%0 Journal Article
%T Effects of Sm2O3 Doping on Structure and Electric Characteristics of BaTiO3 Ceramics<br>Sm2O3掺杂BaTiO3陶瓷的结构与电性能研究
%A HAO Su-E
%A WEI Yong-De
%A <br>郝素娥
%A 韦永德
%J 无机材料学报
%D 2003
%I Science Press
%X 采用溶胶-凝胶法制备了掺杂不同浓度Sm2O3(分别为0.001,0.002,0.003,0.005,0.007mol)的BaTiO3陶瓷,并对其结构与电性能进行了研究.结果表明:Sm2O3掺杂BaTiO3陶瓷的晶型在室温下为四方相,而且随着Sm2O3掺杂浓度的增加,BaTiO3陶瓷的晶粒尺寸变小,说明Sm2O3掺杂对BaTiO3陶瓷晶粒的生长有一定的抑制作用;Sm2O3掺杂BaTiO3陶瓷的电阻率比纯BaTiO3陶瓷明显下降,当添加量为0.001mol时,电阻率最小,.从4.3×109Ω·m下降为6.536×103Ω·m;Sm2O3掺杂BaTiO3陶瓷的晶粒电阻随着温度的变化,呈现NTC效应,而晶界电阻随着温度的变化,呈现PTC效应,且晶界电阻远远大于晶粒电阻,说明该材料的PTC效应是由晶界效应引起的.
%K BaTiO3
%K Sm2O3 dopant
%K electric characteristics
%K sol-gel<br>BaTiO3
%K Sm2O3掺杂
%K 电性能
%K 溶胶-凝胶法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=3E8D44D165C35422&yid=D43C4A19B2EE3C0A&vid=13553B2D12F347E8&iid=94C357A881DFC066&sid=81A5772701933E75&eid=F79A45851FD04E0C&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=3&reference_num=8