纳米ITO粉末的离心喷雾造粒工艺  

Centrifugal spray granulation technology of nanometer ITO powders

作　　者：彭平[1] 陈敬超[1] 杜焰[1] 陈守东[1] 王鹏[1] 武月春 于杰[1] 

机构地区：[1]昆明理工大学稀贵及有色金属先进材料教育部重点实验室,云南省新材料制备与加工重点实验室,昆明650093

出　　处：《粉末冶金材料科学与工程》2014年第3期395-400,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：新国家自然科学联合基金(u0837601);新国家基金号(50874054);云南省创新团队(2009CI003);云南省自然科学基金(2008CD087)

摘　　要：以纳米氧化铟锡(ITO)粉末为原料,采用离心喷雾造粒技术制备高性能ITO造粒粉体,通过SEM、激光粒度仪及松装密度仪等手段研究浆料固相含量、粘结剂含量及雾化器转速对干燥粉体形貌、粒径分布、流动性和松装密度的影响。结果表明:当浆料固相含量为50%、粘结剂为1%、雾化器转速为10 800 r/min时,喷雾造粒得到的ITO粉体成球率较高、粒径分布均匀、松装密度和流动性显著提高。用该ITO造粒粉末经冷等静压成形制坯和常压烧结制备靶材,压坯和烧结坯的致密度可达到61.7%和99.27%。The indium-tin oxide （ITO） granulation powders were prepared by centrifugal spray drying process with nanometer ITO powders. The effects of solid loading and binder content and rotation rate of spray head on the morphology, diameter distribution, flow rate, packing density of the spray dried granules were examined by SEM, laser particle size analyzer and bulk density meter. The results show that the optimal operation parameters are obtained for preparing high spherical particles and uniform size distribution：solids content of slurry is 50%, the binder concentration is 1%and the rotation frequency of spray head is 10 800 r/min, the flow rate and packing densities have risen notably. The relative density of the ITO green body and ITO target run up to 61.7%and 99.27%after cold isostaic compaction and normal pressure sintering method.

关 键 词：离心喷雾干燥 ITO粉造粒 成球率 松装密度 相对密度 

分 类 号：TB34[一般工业技术—材料科学与工程] TB332