Articles
  • Sintering of porous ceramic of diatomite according to molding pressure and PEG content
  • Ye-Na Leea , Seok-Hwan Ahnb Hoseok Namc and Ki-Woo Nama,*
  • a Department of Materials Science and Engineering, Pukyong National University, Busan 48547, Korea b Department of Aero Mechanical Engineering, Jungwon University, Chungbuk 28470, Korea c Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan
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 oC. The compressive strength of the sintered diatomite monoliths increased as the sintering temperature increased, and the molding pressure of 2MPa 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, SiO2, Molding pressure, PEG content, Sintering, Compressive strength.

This Article

  • 2018; 19(6): 467-471

    Published on Dec 31, 2018