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冷冻干燥合成ZrO2-(Al2O3,Fe2O3)及其微观组织的变化

李锐星1; 殷澍2; 陈岚1; 喻克宁1; 黎少华1; 梁焕珍1; 佐藤次雄2   

  1. 1. 中国科学院过程工程研究所, 北京 100080; 2. 东北大学多元物质研究所 ; 日本仙台; 80-8577
  • 收稿日期:2002-01-17 修回日期:2002-03-15 出版日期:2003-03-20 网络出版日期:2003-03-20

Microstructure Evolution of ZrO2-(Al2O3, Fe2O3) Materials Synthesized by Frozen-drying

LI Rui-Xing1; YIN Shu2; CHEN Lan1; YU Ke-Ning1; LI Shao-Hua1; LIANG Huan-Zhen1; SATO Tsugio2   

  1. 1.Institute of Process Engineering; CAS; Beijing 100080; China; 2.IMRAM; Tohoku University; Sendai 980-8577; Japan
  • Received:2002-01-17 Revised:2002-03-15 Published:2003-03-20 Online:2003-03-20

摘要: 通过冷冻干燥方法制备了ZrO2-Al2O3,ZrO2-Fe2O3二元及ZrO2·(Al2O3,Fe2O3)三元体系的前驱物粉末,研究了不同温度下的相变及微观组织结构,证明Fe2O3具有球化晶粒的作用,并获得了具有均匀细小显微组织的三元体系.

关键词: 冷冻干燥, 相变, 晶粒度, 复相陶瓷, ZrO2

Abstract: Precursor powders of ZrO2-Al2O3, ZrO2-Fe2O3 and ZrO2-(Al2O3, Fe2O3) systems were produced by frozen-drying. Their phases transformation and microstructure were developed at deferent temperatures and sintering durations. Microstructure with fine grains was obtained in the ZrO2-(Al2O3, Fe2O3) system for the composition (ZrO2:Al2O3:Fe2O3=60:32:8 mol%) sintered at 1400℃ for 15h. The results obtained show that Fe2O3 has the effect of glomeration of grains in ZrO2 base ceramic materials.

Key words: frozen-drying, phases transformation, grains degree, multiphase ceramic, ZrO2

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