埋粉热压后处理制备Nd∶YAG激光陶瓷  

Preparation of Nd∶YAG Transparent Ceramic via Hot Pressing Post-treatment Embedded in BN Powders

作　　者：李兴旺 张月娟 莫小刚 王永国[1,2] 徐学珍[1,2] 刘磊[2] 周寿桓[2] 

机构地区：[1]北京雷生强式科技有限责任公司,北京100015 [2]华北光电技术研究所,北京100015

出　　处：《硅酸盐学报》2014年第6期734-739,共6页Journal of The Chinese Ceramic Society

摘　　要：以市售高纯氧化物粉体为原料,采用固相反应烧结—埋粉热压后处理组合烧结工艺制备了直径为30mm、厚度为3.05mm的Nd3+∶Y3Al5O12(Nd∶YAG)透明陶瓷样品。研究了埋粉热压后处理工艺对Nd∶YAG陶瓷的光学性能、残留应力和光学均匀性等的影响。研究表明,通过将真空烧结后的Nd∶YAG陶瓷埋入BN粉体中进行热压后处理,克服了Nd∶YAG陶瓷在热压过程中容易碎裂及碳污染问题,并进一步排除了Nd∶YAG陶瓷内部的残留气孔,其透过率大于80%。埋粉热压后处理工艺对Nd∶YAG陶瓷的残留应力分布和光学均匀性没有影响。采用光纤耦合808nm激光二极管泵浦Nd∶YAG陶瓷样品,实现了连续瓦级激光输出,最高输出功率为3.6W,光光转换效率为20%。The transparent Nd3＋ ∶ Y3Al5 O12 （Nd∶ YAG） ceramics with the size of 30 mm in diameter and 3.05 mm in thickness were fabricated by a composite sintering method （i.e.,solid state reaction sintering and hot pressing post-treatment embedded in BN powders） with the commercial oxide powders as raw materials.The effect of hot pressing post-treatment embedded in BN powders on the optical properties,residual stress and optical uniformity of Nd∶ YAG ceramics was investigated.The results show that the application of the BN powders can solve the problem of crack and carbon contamination during hot pressing effectively.This method can reduce the residual pores in the ceramic body and improve the transmittance of Nd∶ YAG transparent ceramic.The transmittance of the Nd∶ YAG ceramic obtained is ＞ 80％.The hot pressing post treatment embedded in BN powder has no effect on the residual stress distribution and the optical homogeneity of Nd∶ YAG transparent ceramic.The laser performance of Nd∶ YAG ceramic sample was examined by a fiber-coupled 808 nm LD as a pump.It is indicated that the the CW laser output can be realized,the maximal output power is 3.6 W and the efficiency of optical to optical is 20 ％.

关 键 词：掺钕钇铝石榴石 透明陶瓷 烧结 热压后处理 氮化硼 

分 类 号：TQ174[化学工程—陶瓷工业]