( 1. 東北大學(xué) 材料與冶金學(xué)院, 沈陽 110004；
2. 沈陽大學(xué)機(jī)械學(xué)院， 沈陽 110041)
摘 要: 研究了結(jié)晶析出法制備YAG超細(xì)粉的工藝， 采用鋁和釔的硝酸鹽或硫酸鹽混合溶液為原料，蒸發(fā)去水獲得硝酸鹽或硫酸鹽的混晶體。 結(jié)果表明： 硝酸鹽混晶體經(jīng)1100℃煅燒可獲得YAG粉體， 加入Y2O3籽晶可使YAG相形成溫度下降約100℃； 硫酸鹽混晶體經(jīng)1300℃煅燒2h后也可獲得YAG粉體； 硝酸鹽混晶體煅燒得到的YAG粉體團(tuán)聚嚴(yán)重， 燒結(jié)體最大相對密度僅為74.3%； 硫酸鹽混晶體煅燒得到的YAG粉體團(tuán)聚較少， 粉體平均粒徑約為300nm， 燒結(jié)體密度為95.2%。
關(guān)鍵字: 結(jié)晶析出法；YAG；超細(xì)粉； Y2O3籽晶
（ 1. School of Materials and Metallurgy,
Northeastern University, Shenyang 110004, China;
2. College of Mechanical Engineering,
Shenyang University, Shenyang 110041, China）
Abstract: Synthesize of ultrafine YAG powder using crystallization method was investigated. The results show that YAG powder can be obtained by calcining the mixed solution of aluminum and yttrium nitrates at 1100℃. Y2O3 crystal seed can decrease the forming temperature of YAG phase by 100℃. YAG powder is also fabricated by calcining the aluminum and yttrium sulfates at 1300℃. YAG powders obtained by nitrates crystallization method are severely agglomerated, the maximum relative density of the sintered body is only 74.3%. YAG powder obtained by sulfates crystallization method is less agglomerated, the primary diameter of the powder is 300nm, and the relative density of the powder is 95.2%.
Key words: crystallization method; YAG; ultrafine powders; Y2O3crystal seeds
