纳米金红石型二氧化钛粉末的研制

来源期刊：中南大学学报(自然科学版)2002年第4期

论文作者：高桂兰 段学臣

文章页码：397 - 400

关键词：纳米;金红石型;二氧化钛;均匀沉淀法

Key words：nanometer; rutile; TiO₂ powder; homogeneous precipitation

摘    要：以硫酸法制备钛白粉工艺的中间产物———钛液为原料,采用均匀沉淀法,外加自制晶种为金红石化促进剂,以十二烷基磺酸钠为表面活性剂,尿素为沉淀剂,制备纳米金红石型二氧化钛粒子;研究了反应物浓度、反应物配比、反应温度、反应时间等对粒子粒径及产物收率的影响;利用TEM,XRD,BET,ICP-AES等分析测试技术,对粉体粒子的形貌、粒径、晶型、比表面积和纯度进行表征.研究结果表明:所得二氧化钛粒子为金红石型,形貌呈球形,平均粒径达80 nm,产品纯度达99.95%;该制备技术工艺新,生产成本低,工艺操作简单,易于实现工业化,便于用硫酸法生产钛白的厂家在原有工艺基础上对中间产品进行深加工.

Abstract: The nanometer rutileTiO₂ powder is prepared by the applied seed-homogeneous precipitation method, using industrial Ti(SO₄)₂ solution as raw material, urea as precipitant, and DBS as surfactant. The effects of the operation parameters on the nanometer particle size and rate of recovery, including the reactant concentration, reactant temperature and reactant time are discussed in detail. The morphology, phase, size and purity of TiO₂ powder are studied by means of TEM, XRD, BET and ICP-AES. The experimental results show that the TiO₂ particles prepared are rutile, spherical,and nanometer. The average particle diameter is 80 nm. The new technology is easy to adopt and low in cost. The nanometer titanium dioxide powder can meet the market needs.