Surface Modification of Mica with TiO2 Powders Prepared by Alkoxide Hydrolysis Method

  1. Prof. Dr. G. Müller
  1. Sang–Pil Han1,
  2. Sang-Hoon Lee1,2 and
  3. Sung-Churl Choi1

Published Online: 27 APR 2006

DOI: 10.1002/3527607293.ch21

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

How to Cite

Han, S., Lee, S.-H. and Choi, S.-C. (2000) Surface Modification of Mica with TiO2 Powders Prepared by Alkoxide Hydrolysis Method, in Ceramics - Processing, Reliability, Tribology and Wear, Volume 12 (ed G. Müller), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607293.ch21

Editor Information

  1. Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, 97082 Würzburg, Germany

Author Information

  1. 1

    Department of Inorganic Materials Eng., Hanyang Univ., Seoul, Korea

  2. 2

    Technology & Research Institute of KORES, Seoul, Korea

Publication History

  1. Published Online: 27 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301942

Online ISBN: 9783527607297

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Keywords:

  • ceramics;
  • surface modification of mica;
  • TiO2 powder;
  • alkoxide hydrolysis method

Summary

TiO2 powder was adsorbed on the surface of mica using the heterocoagulation method in water. TiO2 powder was prepared from hydrolysis of titanium-iso propoxide in a mixed solvent of anhydrous ethanol and water. When the molar ratio of water to titanium isopropoxide was 0.25, monodispersed spherical TiO2 particles were obtained. The prepared TiO2 powder showed anatase phase after heat treatment at 500 °C for 2 h and then fully transformed to rutile phase after heat treatment at 1000 °C for 2 h. The iso-electric point of TiO2 and mica were pH 3.9 and pH 3.25, respectively, which were measured by Z-potential analysis in water base. The maximum Z-potential difference between two powders was observed in the range of pH 3.6∼3.7. TiO2 powder was adsorbed on the surface of mica by heterocoagulation method in pH 3.6∼3.7. The properties of prepared TiO2 powder was characterized by XRD, SEM, etc. The color change and SPF (Sun Protection Factor) indices of TiO2-adsorbed mica were examined.