溶胶凝胶燃烧法合成YAG纳米粉  

Synthesis of Nano YAG Powder by Sol-Gel Combustion Process

作　　者：李全明[1,2] 邱发贵[1] 张梅[1] 李江 张万喜[2] 

机构地区：[1]吉林大学军需科技学院,吉林长春130062 [2]吉林大学材料科学与工程学院,吉林长春130012 [3]上海硅酸盐研究所,上海200050

出　　处：《稀有金属材料与工程》2008年第A01期292-295,共4页Rare Metal Materials and Engineering

摘　　要：以硝酸钇、硝酸铝为原料,采用溶胶—凝胶/燃烧合成结合法合成了钇铝石榴石(Y_3Al_5O_(12),YAG)超细微粉。用X射线衍射仪(D/Max-2550V型)及傅立叶红外光谱(FT-IR)确定前驱体和不同温度处理的粉末的相组成;借助于德国NETZSCH STA 449C TG-MS热分析仪(升温速率为10℃/min)对前驱体粉末的热分解过程进行了研究,由JEM-200CX型透射电镜观察粉体的形貌。结果表明过多的柠檬酸和羧酸盐在400℃分解形成碳酸盐,在800℃YAG相开始逐渐形成,在900℃形成了结晶完全的YAG相,而没有中间相产生。经1000℃热处理获得了超细、分散良好、粒度为80 nm左右的均匀粉体。Yttrium aluminum garnet （Y3Al5O12, YAG） powders were synthesized by a sol-gel combustion process from a mixed solution containing aluminum and yttrium nitrates. Thermal behavior of the precursor was determined by DSC-TG-MS techniques. FTIR and XRD techniques were used to characterize the processed precursor. Particle sizes of the powders were characterized by JEM-200CX TEM. It was found that excess citric acid and carboxylate mixture decomposed at about 400 ℃ to form carbonates. YAG phase was supposed to nucleate directly from the amorphous precursor at about 800 ℃. Mono-phase YAG crystallites could be formed without the formation of any intermediate phase at 900 ℃. The powders calcined at 1000 ℃ were uniform and in good dispersity with an average particle size of about 80 nm.

关 键 词：溶胶-凝胶/燃烧法 纳米粉体 YAG 低温合成 

分 类 号：TB383.1[一般工业技术—材料科学与工程]