Influence of Different Conditions on the Precipitation of Metatitanic Acid to Synthesis Rutile TiO2 via Sulfuric Acid Process

The formation of metatitanic acid particles in the form of rutile TiO2 is an important step in the sulfuric acid process used to manufacture white pigment. F value, temperature and stirring speed were investigated to study their influence on the particle size and distribution in this paper. The results showed that suitable size and narrow particle size distribution were obtained in metatitanic acid on the condition that F value was 2.02, the temperature was 95°C and the stirring speed was 300r/min. Metatitanic acid was calcined above 850°C to form rutile TiO2. The crystal structure and micromorphology of TiO2 were characterized by XRD and SEM, respectively. The results demonstrated that a rutile TiO2 with high crystallinity was prepared.

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Effects of Concentration of TiOSO4 and Fe/TiO2 Ratio on TiO2 Anatase White Pigment Production via Short Sulfate Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.634-638.391 ◽

2013 ◽

Vol 634-638 ◽

pp. 391-396 ◽

Cited By ~ 1

Author(s):

Cong Xue Tian ◽

Shuang Hua Huang ◽

Ying Yang

Keyword(s):

Crystal Structure ◽

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Narrow Particle Size Distribution ◽

Crystal Formation ◽

Aggregation Process ◽

Thermal Hydrolysis ◽

White Pigment ◽

Sulfate Process

Using unconcentrated TiOSO4 solution from sulfate process as titanium source, anatase TiO2 white pigment was prepared by self-generating seed thermal hydrolysis route via short sulfate process. The effects of concentration of TiOSO4 solution and Fe/TiO2 ratio on the structure and pigment properties of the TiO2 white pigments were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The concentration of TiOSO4 solution and Fe/TiO2 ratio had great effects on the super-saturation of TiO2+, crystal formation, nucleation, crystallization and aggregation process, eventually determined the crystal structure, particle size distribution and its pigment properties. The optimized concentration of TiOSO4 solution was of 195 g/L, and the Fe/TiO2 ratio was at 0.30.The as-prepared anatase white pigment was appropriate particle size, narrow particle size distribution and good pigment properties.

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Preparation of Potassium Niobate/Barium Titanate Nanocomposite Ceramics with a Wide Barium Titanate Particle Size Distribution and their Dielectric Properties

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.582.76 ◽

2013 ◽

Vol 582 ◽

pp. 76-79

Author(s):

Ichiro Fujii ◽

Kenta Yamashita ◽

Kouichi Nakashima ◽

Yoshinori Fujikawa ◽

Daisuke Tanaka ◽

...

Keyword(s):

Crystal Structure ◽

Particle Size ◽

Barium Titanate ◽

Particle Size Distribution ◽

Size Distribution ◽

Molar Ratio ◽

Narrow Particle Size Distribution ◽

Potassium Niobate ◽

Barium Titanate Powder ◽

Wide Particle Size Distribution

Denser, solvothermally synthesized KNbO3 (KN) / BaTiO3 (BT) composites with heteroepitaxial interfaces were prepared using the barium titanate powder with a wide particle size distribution. The relative density was 68 - 80 %, which was larger than that of the composites prepared using the barium titanate powder with a narrow particle size distribution. The dielectric constant was 300 450 and it was maximized at the KN/BT molar ratio of 0.5. The origin was discussed with the microstructure and crystal structure.

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Effect of Vibro-Milling Time on Phase Formation and Particle Size of ZnNbO6 Nano-Powders

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.421-422.550 ◽

2009 ◽

Vol 421-422 ◽

pp. 550-553

Author(s):

Athipong Ngamjarurojana ◽

Rattikorn Yimnirun ◽

Supon Ananta

Keyword(s):

Crystal Structure ◽

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Phase Formation ◽

Milling Time ◽

Distribution Curve ◽

Laser Diffraction ◽

Narrow Particle Size Distribution ◽

Particle Size Distribution Curve

Zinc niobate, ZnNb2O6, nanopowders was synthesized by a solid-state reaction via a rapid vibro-milling technique. The effect of milling time on the phase formation and particle size of ZnNb2O6 powder was investigated. The formation of the ZnNb2O6 phase investigated as a function of calcination conditions by DTA and XRD. The particle size distribution of the calcined powders was determined by laser diffraction technique, while morphology, crystal structure and phase composition were determined via a SEM techniques. In addition, by employing an appropriate choice of milling time, a narrow particle size distribution curve was also observed.

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Influences of Hydrolysis Temperature and Hydrolysis Time on Titanium White Pigment via Short Sulfate Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.602-604.1255 ◽

2012 ◽

Vol 602-604 ◽

pp. 1255-1260 ◽

Cited By ~ 2

Author(s):

Cong Xue Tian ◽

Shuang Hua Huang ◽

Ying Yang

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Boiling Point ◽

Hydrolysis Rate ◽

Narrow Particle Size Distribution ◽

Hydrolysis Time ◽

White Pigment ◽

Hydrolysis Temperature ◽

Sulfate Process

Using low concentration TiOSO4 as titanium raw material, anatase white pigment was prepared by self seeded thermal hydrolysis route via short sulfate process. The effects of hydrolysis temperature and hydrolysis time on the structure and pigment properties of the as-prepared samples were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The hydrolysis temperature and time had great effects on the hydrolysis rate, particle size distribution, crystal growth and particle aggregation of TiO2, eventually determined the pigment structure and its pigment properties. The optimized hydrolysis temperature was at faint boiling point, and the hydrolysis time after second boiling point was of 2.5h. Anatase white pigment was appropriate particle size, narrow particle size distribution and good pigment properties.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.602-604.1243 ◽

2012 ◽

Vol 602-604 ◽

pp. 1243-1249 ◽

Cited By ~ 1

Author(s):

Cong Xue Tian

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Aging Time ◽

Volume Ratio ◽

Narrow Particle Size Distribution ◽

Water Volume ◽

White Pigment ◽

Anatase Titania ◽

Sulfate Process

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.

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Hydrolysis Time on Rutile TiO2 White Pigment via Short Sulfate Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.968.36 ◽

2014 ◽

Vol 968 ◽

pp. 36-39

Author(s):

Cong Xue Tian

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Hydrolysis Rate ◽

Narrow Particle Size Distribution ◽

Thermal Hydrolysis ◽

Structure And Properties ◽

Hydrolysis Time ◽

White Pigment ◽

Sulfate Process

Rutile TiO2 white pigment was prepared by self-seeded thermal hydrolysis route via short sulfate process from low concentration TiOSO4 solution. Hydrolysis time had significantly influenced the structure and pigment properties of rutile TiO2. The samples were characterized by XRD, particle size distribution and pigment properties test. The hydrolysis time had great influences on the hydrolysis rate, particle size distribution, crystal growth and particle aggregation of TiO2, eventually determined the pigment structure and properties. The optimized hydrolysis time after second boiling point was of 2.5h. And the prepared rutile TiO2 white pigment was with narrow particle size distribution and nice pigment properties.

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Effects of Pre-Adding Water Volume Ratio on Rutile White Pigment Production via Sulfate Short Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1030-1032.65 ◽

2014 ◽

Vol 1030-1032 ◽

pp. 65-68

Author(s):

Hua Chen ◽

Shuang Hua Huang ◽

Hong Pu ◽

Cong Xue Tian ◽

An Bing Liang

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Volume Ratio ◽

Raw Material ◽

Narrow Particle Size Distribution ◽

Water Volume ◽

White Pigment ◽

Hydrolysis Process ◽

Sulfate Process

Using unconcentrated industrial TiOSO4 solution as raw material, rutile TiO2 white pigment was prepared via the self-seeded thermal hydrolysis sulfate process. The effects of pre-adding water volume ratio on the hydrolysis process and pigment properties of the TiO2 white pigments were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The pre-adding water volume ratio had great effects on the quantity and active of seed crystal, hydrolysis process, eventually determined particle size distribution and its pigment properties. The optimized pre-adding water volume ratio was of 0.22. The as-prepared rutile white pigment was with appropriate particle size, narrow particle size distribution and good pigment properties.

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Green synthesis of submicron copper powder with narrow particle size distribution via a simple methanol thermal reduction

Dalton Transactions ◽

10.1039/d1dt03464b ◽

2021 ◽

Author(s):

Xiaoping Chen ◽

Jiaqi Fu ◽

Jiangang Li ◽

Bohong Chen ◽

Lei Yang ◽

...

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Green Synthesis ◽

Size Distribution ◽

Copper Powder ◽

Reduction Method ◽

Particle Distribution ◽

Thermal Reduction ◽

Narrow Particle Size Distribution

In this work, submicron copper powder with narrow particle distribution was synthesized via a simple methanol thermal reduction method without using any surfactants. Smaller copper powder with narrower particle size...

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