学术
La2O3对氧化铝透明陶瓷显微结构和透光性能的影响
杨秋红[1] 曾智江[1] 徐军[2] 张红伟[1] 丁君[1]
[1]上海大学材料科学与工程学院,上海200072 [2]中国科学院上海光学精密机械研究所,上海201800
摘 要:
采用传统无压烧结工艺在氢气氛下制备Al2O3透明陶瓷。实验结果表明：MgO和La2O3复合添加时，随着La2O3掺杂量的增加体积密度总体上保持上升的趋势。随着保温时间的延长，陶瓷的致密化程度增大，残余气孔逐步排出，晶粒进一步长大。采用La2O3和MgO复合添加比单独掺入MgO陶瓷样品透过率更高，掺杂效果更好。在烧结温度为1750℃，保温时问为1h条件下，在波艮为300～800nm测试范围内，陶瓷样品的全透过率大于82％，最大值为86％。[著者文摘]
文章出处:
《中国稀土学报》-2005年23卷6期 -713-716页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-4343（2005）06-0713-04
Effect of La2O3 on Microstructure and Transmittance of Transparent Alumina Ceramics
Yang Qiuhong , Zeng Zhijiang, Xu Jun, Zhang Hongwei, Ding Jun（ 1. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China; 2. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China ）
Abstract:
Optically transparent alumina ceramics were fabricated by conventional process and sintered without pressure in H2 atmosphere. The results indicate that relative density of alumina increases to theoretical density with the increase of La2O3 amounts. With extending the sintering holding time, there are much fewer pores and bigger grains in the sintered alumina samples. Higher transmittance is achieved in alumina doped with MgO and La2O3 as compared with that just doped with MgO. The total-transmittance of alumina sample is up to 86% in the wavelength range of 300 ～ 800 nm.[著者文摘]
Key words:
inorganic nonmetallic materials; alumina; transparent ceramics; microstructure; La2O3; rare earths
基金资助:
国家自然科学基金资助项目（60578041）
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