Microstructure and properties of porous ceramics synthesized using Kubuqi desert sand

Abstract

Desert sand has the characteristics of large reserves, high quartz content, small and uniform particle size, low organic content and so on. High performance porous ceramic materials were prepared by particle stacking from Kubuqi desert sand, and the effects of forming pressure, holding time and sintering temperature on phase transformation, microstructure, sintering properties, mechanical properties and thermal conductivity of ceramics were investigated. The results show that the high temperature melting of feldspar phase in desert sand binds the quartz particles together to form a stable porous structure ranging from several microns to hundreds of microns, and the decomposition of ferric oxide leads to the formation of closed