Effects of Hydrolysis Parameters on TiO₂ White Pigment from Low Concentration Industrial TiOSO₄ Solution via Sulfate Process

Abstract:

Short sulfate process was developed to produce TiO₂ white by using unconcentrated industrial TiOSO₄ solution as raw material. Herein, anatase titania white pigment was prepared by self-generated seeded thermal hydrolysis route. The effects of hydrolysis parameters (such as pre-adding water volume ratio, F value and aging time) on the structure and pigment properties of the as-prepared samples were investigated. The samples were characterized by XRD, particle size distribution, SEM and pigment properties test. These factors influenced the number and quality of the hydrolysis nuclei, hydrolysis velocity, crystal growth rate and the particles aggregation, eventually determined its structure and pigment properties. The optimized pre-adding water volume ratio was of 0.18:1, the F value was of 1.95 and the aging time after turning-grey-color point was of 20~30 min, and the prepared TiO₂ was with anatase phase, narrow particle size distribution and excellent pigment properties.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 1243-1249
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.1243
• Online since: December 2012
• Authors: Cong Xue Tian
• Keywords: Aging Time, F Value, Hydrolysis, Low Concentration Titanyl Sulfate, Pre-Adding Water

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