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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
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)
