球磨转速对Nd:YAG透明陶瓷的显微结构及光学性能的影响  

Influence of Ball Milling Speed on Microstructure and Optical Transparency of Nd:YAG Ceramics

作　　者：刘婧[1,2] 刘军[1] 李江[2] 林丽[1,2] 潘裕柏[2] 程晓农[1] 郭景坤[2] 

机构地区：[1]江苏大学材料科学与工程学院,镇江210031 [2]中国科学院上海硅酸盐研究所透明光功能无机材料重点实验室,上海200050

出　　处：《无机材料学报》2015年第6期581-587,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金(50990301;51302298);2013年普通高校研究生科研创新计划项目(CXLX13_650)~~

摘　　要：以高纯商业Y2O3、α-Al2O3和Nd2O3粉体为原料,以TEOS(正硅酸乙酯)和Mg O为烧结助剂,采用固相反应和真空烧结技术制备了1.0at%Nd:YAG透明陶瓷。系统研究了球磨转速(球磨时间10 h)对混合粉体的尺寸以及对陶瓷样品致密化行为、显微结构和光学性能的影响。结果表明:通过球磨过程可以充分细化原料粉体的颗粒;随着球磨转速的提高,陶瓷烧结时样品中的气孔能更好地排除。但是球磨转速过高时,陶瓷烧结体中存在少量的富铝第二相会降低样品的光学透过率。当球磨转速为130 r/min时,真空烧结(1760℃×50 h)所得Nd:YAG透明陶瓷的微结构均匀致密,几乎没有晶界和晶内气孔存在,样品在1064 nm处的直线透过率高达83%。Transparent 1.0at%Nd：YAG ceramics were fabricated by the solid-state reaction and vacuum sintering method using Y203, α-A12O3 and Nd2O3 as starting powders. These powders were mixed in ethanol with MgO and TEOS as sintering aids and ball milled at different speeds for 10 h. Effects of ball milling speed on the particle size of powder mixtures as well as the densification process, the microstructure and the optical transparency of Nd：YAG ce- ramics were mainly investigated. It is showed that coarse powders can be ground into fine particles with increase of the ball milling speed up to 130 r/min. Porosities of the sintered Nd：YAG ceramics decrease with the increase of ball milling speed. Al-rich secondary phase can be observed in the microstructure of Nd：YAG ceramics when the ball mill- ing speed is over-high, and it will cause a decrease in the optical transmittance. For the sample sintered at 1760℃for 50 h from the powder mixture ball milled at 130 r/min, the in-line transmittance reaches 83% at 1064 nm and there are almost no pores at the grain boundaries and inner grains.

关 键 词：Nd:YAG激光陶瓷 球磨转速 显微结构 光学性能 

分 类 号：TQ129[化学工程—无机化工]