低温烧成YAG用前驱体碳酸钇铝铵的合成  

Synthesis of Yttrium Aluminum Ammonium Carbonate Precursor for Low Temperature Calcined YAG Nano Powders

作　　者：裴浩宇[1] 朱伟[1] 周雪珍[1] 张尚虎 方中心 李永绣[1] 

机构地区：[1]南昌大学稀土与微纳功能材料研究中心,江西南昌330031 [2]甘肃稀土新材料股份有限公司,甘肃白银730922

出　　处：《中国稀土学报》2015年第6期689-696,共8页Journal of the Chinese Society of Rare Earths

基　　金：工信部稀土专项;国家自然科学基金项目(21161014)资助

摘　　要：以Al(NO_3)_3,Y(NO_3)_3为原料,NH_4HCO_3为沉淀剂,利用共沉淀法制备了能够在较低煅烧温度下形成纯YAG相的前驱体碳酸钇铝铵粉体。采用红外光谱、X射线衍射、扫描电镜等技术对不同沉淀条件下所得沉淀的组成和过滤性能以及烧成YAG粉体的相纯度和颗粒特征进行了表征。研究了温度、加料方式、陈化和搅拌时间等条件对过滤效率和颗粒表面电位的影响。结果表明:采用简单的将钇铝混合硝酸盐溶液加入到NH_4HCO_3溶液中的反向沉淀法,可以获得易于过滤的碳酸钇铝铵无定型沉淀。这种无定型碳酸钇铝铵前驱体在高温煅烧下形成纯YAG相所需的温度比陈化后的结晶碳酸钇铝前驱体要低200℃。在1100℃下煅烧2 h所得产物为直径在60 nm左右的类球形均匀颗粒。Yttrium aluminum ammonium carbonatepowders at low calcining temperature were preparedprecursors （YAACP） which could transfer to pure YAG nanoby co-precipitation method using yttrium nitrate and aluminumnitrate as raw materials and ammonium bicarbonate as precipitant. The composition and filtration performance ofYAACP that prepared under different conditions and the phase purity as well as particle size of YAG powers cal-cined at different temperatures were characterized by IR, XRD and SEM with respecting to the effect of synthesisconditions such asfeedingmethod, temperature, aging and stirring time etc on the filtrating performance and parti-cle surface zeta potential. The results showed that amorphous YAACP easy to filter could be prepared by reverseprecipitation method, i. e. , adding metal nitrate solution to ammonium bicarbonate solution. The temperature toobtain pure YAG phase by calcining amorphous YAACP was 200 ℃ lower than that by calcining crystallineYAACP. And obtained products calcined at 1200 ℃ were well dispersed and uniformly distributed spherical parti-cles with size around at 60 nm in diameter. Therefore, a simple and effective method to get precursor easy to filterand form pure YAG material at relatively lower temperature was provided

关 键 词：共沉淀法 YAG ZETA电位 过滤性能 碳酸钇铝铵 稀土 

分 类 号：O482.2[理学—固体物理]