발간논문

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Vol.27, No.12, 1043 ~ 1051, 1989
Title
The Effect of Abnormal Grain Growth on the Magnetic Properties of Sr - ferrite
이우영W . Y . Lee, 김동엽D . Y . Kim, 정원용W . Y . Chung, 오재현J . H . Oh
Abstract
The abnormal grain growth and magnetic properties of Borax doped Sr-ferrite magnet were investigated. The cause and effect of abnormal grain growth in sintered Sr-ferrite ware examined by magnetic property measurement and microstructure observation. During sintering of Sr-ferrite, the addition of Borax and excess SrO causes the liquid please to form. This liquid phase promoted the abnormal grain growth. When the abnormal grain growth occurs, the remanence and the preferred orientation increase but the coercivity decreases sharply. The sintering must be finished before the abnormal grain growth happens.
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