摘要
在合成的（Ｂａ０．６５Ｐｂ０．３５）ＴｉＯ３中分别掺入了Ａｌ２Ｏ３，ＳｉＯ２，Ｌａ２Ｏ３，ＭｎＯ２和ＴｉＯ２．讨论了每种掺杂物与烧成气氛和升温制度对常温电阻率的影响，找出了ＰＴＣ陶瓷的最佳组成；１ｍｏｌ（Ｂａ０．６５Ｐｂ０．３５）ＴｉＯ３，０．００２ｍｏｌＡｌ２Ｏ３，０．００４ｍｏｌＳｉＯ２，０．０１ｍｏｌＴｉＯ２，０．００３ｍｏｌＬａ２Ｏ３，０．０００２ｍｏｌＭｎＯ２．这种ＰＴＣ陶瓷的表面温度为２７０℃，常温电阻率为５～８×１０３Ω·ｃｍ，时任性为２４０ｖ／ｍｍ．
Al2O3,SiO2,La2O3, MnO2 and TiO2 were doped into the synthetic(Ba0.65Pb0.35)Tio3.The effects of every doped material,firing atmosphere and firing temperature on the resistivity at room temperature were discussed. The optimum formula of the PTC ceramic was obtained. It consists of 1 mol(Ba0.65Pb0.35)TiO3, 0.002 mol Al2O3, 0. 004 mol SiO2, 0. 01 mol TiO2, 0. 003 mol La2O3, 0. 0002 mol MnO2. This PTC Ceramic has following properties: the surface temperature is 270℃,the resistivity at room temperature is 5～8×10Ωcm,the resistance to voltage is 240v/mm.
出处
《河北陶瓷》
1994年第2期18-21,共4页
Hebei Ceramics
关键词
PTC
陶瓷
电阻率
钛酸钡铅系
掺杂
Ba_(0.65) Pb_(0. 35))TiO_3, Al_2O_3 doped,SiO_2 doped,La_2O_3 doped,MnO_2 doped, TiO_2 dope. resistivity at room temperature
