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硝酸盐热分解法制备Nd:YAG透明激光陶瓷

李桂芳;曹全喜;李双春;苏莎莎
  

  1. (西安电子科技大学 技术物理学院,陕西 西安 710071)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-10-20 发布日期:2007-10-25

Preparation of transparent laser ceramics Nd:YAG by the nitrate pyrogenation method

LI Gui-fang;CAO Quan-xi;LI Shuang-chun;SU Sha-sha
  

  1. (School of Technical Physics, Xidian Univ., Xi′an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-10-20 Published:2007-10-25

摘要: 以Al(NO3)39H2O,Y(NO3)6H2O和Nd2O3为原料,采用硝酸盐热分解法在1000℃左右合成了单相Nd:YAG陶瓷超细粉体.加入0.5%的正硅酸乙酯作为烧结添加剂后,前驱粉料经1500℃~1700℃真空热压烧结5h得到具有一定透明度的掺钕钇铝石榴石多晶陶瓷.采用X射线衍射仪(XRD)及扫描电子显微镜(SEM)等测试手段对Nd:YAG陶瓷材料进行了测试,结果表明当焙烧温度为1000℃时,前驱粉体可以直接得到YAG立方晶相,没有YAM和YAP等中间相生成,煅烧所得的粉末颗粒细小均匀,呈椭球状,颗粒尺寸为200~250nm,且分散性较好.真空烧结后的陶瓷晶粒尺寸在2~4μm,并且随着烧结温度的提高,Nd:YAG陶瓷的晶粒增大,晶形发育完整,气孔减少,晶粒内部和晶界的化学组成基本相同.所制备的Nd:YAG透明陶瓷在可见光区最大透光率为47%,在红外光区的透光率接近56%.

关键词: 硝酸盐热分解法, Nd:YAG, 透明陶瓷

Abstract: The single phase of Nd:YAG powder were synthesized at 1000℃ by the evaporation of its nitrate solution method using Al(NO3)39H2O, Y(NO3)36H2O and Nd2O3 as starting materials. With the addition of 0.5%(in mass) tetraethyl orthosilicate as the sintering aid, transparent Nd:YAG ceramics were fabricated by vacuum sintering at 1500℃~1700℃ for 5h. The Nd:YAG transparent ceramics materials were characterized by the XRD and SEM. The results show that the precursor completely transformed to the YAG(Y3Al5O12) phase at about 1000℃ without the intermediate phase of YAM and YAP. The dispersive and flowing property of the particle are very good and the grain size of Nd:YAG is in the range of 200~250nm. The SEM of the fracture surface of the sintered body shows that the grain size is about 2~4μm and that the grain increases while the pores decrease with the increase of the sintered temperatures. The chemical composition of Nd:YAG transparent ceramics in the inner grain and at the grain boundary are basically uniform. Its optical transmittance reaches 47% in the visible light wavelengths, and 56% in the infrared wavelengths.

Key words: nitrate pyrogenation method, Nd:YAG, transparent ceramics

中图分类号: 

  • TQ174