ZrTiO4 porous ceramics fabricated from particle-stabilized wet foam by direct foaming
Year: 2016
Journal: J. Korean Phys. Soc.
Authors: Bhaskar, S; Park, JG; Kim, IJ; Kang, BH; Lim, TY
Indent ZrTiO4 ceramics are widely used to manufacture electrical and optical devices. This study reveals an approach for the production of micro-porous ceramics consisting of TiO2 and ZrO2 by using a direct foaming method. ZrO2 particles in a colloidal suspension were partially hydrophobized by using propyl gallate as an amphiphile in a suitable pH range. Different mole ratios of the TiO2 suspension were added to the surface-modified ZrO2 suspension. The contact angle was found to be around 54A degrees and the adsorption free energy to be 1.68 x 10(-11) similar to 9.2 x 10(-12) J center dot A Laplace pressure of about 2.0 similar to 2.2 mPa, corresponding to a wet foam stability of about 80 similar to 85% was determined. A microstructure analysis was done after the dried samples had been sintered to obtain porous ceramics.
