Porosity–Strength Correlations in Ceramic Raschig Ring: Effects of Sintering Temperature and Water Content

Abstract

The relationship between compressive strength and porosity of extruded ceramic Raschig ring has been investigated. First, the experiments have been carried out at different soaking temperatures to obtain optimum condition, reaching minimum total porosity and maximum strength. Second, in order to compare the effect of powder moisture on strength, the specimens were extruded with different water content. The dried specimens were sintered at optimum temperature according to first step result. In conclusion the maximum strength was achieved when the ceramic packings were shaped by 20–25 wt% water content and sintered at 1200°C.

Effect of Sintering Temperature and AR Glass Addition towards Physical Properties of Porcelain Ceramic for Sewer Pipes Application

“…The formation of glassy phase can be seen a lot which closes the open pores. This is due to the melting of the AR glass resulting high viscosity in liquid phase to penetrated the pores and separate neighbor pores [17]. The result is correlated with TG and DT graph where mass gained cause by vitrification process as well as endothermic reaction occurrence.…”

“…Moreover, the incomplete grain growth triggered a scatter quartz formation which can be correlated with the result of volume shrinkage. Lower sintering temperature reduce the interaction of particle-particle and creates the separation distance between particle which produce a void [17]. Less contact of particle resulting low shrinkage occurrence to the whole sample.…”

Effect of the plant waste onto the properties of use and the microstructure of phyllosilicates based ceramics

“…The compressive strength and the thermal conductivity increased significantly above this temperature (Figures 8A and 9A), thanks to the decreased in open porosity decreased combined with the crystallization of mullite occurring in these samples (see supplemental date S4). In general, the shrinkage of ceramic products would occur during the sintering process, consequently to the elimination of the open pores, which would favor their densification 51,52 . In Figures 8B and 9B, the addition of MP favored, in almost all cases, the creation of pores in the manufactured products, except for the 5 mass% MP with NZ1 clay where the porosity was slightly decreased.…”

Relationship Between Powder Composition and Single Screw Extrusion for Manufacturing Reliable Random Ceramic Packed Bed According Statistical Approach

“…If the stress intensity reaches a critical level at the crack tip, fracture occurs immediately [8]. Ceramic bodies indicate considerable variation in strength, due to their extreme sensitivity to the presence of defects with different sizes like pores [9]. The fracture of body starts from critical flaws and always propagates from the largest flaw, favorably oriented in the tensile stress direction [10,11].…”

“…The ceramic bed compositions at least consist of three components that play the fundamental roles in processing and performance of chemical units. Kaolin, for plasticity [9,12], nepheline syenite [13,14] or talc [15] with limited content as fluxing agents and alumina and zirconium silicate [16] as fillers were applied. After suitable processing, these formulations should lead to a matrix with high strength and appropriate chemical resistance [7,16].…”