Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (6): 581-587.doi: 10.15541/jim20140621

• Orginal Article • Previous Articles     Next Articles

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

Jing LIU1,2(), Jun LIU1, Jiang LI2(), Li LIN1,2, Yu-Bai PAN2, Xiao-Nong CHENG1, Jing-Kun GUO2   

  1. 1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 210031, China
    2. Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2014-12-01 Revised:2015-02-13 Online:2015-06-04 Published:2015-05-22
  • About author:LIU Jing. E-mail: liujing53302@163.com
  • Supported by:
    National Natural Science Foundation of China (50990301, 51302298);Colleges and Universities Plans to Graduate Resesrch and Innovation of 2013(CXLX13-650)

Abstract:

Transparent 1.0at%Nd:YAG ceramics were fabricated by the solid-state reaction and vacuum sintering method using Y2O3, α-Al2O3 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 ceramics 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 milling 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.

Key words: Nd:YAG laser ceramics, ball milling speed, microstructure, optical transmittance

CLC Number: 

  • TQ129