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材料研究学报  2009, Vol. 23 Issue (5): 534-540    
  研究论文 本期目录 | 过刊浏览 |
CuO--TiO2复合助剂低温烧结氧化铝陶瓷的机理(I)
张斌1;  王焕平1; 马红萍2;  徐时清1;  李登豪1;  周广淼1
1.中国计量学院材料科学与工程学院 杭州 310018
2.浙江科技学院机械与汽车工程学院 杭州 310012
Mechanism of lowering the sintering temperature of Al2O3 ceramic by the addition of CuO–TiO2 (I)
ZHANG Bin1;  WANG Huanping1;  MA Hongping2;  XU Shiqing1;  LI Denghao1;  ZHOU Guangmiao1
1.College of Materials Science and Engineering; China Jiliang University; Hangzhou 310018
2.School of Mechanical & Automotive Engineering; Zhejiang University of Science and Technology; Hangzhou 310012
引用本文:

张斌 王焕平 马红萍 徐时清 李登豪 周广淼. CuO--TiO2复合助剂低温烧结氧化铝陶瓷的机理(I)[J]. 材料研究学报, 2009, 23(5): 534-540.
, , . Mechanism of lowering the sintering temperature of Al2O3 ceramic by the addition of CuO–TiO2 (I)[J]. Chin J Mater Res, 2009, 23(5): 534-540.

全文: PDF(1289 KB)  
摘要: 

向氧化铝陶瓷中添加总量固定、但m(CuO)/m(TiO2)不同的CuO--TiO2复合助剂, 研究其对氧化铝陶瓷烧结性能、微观结构以及物相组成的影响, 揭示复合助剂的低温烧结机理. 结果表明, CuO与TiO2不易发生化合反应, 分别以液相烧结和固相反应烧结来促进氧化铝陶瓷的致密化进程; TiO2与AL2O3反应生成A12Ti7O15的固相烧结, 比CuO的液相烧结更能有效地促进陶瓷的晶粒生长与致密化. 在TiO2固相烧结的基础上适当引入CuO液相, 能够最大程度地降低氧化铝陶瓷的烧结温度; 当在50 g Al2O3粉体中添加总量为0.025 mol的CuO--TiO2复合助剂, 并使m(TiO2)/m(CuO+TiO2)为0.80时, 氧化铝陶瓷在1250 ℃烧结后其密度达到理论密度的98%以上.

关键词 无机非金属材料 氧化铝 烧结助剂 液相烧结 固相反应烧结    
Abstract

The effects of CuO and TiO2 additives on the sintering behavior, microstructure, phase composition and the mechanism of lowering the sintering temperature of Al2O3 ceramics have been investigated. It was difficult to take place for the combination reaction between CuO and TiO2, and the sintering densification of alumina ceramic was greatly enhanced by the addition of CuO as a liquid phase sintering aid and TiO2 as a solid–state reaction sintering aid. The reaction between TiO2 and Al2O3 resulted in the solid–state reaction sintering process, which was more effective to lower the sintering temperature of Al2O3 ceramic than the liquid phase sintering process by the addition of CuO. Adding 0.025 mol CuO–TiO2 (the molar ratio of TiO2 to CuO–TiO2 was 0.80) into 50 g Al2O3 powders, the alumina ceramic achieved compact structure at 1250   and reached above 98% of the theoretical density.

Key wordsinorganic non–metallic materials    Al2O3    sintering additive    liquid phase sintering    solid–state reaction sintering
收稿日期: 2009-02-18     
ZTFLH: 

TQ174

 
基金资助:

 教育部新世纪优秀人才支持计划NCET--07--0786、浙江省科技计划2008C21053, 2008C21054资助项目.

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