摘要
以Al(NO3)S9H2O,Y(NO3)26H2O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%.
The single phase of Nd: YAG powder were synthesized at 1 000℃ by the evaporation of its nitrate solution method using Al(NO3 ) 39 H2O, 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 1 500℃~1 700℃ for 5 h. 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 1 000℃ 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 200~250 nm. 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.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2007年第5期835-838,共4页
Journal of Xidian University
基金
陕西省攻关项目(2005k06-G11)