Articles
  • Al2O3-TiO2 porous ceramics from particle-stabilized wet foam by direct foaming
  • Subhasree Bhaskara, Dong Nam Seoa, Jung Gyu Parka, Gae Hyung Choa, Byung Ho Kangb, Tae Young Limc and Ik Jin Kima,*
  • a Institute of Processing and Application of Inorganic Materials, (PAIM), Department of Advanced Material Science and Engineering, Hanseo University # 46, Hanseo 1-ro, Haemi-myeon, Seosan-si, Chungcheongnam-do, 356-706, Korea b Hanyoung Foreign Language High School, # 832, Dongnam-ro, Gangdong-gu, Seoul, 134-837, Korea. c Optic& Display Materials Team, Korea Institute of Ceramic Engineering and Technology (KICET), #101, Soho-ro, Jinju-si, Gyeongsangnam-do, 660-031, Korea
Abstract
Al2O3-TiO2 porous ceramics has been a focus of research due to its unique electric, thermal and mechanical properties. This study is a novel approach for the production of microporous ceramics consisting of Al2O3 and TiO2 fabricated by direct foaming. The colloidal Al2O3 suspension was partially hydrophobized using propyl gallate as an amphiphile at pH 4.75. The different mole ratios of the TiO2 suspension was added to the surface modified Al2O3 suspension. The contact angle was found to be around 60 ~ 65 o with the wet foam stability of about 90% at the mole ratio of 1 : 1. The free energy corresponds to 3.5 × 108 kT including the Laplace pressure of about 2.2 mPa at the same mole ratio.

Keywords: Porous ceramics, Direct foaming, Adsorption free energy, Laplace pressure, Wet process.

This Article

  • 2015; 16(5): 643-647

    Published on Oct 31, 2015

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