Effect of Sintering Temperature on Structure and Properties of Tailing Porous Ceramics

Abstract:

Tailing porous ceramics that iron tailings as the raw material were prepared by foam-gelcasting method and pressureless sintering process. The effect of sintering temperature on prosity, bulk density, compressive strength, Phase composition, microstructure and pore size distribution. Results show that as sintering temperature increased, porosity declined to 72% from 89%, the volume density and coirpressive strength increased to 0.76 g/cm3 and 6.19MPa respectively. When the sintering temperature is 1100°C, the diffraction peak of Quartz become wider and weak. It means that quartz is melting in liquid phase to increase the density and mechanical properties of tailing porous ceramics. The pore size is uniformly distributed in the 20μm to 70μm as the sintering temperature increases.

Key words:iron tailing; foam-gelcasting method; porous ceramics; sintering temperature; properties