| Project/Area Number |
10650319
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Meiji University |
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Principal Investigator |
YAMAMOTO Hiroshi School of Science & Technology, Professor, 理工学部, 教授 (30061972)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1999: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Mechanical Compunding Method / Sr-M ferrite / Fine particles / Magnetic properties / LaィイD22ィエD2OィイD23ィエD2 and CoィイD23ィエD2OィイD24ィエD2 addition / Anisotropic sinterd magnets / メカニカルコンパウンディング法 / La_2O_3とCo_3O_4の添加 / La_2O_3添加 |
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| Research Abstract |
Sr-La-Co M-type ferrite fine particles were prepared by mechanical compounding method using the planetary ball-mill and subsequent heat treatment. This experiment was carried out to investigate the magnetic properties of Sr-La Co M-Type ferrite fine particles prepared by mechanical compounding and anisotropic sintered magnets. The optimum condition of making Sr-La Co M-Type ferrite fine particles and anisotropic sintered magnets used this fine particles, and some properties of typical specimens are as follows ; chemical composition : Sr・6.3FeィイD22ィエD2 OィイD23ィエD2 ; additives : 2wt%LaィイD22ィエD2OィイD23ィエD2 and 0.3wt%CoィイD23ィエD2OィイD24ィエD2 ; planetary ball-mill condition : 300rpm × 1h ; heat treatment condition : 1100℃×1h in air ; magnetic properties are σィイD2sィエD2=86.5×10ィイD1-6ィエD1Wb・m/kg, HィイD2cJィエD2=488 kA/m,. TィイD2cィエD2=453.1℃. The value of (BH)ィイD2maxィエD2 of anisotropic sintered magnets used these Sr-La-Co M-type ferrite particles was obtained more than 32kJ/mィイD13ィエD1.
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