沉淀法制备纳米钛酸锌粉体的研究

文中以TiCl₄和ZnCl₂的混合液为原料液、以NaOH为沉淀剂，采用直接沉淀法，在不同沉淀剂的质量浓度(3，6，9mol/L)以及Zn²⁺与Ti⁴⁺的摩尔比为1∶1.2～2∶1的条件下，通过煅烧，得到粒径小于100nm的立方相钛酸锌粉体。研究结果表明：沉淀剂NaOH浓度为3mol/L，Zn2+与Ti⁴⁺的摩尔比为1∶1时，经600℃煅烧得到粒径约为40nm的纯立方相ZnTiO₃粉体；Zn²⁺与Ti⁴⁺的摩尔比为2∶1时，经800℃煅烧得到粒径约90nm的Zn₂TiO₄粉体。粉体形貌为球形，粒度分布窄。

Preparation of nano-sized zinc titanante powders by direct-reactive precipitation

In a direct-reactive precipitation process for preparation of nano-sized zinc titanante powders, a mixture of ZnCl₂ and TiCl₄ solutions was used as a reactant and a solution of NaOH as a precipitant. Different concentrations of the precipitan (3, 6, 9mol/L) and different molar ratios of Zn²⁺ to Ti⁴⁺ (1:1.2～2:1) were used to prepare the cubic nano-sized zinc titanante powders. The results demonstrated that when the concentration of the precipitant is 3mol/L and the molar ratio is 1:1, the cubic nano-sized ZnTiO₃ with a mean grain size of about 40nm, can be obtained under 600℃ by calcinations; when the concentration of the precipitant is 3mol/L and the molar ratio is 2:1, the Zn₂TiO₄ powder with a mean grain size of about 90nm, can be obtained under 800℃ by calcinations. And the powders have sphere shape with a narrow PSD.