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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Bi2O3对烧结LiZn铁氧体性能的影响

余忠, 陈代中, 兰中文, 蒋晓娜, 刘保元   

  1. 电子科技大学电子薄膜与集成器件国家重点实验室, 成都 610054
  • 收稿日期:2006-10-18 修回日期:2006-12-12 出版日期:2007-11-20 网络出版日期:2007-11-20

Effect of Bi2O3 on Properties of Lithium-Zinc Ferrite

YU Zhong, CHEN Dai-Zhong, LAN Zhong-Wen, JIANG Xiao-Na, LIU Bao-Yuan   

  1. State Key Lab of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2006-10-18 Revised:2006-12-12 Published:2007-11-20 Online:2007-11-20

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摘要： 采用氧化物陶瓷工艺制备了掺Bi2O3的Li 0.4 Zn 0.2 Fe 2.4 O 4铁氧体. 用XRD、SEM、密度测试和磁性能表征, 研究了Bi2O3对LiZn铁氧体性能的影响. 结果表明: Bi2O3能有效抑制烧结过程中的锂挥发, 促进固相反应, 降低烧结温度, 但过多的Bi2O3会阻止晶粒生长; 适量掺杂Bi2O3可以提高LiZn铁氧体的饱和磁感应强度和矩形比, 降低铁氧体的矫顽力.

关键词: LiZn铁氧体, 掺Bi2O3, 晶粒生长, 锂挥发

Abstract: The lithium-zinc ferrite doped with Bi2O3 was prepared by the conventional oxide ceramic process. The effect of Bi2O3 on properties of lithium-zinc ferrite was investigated by means of characterizing the phase component and fracture surface micrograph by X-ray diffraction (XRD) and scanning electron microscope (SEM), density by Archimedean method, and magnetic properties by B-H analyzer. The results show that Bi2O3 can effectively bate the volatilization of lithium, promote solid state reaction and decrease the sintering temperature, but excessive Bi2O3 can restrain the crystal grain growth during sintering process. An optimal amount of Bi2O3 is beneficial to increase the saturation magnetic induction Bs and squareness Br/Bs, and decrease the coercive force Hc of lithium-zinc ferrite.

Key words: lithium-zinc ferrite, Bi2O3-dope, crystal grain growth, lithium-volatilization

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