YAG陶瓷正畸托槽的制备研究.doc

文档介绍：
YAG 陶瓷正畸托槽的制备研究#
张伟1,卢铁城1,2,卢忠文1,陈兴涛1,关永兵1,魏念1,韦建军1,齐建起1**
(1. 四川大学物理系和辐射物理及技术教育部重点实验室,四川成都 610064;
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2. 四川大学高能量密度物理及技术教育部重点实验室,四川成都 610064)
摘要:以 Y(NO3)3·6H2O、Al(NO3)3·9H2O 为原料,NH4HCO3 为沉淀剂,采用改进的共沉淀
法合成 YAG 前驱体,经 1100℃煅烧 2 小时得到高活性、分散性好的 YAG 纳米粉体,然后
添加 .% TEOS 和 .% MgO 作为烧结助剂,经注浆成型,采用两步真空烧结得到
YAG 透明陶瓷托槽。通过 XRD 和 SEM 对粉体和陶瓷托槽进行了表征。结果表明:所制得
的 YAG 陶瓷托槽致密度高,气孔含量极低,平均晶粒尺寸约 3 µm。
关键词:陶瓷;YAG 陶瓷托槽;共沉淀法;烧结助剂;两步真空烧结法
中图分类号:TQ174
Fabrication of YAG ceramics orthodontic brackets
ZHANG Wei1, LU Tiecheng1,2, LU Zhongwen1, CHEN Xingtao1, GUAN
Yongbin1,
WEI Nian1, WEI Jianjun1, QI Jianqi1
(1. Department of Physics and key Laboratory of Radiation Physics and Technology of Ministry
of Education , Sichuan University,Sichuan Chengdu 610064;
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2. Key Laboratory of High Energy Density Physics and Technology, Ministry of Education,
Sichuan University, Sichuan Chengdu 610064)
Abstract: In this paper,YAG powders were prepared by modfied co-precipitation method. YAG
precursor was prepared by modfied co-precipitation method using Y(NO3)3·6H2O,
Al(NO3)3·9H2O and NH4HCO3 as starting materials. Nanometer YAG powders with good sinter
ability were obtained by calcinating the precursor at 1100℃ for 2 h. With the addition of .%
TEOS and .% MgO as sintering assistants, high-quality YAG ceramic brackets were
fabricated by two-step vacuu