| Effect of Aggregates on the Microstructure in Manganese Zinc Ferrite |
| Hyo-Soon Shin, Dae-Hee Lee, Chang-Bum Kim, Nam-Kyung Kim, Suk-Kee Lee1, Byung-Kyo Lee |
Department of Inorganic Materials Engineering, Kyungpook National University
1Department of Polymer Sciences, Kyungpook National University |
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| ABSTRACT |
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To study the effect of aggregates on the microstructure of sintered bodies, Mn-Zn ferrite powders were prepared by an alcoholic dehydration method. Aggregate powders and reground powders were used as seeds and matrices, respectively. The mixing ratios for the aggregate and reground powders were varied with the sintering temperatures. Green densities were measured with changes in forming pressure and they were related to the microstructures of the sintered bodies. The aggregates proved to be capable of acting as seeds for abnormal grain growth. When the green density difference between the aggregate and the matrix was large, the aggregate could become the seed of abnormal grain growth. As the forming pressure increased, the more aggregates became seeds of abnormal grain growth. |
| Key words:
Mn-Zn ferrite, Aggregate, Green density, Microstructure, Abnormal grain growth |
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