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| 热压烧结细晶粒氧化铝陶瓷(英文) | |
| 引用本文： | 李江,潘裕柏,刘珏,曾燕萍,郭景坤.热压烧结细晶粒氧化铝陶瓷(英文)[J].硅酸盐学报,2009,37(2). |
| 作者姓名： | 李江 潘裕柏 刘珏 曾燕萍 郭景坤 |
| 作者单位： | 1. 中国科学院上海硅酸盐研究所,上海,200050;中国科学院透明光功能先进无机材料重点实验室,上海,200050 2. 上海大学,上海,200444 3. 中国科学院上海硅酸盐研究所,上海,200050 |
| 基金项目： | 上海市重大基础研究项目，国家高技术研究发展计划(863计划) |
| 摘 要： | 以沉淀法制各的商业α-Al2O3粉体为原料,自制镁铝硅玻璃为烧结助剂,采用热压烧结工艺低温制备高性能氧化铝陶瓷.用Archimedes法、电子探针和三点弯曲法研究了氧化铝陶瓷的致密化行为、显微结构和力学性能.结果表明:在1400℃烧结的氧化铝陶瓷的相对密度高达98.9%,晶粒细小,平均晶粒尺寸约为0.6μm,晶界上有莫来石相析出,样品的抗弯强度和断裂韧性分别达442MPa和4.7MPa·m1/2. |
| 关 键 词： | 氧化铝 热压烧结 镁铝硅玻璃 显微结构 力学性能 |
HOT-PRESSED SINTERING OF FINE-GRAINED ALUMINA CERAMICS |
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| LI Jiang,PAN Yubai,LIU Jue,ZENG Yanping,GUO Jingkun.HOT-PRESSED SINTERING OF FINE-GRAINED ALUMINA CERAMICS[J].Journal of The Chinese Ceramic Society,2009,37(2). | |
| Authors: | LI Jiang PAN Yubai LIU Jue ZENG Yanping GUO Jingkun |
| Affiliation: | 1.Shanghai Institute of Ceramics;Chinese Academy of Sciences;Shanghai 200050;2.Key Laboratory of Transparent and Opt-Functional Advanced Inorganic Materials;3.Shanghai University;Shanghai 200444;China |
| Abstract: | High-quality alumina ceramics were fabricated by hot-pressed sintering using magnesium aluminosilicate (MAS) glass as additive.Commercial α-Al2O3 powder prepared by the precipitation method was used as the raw material.The densification behavior,microstmeture evolution and mechanical properties of the alumina ceramics were studied bv the Archimedes method,electron probe microanalysis and the three-point bending test.The results show that the relative density of the sample sintered at 1400℃ is 98.9%.The grain of this sample is fine and its average grain size is about 0.6 μm.There is precipitated mullite phase at the grain boundary of the sample.The bending strength and the fracture toughness of the sample are 442MPa and 4.7 Mpa·m1/2 respectively. |
| Keywords: | alumina hot-pressed sintering magnesium aluminosilicate glass microstructure mechanical properties |
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