Thermal and mechanical behavior of ZrTiO4-TiO2 porous ceramics by direct foaming

This paper reports the production of micro porous ceramics consisting of TiO2 and ZrO2 by direct foaming. ZrO2 particles in a colloidal suspension were partially hydrophobized using propyl gallate as an amphiphile at a suitable pH range of around 3.5–4.5. A TiO2 suspension with different mole ratios...

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Bibliographic Details
Published inCeramics international Vol. 42; no. 13; pp. 14395 - 14402
Main Authors Bhaskar, Subhasree, Park, Jung Gyu, Lee, Kee Sung, Kim, Suk Young, Kim, Ik Jin
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.10.2016
Subjects
Direct foaming
Hertzian indentations
Quasi-plastic behavior
Thermal hysteresis
ZrTio4-Tio2 porous ceramics
Quasi-plastic behavior
ZrTio4-Tio2 porous ceramics
Direct foaming
Thermal hysteresis
Hertzian indentations
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Summary:This paper reports the production of micro porous ceramics consisting of TiO2 and ZrO2 by direct foaming. ZrO2 particles in a colloidal suspension were partially hydrophobized using propyl gallate as an amphiphile at a suitable pH range of around 3.5–4.5. A TiO2 suspension with different mole ratios was added to the surface modified ZrO2 suspension to obtain ZrTiO4-TiO2 porous ceramics in the sintered sample. The influence of the TiO2 content and calcination temperature on the phase transformation, microstructure, and thermal properties of the materials was determined by thermal analysis, X-ray diffraction, field emission scanning electron microscopy, and dilatometry. The crystallization of ZrTiO4 (orthorhombic) was observed at 1100°C on the thermal hysteresis curve due to anisotropic thermal expansion. The compressive load and displacement of the sintered porous ceramics samples were calculated using the Hertzian indentation method.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2016.06.019