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›› 2004, Vol. 4 ›› Issue (5): 434-437.

• 过程与工艺 • 上一篇    下一篇

共沉淀法制备钡铁氧体

龙春泉,刘颖,余智勇   

  1. 北京理工大学
  • 出版日期:2004-10-20 发布日期:2004-10-20

Preparation of Ba-Ferrite by Co-precipitation Method

LONG Chun-quan,LIU Ying,YU Zhi-yong   

  1. School of Materials, Beijing Institute of Technology
  • Online:2004-10-20 Published:2004-10-20

摘要: 为了改善传统工艺呈胶状的共沉淀物难以过滤、清洗、干燥的不足,利用Fe3O4的磁性,改进了共沉淀法制备钡铁氧体前驱粉的工艺,节省了时间和成本,并且降低了高温固相反应温度;同时研究了高温固相反应中助熔剂对钡铁氧体粒子粒径、形貌及磁性能的影响,初步确定了助熔剂NaCl的添加量.

关键词: 钡铁氧体(BaFe12O19), 共沉淀法, 助熔剂, 高温固相反应, 前驱粉

Abstract: For ameliorating the insufficiency of filtrating and washing of traditional techniques in preparation of Ba-ferrite by co-precipitation, fine particles of BaFe12O19 in co-precipitation method have been improved by utilizing the magnetism of Fe3O4, consequently preparation time and cost can be saved, and the necessary temperature for the high-temperature solid reaction lowered. Furthermore, the effect of NaCl flux on particle size, morphology and magnetic performance of fine powder of BaFe12O19 was also studied, and appropriate amount of the flux addition determined.

Key words: Ba-ferrite(BaFe12O19), co-precipitation, flux, solid reaction, precursor fine particles