Effects of Rare Earth Oxides on the Microstructure and the Mechanical Properties of High-Purity Alumina Ceramics Sintered at Low Temperature

机译：稀土氧化物对低温烧结高纯氧化铝陶瓷微观结构及力学性能的影响

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High-purity alumina ceramics were prepared by sintering at low temperature, using rare earth oxide Y_2O_3 and Tm_2O_3 as sintering aids. Adding the mixture of Y_2O_3 and Tm_2O_3 in the alumina powders can effectively improve the sintering ability and mechanical properties. The mixture, Y_2O_3+Tm_2O_3, can restrain the grains growth, fine the grain size, make the grain uniform and finally help to form compact structure. The transgranular fracture was the main fracture mode. It was found the relative density of alumina ceramics with 0.3wt% Y_2O_3 and Tm_2O_3, sintered at 1620°C for 3hrs, can be over 99.2% and the strength, toughness and microhardness reach 533.1MPa, 4.9MPa·m~(1/2) and 17.2GPa, respectively.

机译：通过在低温下烧结，使用稀土氧化物Y_2O_3和TM_2O_3作为烧结助剂来制备高纯度氧化铝陶瓷。在氧化铝粉末中加入Y_2O_3和TM_2O_3的混合物可以有效地改善烧结能力和机械性能。混合物Y_2O_3 + TM_2O_3，可以抑制晶粒生长，细粒尺寸，使晶粒均匀，最后有助于形成紧凑的结构。肾小瓣骨折是主要的骨折模式。发现氧化铝陶瓷的相对密度为0.3wt％的Y_2O_3和TM_2O_3，在1620℃下烧结3小时，可以超过99.2％，强度，韧性和微硬度达到533.1MPa，4.9mpa·m〜（1/2分别为17.2gPA。

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《China International Conference on High-Performance Ceramics》|2008年||共2页
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Feng Sun; Ting-yan Tian; Wei-ru Zhang; Bo Chen;
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中图分类玻璃、陶瓷;
关键词
alumina; rare earth oxide; sintering; microstructure;

机译：氧化铝;稀土氧化物;烧结;微观结构;

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1. Effects of Rare Earth Oxides on the Microstructure and the Mechanical Properties of High-Purity Alumina Ceramics Sintered at Low Temperature [J] . Feng Sun, Ting-yan Tian, Wei-ru Zhang, Key Engineering Materials . 2008,第pa1期

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4. Effects of Rare Earth Oxides on the Microstructure and the Mechanical Properties of High-Purity Alumina Ceramics Sintered at Low Temperature [C] . Feng Sun, Ting-yan Tian, Wei-ru Zhang, China International Conference on High-Performance Ceramics . 2008

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Effects of Rare Earth Oxides on the Microstructure and the Mechanical Properties of High-Purity Alumina Ceramics Sintered at Low Temperature

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