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Sintering of porous ceramic of diatomite according to molding pressure and PEG content  

Lee, Ye-Na (Department of Materials Science and Engineering, Pukyong National University)
Ahn, Seok-Hwan (Department of Aero Mechanical Engineering, Jungwon University)
Nam, Hoseok (Graduate School of Energy Science, Kyoto University)
Nam, Ki-Woo (Department of Materials Science and Engineering, Pukyong National University)
Publication Information
Journal of Ceramic Processing Research / v.19, no.6, 2018 , pp. 467-471 More about this Journal
Abstract
Diatomite powder, a naturally occurring porous raw material, was used to make ceramic materials with porosity and high strength. The sintering behavior of the diatomite powder at various sintering temperatures suggests that diatomite monoliths with a high porosity and strength can be prepared at $1100^{\circ}C$. The compressive strength of the sintered diatomite monoliths increased as the sintering temperature increased, and the molding pressure of 2 MPa and the binder of 18.6 wt.% were excellent. When the sintering temperature rises, the diatomite powder is melted, and its pores gradually disappear. SEM images show that strengthening begins with the formation of inter-particle bonds at a low sintering temperature.
Keywords
Diatomite; $SiO_2$; Molding pressure; PEG content; Sintering; Compressive strength.;
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