碳酸铵盐前驱体热分解制缩取高活性YAG纳米粉体  

Highly Sinterable YAG Powder Derived from Thermal Decomposition of Carbonate Precursor

作　　者：丁志立[1] 陈嵩[1] 韩杰才[1] 

机构地区：[1]哈尔滨工业大学复合材料研究所,哈尔滨150001

出　　处：《压电与声光》2004年第5期396-398,共3页Piezoelectrics & Acoustooptics

摘　　要：以碳酸氢铵为沉淀剂 ,硝酸盐为原料 ,采用沉淀法 ,通过仔细控制沉淀过程的工艺参数 ,得到了煅烧后可直接生成纯相 Y3Al5O1 2 (YAG)的前驱体沉淀物。采用 XRD、DTA、ICP、TEM、BET等手段表征了前驱体和产物的特征。研究结果表明 ,沉淀剂浓度、沉淀剂与金属离子的摩尔比和滴加速度等因素对产物性质产生显著的影响。粉体晶粒大小均一 (5 7～ 6 3nm)、晶粒形状为椭球形 ,基本无团聚存在。 YAG纳米粉体具有良好的烧结活性 ,粉体经过 170 0°C真空烧结 6 h。Carbonate precursors of Y_3Al_5O_(12) (YAG) were synthesized from a mixed solution of aluminum and yttrium nitrate using ammonium hydrogen carbonate as precipitant. The precursor and powder were characterized by XRD、DTA、ICP、TEM、 BET. It was determined that the precipitant concentration, the molar ratio of precipitant / total-cations and dripping speed of the salt solution are critical factors in forming stoichiometric YAG precursor. The YAG particles tended to be highly regular in morphology with extremely small dimensions (57～63 nm) and were less agglomeration. It was also demonstrated that the powders were highly sinterable and could be densified to transparency under vaccum at 1 700 °C for 6 h without additives.

关 键 词：YAG 纳米粉 沉淀法 透明陶瓷 

分 类 号：TB383[一般工业技术—材料科学与工程]