无机材料学报

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多层片式电感器用NiCuZn铁氧体的低温烧结

何新华; 熊茂仁; 凌志远; 丘其春   

  1. 华南理工大学材料学院电子材料科学与工程系; 广州 510641
  • 收稿日期:1998-03-10 修回日期:1998-04-15 出版日期:1999-02-20 网络出版日期:1999-02-20

Low-Temperature Sintering of NiCuZn Ferrite for Multilayer-chip Inductor

HE Xin-Hua; XIONG Mao-Ren; LING Zhi-Yuan; QIU Qi-Chun   

  1. Dept. Elect. Mat. Set. Eng.; College of Materials; South China Univ. Tech.Guangzhou 510641 China
  • Received:1998-03-10 Revised:1998-04-15 Published:1999-02-20 Online:1999-02-20

摘要: 本文利用Bi2O3作为烧结促进剂实现了NiCuZn铁氧体在900℃以下烧结.利用TG、DTA、DDTA等分析手段研究Bi2O3的低温烧结机理,并确定最佳烧结温度范围在840~900℃之间.X-ray分析结果表明:加入Bi2O3后生成另相化合物Bi36Fe2O57烧结后期少量Fe的固溶有助于稳定高温γ-Bi2O3相的立方结构,避免了冷却过程中的晶型转变.Bi36Fe2O57另相的存在能有效地阻止晶粒长大,从而达到改性的目的.

关键词: 多层片式电感器, 铁氧体, NiCuZn系, 低温烧结

Abstract: The sintering below 900"C of NiCuZn ferrite was realized by using Bi2O3 additions. Themechanism of low-temperature sintering was discussed by means of TG,DTA and DDTA. The resultshows the optimum sintering temperature range is 850~ 900℃ and a second phase, Bi36Fe2O57 formed. The solution of Fe is helpful in both stabilizing cubic structure of r-Bi2O3 and keepingaway from crystal transition during cooling. Bi36Fe2O57 prevents grain growth effectively, so thatthe modification of NiCuZn ferrite can be achieved.

Key words: multilayer-chip inductor, ferrite, NiCuZn system, low-temperature sintering

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