Y_2O_3-Al_2O_3粉体固相反应制备Y-Al-O体系陶瓷的对比研究  

COMPARATIVE STUDY ON THE SOLID-STATE REACTION SYNTHESIS OF Y-Al-O SYSTEM CERAMICS BY Y_2O_3-Al_2O_3 POWDERS

作　　者：李长青[1] 张俊才[1] 张明福[2] 左洪波[2] 

机构地区：[1]黑龙江科技学院,哈尔滨150027 [2]哈尔滨工业大学,哈尔滨150001

出　　处：《硅酸盐学报》2010年第12期2308-2313,共6页Journal of The Chinese Ceramic Society

基　　金：黑龙江省教育厅科学技术研究(11513099);黑龙江科技学院青年教师基金(2006-12)资助项目

摘　　要：研究了摩尔比n(Y2O3):n(Al2O3)分别为2:1、1:1和3:5的粉体在不同温度发生的相变及其高温烧结的陶瓷。Y2O3-Al2O3粉体经球磨后在1750℃真空烧结制备陶瓷。用差热-热重、X射线衍射及扫描电子显微镜表征制备的Y2O3-Al2O3材料。结果表明:在低于800℃时,Y2O3-Al2O3之间未发生反应;在1000℃煅烧后,出现Y4Al2O9(YAM)相;1200℃煅烧后,出现YAlO3(YAP)相和钇铝石榴石(yttrium aluminumgarnet,YAG)相。n(Y2O3):n(Al2O3)=3:5粉体在1400℃煅烧后生成YAG纯相。n(Y2O3):n(Al2O3)=2:1、3:5粉体烧结的陶瓷的物相分别为YAM相和YAG相,其相对体积密度分别为97.8%和99.95%,n(Y2O3):n(Al2O3)=1:1粉体烧结陶瓷的物相为多相共存,3种配比制备陶瓷断口的形貌差别较大。Phase transformations of powders with varying mole ratios n（Y2O3）：n（Al2O3） = 2：1,1：1,3：5 calcined under different temperatures and their ceramics sintered under high temperature were investigated.The Y2O3-Al2O3 system was characterized by the differential thermal analyzer-thermogravimetry,X-ray diffraction and scanning electron microscopy.The results show that no reaction occurs in the Y2O3-Al2O3 system below 800 ℃,and Y4Al2O9（YAM） phase appears after calcination at 1 000 ℃,YAlO 3（YAP） and yttrium aluminum garnet（YAG） phases are shown after calcination at 1 200 ℃.The Y2O3-Al2O3 system with n（Y2O3）：n（Al2O3） = 3：5 is transformed into YAG single phase after calcination at 1 400 ℃.Ceramics prepared in the Y2O3-Al2O3 system with n（Y2O3）：n（Al2O3） = 2：1 and 3：5 are YAM and YAG phases and their relative volume density values are 97.8% and 99.95%,respectively.Multiphases coexist in ceramics prepared in the Y2O3-Al2O3 system with n（Y2O3）：n（Al2O3） = 1：1.The fracture morphologies of the three ratios of ceramics vary widely.

关 键 词：氧化钇-氧化铝 球磨 煅烧 钇铝石榴石 

分 类 号：TB332[一般工业技术—材料科学与工程]