Initial Sintering Mechanism of Fine Zirconia Particles with Added Alumina
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- MATSUI Koji
- Tosoh Corporation, Synthetic Chemicals Production, JAPAN
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- OHMICHI Nobukatsu
- Tosoh Corporation, Synthetic Chemicals Production, JAPAN
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- OHGAI Michiharu
- Tosoh Corporation, Synthetic Chemicals Production, JAPAN
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- YAMAKAWA Takanori
- Kyushu University, Faculty of Engineering, Department of Applied Chemistry, JAPAN
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- UEHARA Masato
- Kyushu University, Faculty of Engineering, Department of Applied Chemistry, JAPAN
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- ENOMOTO Naoya
- Kyushu University, Faculty of Engineering, Department of Applied Chemistry, JAPAN
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- HOJO Junichi
- Kyushu University, Faculty of Engineering, Department of Applied Chemistry, JAPAN
説明
The sinterabilities of fine zirconia powders including 5mass% Y2O3 were investigated with emphasis on the effect of Al2O3 addition on densification at the initial stage. The powders were pressed into disks and sintered at 1100-1500°C. When a small amount of Al2O3 was added, high-density sintered bodies were obtained at a low temperature. The shrinkage of powder compact in the course of heating was measured by a dilatometric method, indicating that the addition of Al2O3 increased the densification rate with elevating temperature. The activation energies of sintering were determined by analyzing the densification curves. The activation energy at the initial sintering stage decreased by Al2O3 addition. The analysis of isothermal shrinkage curves exhibited that the diffusion mechanism changed from grain-boundary to volume diffusions by addition of Al2O3. It is concluded that the Al2O3 addition enhanced the densification because of decreasing the activation energy of volume diffusion at the initial sintering stage.
収録刊行物
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- 日本セラミックス協会 年会・秋季シンポジウム 講演予稿集
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日本セラミックス協会 年会・秋季シンポジウム 講演予稿集 2003F (0), 239-239, 2003
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680589106944
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- NII論文ID
- 130006968361
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可