固相反应法制备透明多晶YAG陶瓷  

FABRICATION OF TRANSPARENT YAG CERAMICS BY SOLID-STATE METHOD

作　　者：李长青[1] 左洪波[1] 张明福[1] 孟松鹤[1] 韩杰才[1] 丁志立[1] 

机构地区：[1]哈尔滨工业大学复合材料研究所,哈尔滨150001

出　　处：《硅酸盐学报》2006年第8期979-984,共6页Journal of The Chinese Ceramic Society

基　　金：国家"211"工程科技攻关资助项目

摘　　要：采用高纯α-Al2O3和Y2O3作为原料并由固相反应法合成了钇铝石榴石(yttriumaluminumgarnet,YAG)透明多晶陶瓷。α-Al2O3和Y2O3的摩尔比为5:3,并添加0.5%(质量分数)正硅酸乙脂为烧结助剂的混合粉体经球磨后,在1400℃空气中煅烧,经成形并在1750℃真空烧结4h制备得到透明YAG陶瓷。1850℃真空烧结4h的YAG陶瓷晶粒粗大,晶界宽化,晶界处有共晶相YAlO3相和α-Al2O3相存在。Transparent yttrium aluminum garnet （YAG） ceramics were synthesized by a solid-state reaction method using commercial high-purity ultra-fine powders of a-Al2O3 and Y2O3 as starting materials. Mixed powders with a molar ratio of a-Al2O3 to Y2O3, adding 0.5%（in mass） tetralethal ortho silicate as a sintering aid were milled and calcined at 1 400 ℃, then formed and sintered in vacuum at 1 750 ℃ for 4 h to obtain the transparent YAG ceramics. Large crystal grain and wide grain boundaries were obtained in YAG ceramics sintered at 1 850 ℃ for 4 h, and a eutectic region of yttrium aluminum phase and a-Al2O3 existed in the grain boundary.

关 键 词：钇铝石榴石 晶界 共品 透明陶瓷 

分 类 号：TB332[一般工业技术—材料科学与工程]