亚微米球形Y2O3粉体及其透明陶瓷的制备
Preparation of Sub-micron Spherical Y2O3 Particles and Transparent Ceramics
刘焱 1覃显鹏 2甘霖 3周国红 2章天金 3王士维 2陈鹤拓2
作者信息
- 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;湖北大学材料科学与工程学院,武汉 430062
- 2. 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
- 3. 湖北大学材料科学与工程学院,武汉 430062
- 折叠
摘要
Y2O3以其优良的物理化学性质和在280 nm～8 pm宽频段内的高透明性,而广泛应用于激光介质或光学窗口等领域.制备高透明的Y2O3陶瓷是目前的研究热点和难点,而高质量的粉体是制备高透明Y2O3陶瓷的关键,尿素均相沉淀法以其爆发成核和均匀可控的阴离子释放机制成为制备单分散颗粒的主要方法.本工作以硝酸钇和尿素为原料,采用尿素均相沉淀法制备了单分散、亚微米级的球形Y2O3粉体.采用不同方法研究了 Y2O3前驱体和煅烧后粉体的结构、物相演变和形貌.前驱体的颗粒尺寸约为330 nm,800 ℃煅烧2 h得到的Y2O3粉体尺寸约为260nm.在800 ℃煅烧后即可得到纯相的Y2O3粉体,粉体呈球形,分散性好,且粒径均匀.以该Y2O3粉体为原料,添加原子分数0.3％的Nb2O5为烧结助剂,在1780 ℃通过真空无压烧结成功制备了透明Y2O3陶瓷.材料的光学性质优良,即样品(厚度1 mm)的直线透过率在1100 nm处达到76.9％,在400 nm处达到65.6％.本工作为制备性能优良的Y2O3透明陶瓷提供了一种新的方法.
Abstract
Y2O3 ceramics is widely used as laser medium or optical window due to its excellent physical and chemical properties and high transparency in wide frequency band of 280 nm-8 pm.However,preparation of highly transparent Y2O3 ceramics still remains challenge due to its synthetic precursor and nano-powders difficult to meet the requirements.In this work,a spherical monodispersed and submicron-sized Y2O3 powder was prepared by a homogeneous precipitation method using yttrium nitrate and urea as raw materials.Structure,phase evolution and morphology of Y2O3 precursor and the calcined powder were studied by different methods.The synthesized particle precursor exhibits a sphere morphology with diamension around 330 nm,and Y2O3 powder calcined at 800 ℃ for 2 h shows spherical,well-dispersed and uniformed particles with dimension around 260 nm.Based on this spherical Y2O3 powder,transparent Y2O3 ceramics were fabricated by vacuum sintering at 1780 ℃ using 0.3％(in atom)Nb2O5 as sintering additive.The in-line transmittances of Y2O3 ceramics with thickness of 1 mm reach 76.9％at a wavelength of 1100 nm and 65.6％at a wavelength of 400 nm.In conclusion,this study provides a new promising method for preparing Y2O3 transparent ceramics with excellent properties.
关键词
尿素均相沉淀法/亚微米球形Y2O3粉体/透明Y2O3陶瓷/Nb2O5/真空烧结Key words
urea homogeneous precipitation method/submicron-sized spherical Y2O3 powder/transparent Y2O3ceramic/Nb2O5/vacuum sintering引用本文复制引用
基金项目
国家自然科学基金(52130207)
国家自然科学基金(51902093)
国家自然科学基金(52103357)
出版年
2024
国家科技期刊平台
NSTL
万方数据