高能球磨Al-Y_2O_3粉体固相反应制备YAG陶瓷的研究  

Investigation of High-energy Ball Milling of AI-Y_2O_3 Mixtures and Solid-state Reaction Synthesis of YAG Ceramics

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

机构地区：[1]哈尔滨工业大学复合材料与结构研究所,哈尔滨150001

出　　处：《无机材料学报》2008年第6期1131-1134,共4页Journal of Inorganic Materials

基　　金：国家"十五"预研计划(41312040401);国家863计划新材料领域(2002AA305507)

摘　　要：用高纯Al粉体和Y_2O_3粉体(Al-Y_2O_3粉体)为原料采用固相反应法制备了YAG陶瓷.Al-Y_2O_3粉体高能经过球磨,煅烧生成YAG粉体,再真空烧结制备高致密YAG陶瓷.采用DTA-TG对球磨Al-Y_2O_3粉体进行分析,采用XRD、SEM对球磨的Al-Y_2O_3粉体、YAG粉体及YAG陶瓷进行了表征.实验表明:Al-Y_2O_3粉体在～569℃时,Al粉强烈氧化,并与Y_2O_3粉反应,600℃煅烧出现YAM相,随煅烧温度升高出现YAP相,1200℃煅烧生成YAG粉体.成型YAG素坯在1750℃保温2h真空烧结出YAG相陶瓷,YAG陶瓷相对密度可达98.6%,晶粒生长均匀,晶粒尺寸为8～10μm.YAG ceramics were fabricated by solid-state reaction method using high pure powders（Al, Y2O3）as starting materials.YAG ceramics were fabricated by vacuum sintering YAG compacts which were calcined from high energy milled A1-Y203 powders.Al-Y2O3 powders as-milled were analyzed by DTA-TG,Al-Y2O3 powders,YAG powder and YAG ceramics were characterized by XRD and SEM.The results show that Al powders in Al-Y2O3 powders oxide intensively at 569℃,and continue to react with Y2O3,YAM phase appears after calcined at 600℃,YAP phase emerges with calcination temperature increasing,YAG phase is formed at 1200℃.YAG ceramics are fabricated from YAG compact by vacuum sintering at 1750℃for 2h,the relative density of YAG ceramics is about 98.6%,the YAG grains grow uniformly with average size of 8-10μm tested by SEM.

关 键 词：高能球磨 AL Y2O3 DTA-TG YAG 

分 类 号：TB332[一般工业技术—材料科学与工程]