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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

TiO2和MgO微量添加剂对Al2O3陶瓷烧结致密化的影响

王欣1; 王佩玲1; 程一兵2   

  1. 1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050; 2. 澳大利亚Monash大学物理与材料工程学院
  • 收稿日期:2000-09-20 修回日期:2000-12-18 出版日期:2001-09-20 网络出版日期:2001-09-20

Effect of TiO2 and MgO Additions on Microstructures of Al2O3

WANG Xin1; WANG Pei-Ling1; CHENG Yi-Bing 2   

  1. 1.State Key Lab of High Performance Ceramics and Superfine Microstructrue; Shanghai Institute of Ceramics; Shanghai 200050; China; 2.Dept. of Materials Engineering; Monash University Clayton; Victoria 3168; Australia
  • Received:2000-09-20 Revised:2000-12-18 Published:2001-09-20 Online:2001-09-20

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摘要： 通过在氧化铝中添加微量氧化钛和氧化镁，利用无压烧结工艺，制备了具有明显各 向异性晶粒的氧化铝块材．研究了氧化钛、氧化镁的添加量和烧结温度对材料显微结构和致密 度的影响．与单纯添加氧化钛的氧化铝材料相比，氧化镁的加入细化了氧化铝的晶粒．因此， 可以通过调整氧化镁的加入量，在保持氧化铝晶粒各向异性形貌的同时，调整晶粒的尺寸，最 终得到比较均匀的显微结构．

关键词: 氧化铝, 氧化钛, 氧化镁, 显微结构

Abstract: By using pressureless sintering technique, the samples of Al2O3 with anisotropic grains through the doping of small amount of TiO2 and MgO were prepared. The effects of quantity of TiO2 and MgO and sintering temperature on the microstructure of Al2O3 were also investigated. The doping of MgO makes the grains of Al2O3 smaller in contrast to the ones in Al2O3 doped with pure TiO2. It is possible to adjust the aspect ratio of Al2O3 grains and gain a homogeneous microstructure in Al2O3 by means of changing the amount of MgO additions in the material.

Key words: alumina, titania, magnesia, microstructure

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