金红石型钛白粉

表面包覆氧化铝的形态及机理

金红石型钛白粉

、

锐钛型钛白粉

、

立德粉

、

硫酸钡

、

碳酸镁

　　摘要: 探讨了以H2SO4 和CH2OHCH2C1 为酸解介质时, 氯化法金红石型钛白粉表面包铝的行

为及形态特征。利用正交实验研究了包膜过程中, 熟化pH、熟化时间以及温度对包铝钛白粉白度的

影响。氯化法金红石型钛白粉浆液在pH 为10 时, Ze ta 电位最大, 在水中达到最佳分散。利用

H2OHCH2C1 作为酸解介质时, 浆液中的均相成核得到显著抑制, 钛白粉表面的包膜质量得到明显

改善。以稀硫酸作为酸解介质时, 随熟化温度升高和熟化时间的延长, 钛白粉包覆效果明显改善, 白

度值明显升高。

关键词: 金红石; 钛白粉; 包膜; 氧化铝

M or phology an dM echan ism of Ru t ile T itan ium D iox ide

Powder Coa ted by Alum in ium Ox ide

KAN G Ch un 2lei1 , 　L I Ch un 2zhong 1 3 , 　WAN G Zh i2t ing 2,

YU M in g 3, 　WAN G Q i2f a ng 1 , 　FAN G Tu 2nan 1

(1. Key L a bora tory f or U lt raf ineM a ter ia ls of theM in istry

of Ed u ca tion ECUS T , S ha ng h a i 200237, Ch in a;

2. S h ij iazh uan g B aosh i E lect r ic Glass Co. L td , S h ij iazh uan g 050053, Ch ina;

3. S h ang h a i C h lor 2alka li Ch em ica l Co. L td , S han g ha i 200241, Ch ina )

Abstra ct: T he mo rphology and mechanism of ru tile t itanium dioxide coat ed by alum inum ox ide were

inves t iga ted and the effect s of pH and react ion temperatu re were s tudied expe rim enta lly. T he result s ind i2

cate tha t the dispe rsions of titanium dioxide pow der po sse sses a h ighes t Zeta po tent ia lwhen pH c lo sed to

10, and at this condit ion t itanium d ioxide powder is able to be dispersed bes t in wate r. U nifo rm th in f ilm is

fo rm ed on titan ium dioxide pa rt icle s a t h igh react ion t ime and tempe ra ture, and a lso when CH2OHCH2Cl is

u sed ins tead of H2SO 4. The white value increa ses w ith the increa se of the react ion t emperature and tim e.

Key words: ru tile; titan ium dioxide; coat ings; a lum ina

　　钛白粉是一....