Effects of Sintering Temperature and Bi2O3 Doping on Li Volatilization in LiZn Ferrites

摘要：

LiZn ferrites (LZFs) with composition of Li0.35Zn0.3Fe2.35O4 were prepared using a conventional mixed oxide processing route, and the LZFs doped with 0.0～3.0 wt ％ Bi2O3 were sintered in air at 1000～1160℃ for 3 h. Magnetic properties, Li volatilization and microstructures were investigated,respectively. 4πMS and He can be improved greatly by doping Bi2O3 sintered at 1000～1050 ℃ because liquid-phase Bi2O3 promotes sintering reaction and crystal growth. Li in undoped LZFs volatilizes above 1000℃ and volatilizes fast at 1050-1100℃ then slowly with increase sintering temperature. The value of Li volatilization reaches about 10 wt ％ at 1160℃, however, Li volatilization can be effectively restrained by Bi2O3. Sintered at 1100℃, the value of Li volatilization decreases obviously with the increase in Bi203,especially at 0.5 wt ％ ～ 1.0 wt ％, and Li volatilizes slowly when the concentration of Bi2O3 exceeds 1.0 wt％. The value of Li volatilization decreases from 8.0 wt ％ to 1.0 wt％ by doping 3.0 wt ％ Bi2O3 because the liquid-phase Bi2O3 acts as a buffer and restrains Li volatilization during the sintering process.

关键词： LiZn ferrites sintering temperature Bi203 Li volatilization microstructure

作者: X.N.Jiang Z.W.Lan Z.Yu P.Y.Liu Y.M.Zhuang C.Y.Liu

作者单位: State Key Laboratory of Electronic Thin Films and Integrated Devices.University of Electronic Science and Technology of China,Chengdu 610054,Sichuan,China

会议类型: 国际会议

会议名称: The 10th International Conference on Ferrites(2008中国国际铁氧体研讨会)

会议地点: 成都

会议语种:英文

页码: 364-367

在线出版日期: 2008-10-10（万方平台首次上网日期，不代表论文的发表时间）