摘要
为了提高钛酸钡基陶瓷的击穿强度及降低介电损耗,用传统粉末冶金法制备了BaxSr1-xTiO3陶瓷（x=1,0.7,0.6,0.5,0.4,0.3,0.2,0.1）。X射线衍射（XRD）分析结果表明,随着x的增加,BaxSr1-xTiO3陶瓷的晶胞体积增大。且在室温条件下（约25℃）,当x=1-0.7时其晶体结构为四方相结构,当x=0-0.6时,为立方结构。材料的介电常数及介电损耗随着x的增大而增大;而其频率稳定性则随着x的增大而减小。在Ba0.2S0.8TiO3粉体中以机械混合的方式添加ZnO后,随着ZnO添加量的增加,陶瓷的介电常数、击穿强度都随着增大,而介电损耗则减小,当ZnO的加入量为1.6%（质量分数）时,材料的介电常数和击穿强度达到最大值,而介电损耗最小。
In order to improve the breakdown strength and lower the dielectric loss of BaTiO3（BT） based ceramics, BaxSr1-xTiO3（BST） ceramics with x = 1, 0. 7, 0.6, 0.5, 0.4, 0.3, 0.2 and 0.1 were prepared by traditional powder metallurgy method. The X-ray diffraction （XRD） results indicated that the cell volume increased with the x value increasing and at about 25 ℃ the BST material was tetragonal structure as the x more than 0.7 till to l, but the x was less than 0.7 its structure was cubic and its dielectric con-stant and dielectric loss increased with a rise in x value, at the same time frequency stability lowered. When ZnO was added into Ba0.2Sr0.8TiO3 powder by mechanical milling, the dielectric constant and breakdown strength of Ba0.2Sr0.8TiO3 ceramics were all enhanced, and the dielectric loss dropped down with ZnO concentration increasing. When the addition of ZnO was 1.6% （%, mass fraction）, the dielectric constant and breakdown strength achieved maximum, and the electric loss minimum.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2008年第4期463-467,共5页
Chinese Journal of Rare Metals
基金
国防科工委民口配套项目(JPPT-115-2-1247)
