science，Hebei (CollegeChemistry University，Baoding 襁分析证明，产晶为纛方晶系的完全互溶取代固溶体。TEM程镜形貌分祈，靛乎分布较均匀，基本呈规则球形，粒径大 得到了室温电阻37．09D左右，升熙比达到2．957×105，电阻温度系数a为23．36％的性质优良的PTC陶瓷材料。 关饕溺：羝渥嚣态爱疲；纳寒教酸壤瓷耪；烧结条俸 中圈分类号：0611．4文献标识码：A 文章编号：1001-4381(2008)10-0142-03 Abstract：Aseriesof solidsolutionswere solid-state nano—Bao．93一：Y。Sro．07 synthesizedby MnyTil--y03 reactionatlOW thatthe demonstrated were misciblein temperature。XRDpattern compoundsmutually thesolidsolutions．TheTEM showedthatthe hada of photograph compounds uniform，sub- shape withan sizeof70nmindiameter．ThePTCeffectofthe stantiallysphericalparticles averagepartical materialswerestudied ceramics．Itwasfoundthattheresistanceisnear37．09natroom bypreparing 2．957X105 of and coefficientofresistance攫is temprature，ratiolg(又。。／爻。遮)is temperature thecontentofYandMnare1％and 23．36％／℃when 0．04％(mole