凝胶冷冻干燥法制备透明氧化钇陶瓷

doi:10.3724/SP.J.1077.2008.01135

无机材料学报

凝胶冷冻干燥法制备透明氧化钇陶瓷

黄毅华^1,2, 江东亮¹, 张景贤¹, 林庆玲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. 中国科学院研究生院, 北京 100049

收稿日期:2008-01-31 修回日期:2008-05-05 出版日期:2008-11-20 网络出版日期:2008-11-20

Fabrication of Transparent Yttria Ceramics through Gel-freezing Dry Method

HUANG Yi-Hua^1,2, JIANG Dong-Liang¹, ZHANG Jing-Xian¹, LIN Qing-Ling¹

1. The State Key Laboratory of High Performance Ceramics and Superfine Structure, Shanghai Institute of Ceramics, Shanghai 200050, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Received:2008-01-31 Revised:2008-05-05 Published:2008-11-20 Online:2008-11-20

摘要/Abstract

摘要： 采用凝胶冷冻干燥法, 在--50℃、8Pa的真空度下制备了碱式硝酸钇前驱体. 干燥后前驱体呈疏松片状堆积, 比烘箱干燥样品具有更为清晰的轮廓. 经过1100℃煅烧后, 凝胶冷冻干燥处理的粉体具有较细的颗粒, 颗粒尺寸分布均一, 并且具有较大的比表面积. 该粉体经过干压型, 于1700℃真空保温4h烧结后得到晶粒大小均匀的致密多晶透明陶瓷, 平均晶粒尺寸在40μm左右, 样品相对密度达99.6%. 样品经抛光后可见光400nm波长透过率达60%, 并且在紫外波段也具有类似于氧化钇单晶的高透过率.

关键词: 透明陶瓷, 氧化钇粉体, 凝胶冷冻干燥

Abstract: The effect of gel-freezing dry method (--50℃, 8Pa) was investigated on drying and dewatering on a yttrium hydroxynitrate precursor. Precursor through gel-freezing dry accumulated softly with a clearer card-like figure than that through traditional oven dry. After calcination at 1100℃, the powder through gel-freezing dry method has finer particles, narrower particle distribution and larger surface area than that through oven dry. After dry process, samples were sintered at 1700℃ for 4h in vacuum, transparent polycrystalline ceramics were produced with uniform rystallines. The mean size of crystallines is around 40μm. Relative density of the transparent ceramic eaches 99.6%. After milling and polishing, samples get a high in-line transmittance of 60% at 400nm wavelength, and it also gets a high in-line transmittance ultraviolet wave band, which is similar to single crystalline yttrium oxide.

Key words: transparent ceramics, yttria powder, gel-freezing dry

中图分类号:

TF123
TB321

黄毅华,江东亮,张景贤,林庆玲. 凝胶冷冻干燥法制备透明氧化钇陶瓷[J]. 无机材料学报, DOI: 10.3724/SP.J.1077.2008.01135.

HUANG Yi-Hua,JIANG Dong-Liang,ZHANG Jing-Xian,LIN Qing-Ling. Fabrication of Transparent Yttria Ceramics through Gel-freezing Dry Method[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.01135.

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凝胶冷冻干燥法制备透明氧化钇陶瓷

Fabrication of Transparent Yttria Ceramics through Gel-freezing Dry Method

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