Environment‐oriented low‐cost Al₂O₃ ceramics with hierarchical pore structure fabricated from SiC solid waste

Abstract

Environment‐oriented low‐cost Al2O3 reticulated porous ceramics with hierarchical pore structure were fabricated by the polymer sponge replica method combined with vacuum infiltration methods, using Al2O3 powders and SiC solid waste (SCSW) as raw material and a pore‐forming agent. The effects of SCSW addition amount on mechanical properties, microstructure and pore size of Ceramics were investigated. The results showed that the thermal shock resistance of specimens increased gradually with addition of SCSW, however, the median pore diameter increased firstly and then decreased, due to the generation of mullite and liquid phase. After calcination, the residual stress was generated within the coating layer because of the difference in the thermal expansion coefficients of ceramic matrix and coating layer, which could improve the properties of Ceramics by deflecting and bifurcating crack growth path. The results showed that the best dosage of SCSW was 30 wt%.

Utilization of industrial wastes in Al2O3‐SiC‐SiO2‐C refractories: Characterization of erosion and corrosion resistance

“…[6][7][8][9] On the other hand, the waste primarily consists of oxides, which are comparable to the components of refractories; hence, using waste in refractories is a viable alternative. [10][11][12][13] Furthermore, due to the high-cost of raw materials, there is a trend to use low-cost industrial waste in refractories by partially replacing expensive commercial raw material for blast furnaces, kilns, and incinerators, particularly during the current recession. 14,15 Kumar et al 16,17 used ferro-chromium slag as aggregate to prepare a castable refractory with great compressive strength values using.…”

“…Numerous literatures on industrial waste utilization in partial substitution of concrete for construction have been reported for replacement applications 6–9 . On the other hand, the waste primarily consists of oxides, which are comparable to the components of refractories; hence, using waste in refractories is a viable alternative 10–13 . Furthermore, due to the high‐cost of raw materials, there is a trend to use low‐cost industrial waste in refractories by partially replacing expensive commercial raw material for blast furnaces, kilns, and incinerators, particularly during the current recession 14,15 .…”

3D printing of fibre-reinforced ceramic composites with hierarchical structure

“…Several methods had been used to resolve the inherent brittleness issues, including (1) incorporation of reinforcement material (fibres or granular powder) within the ceramic matrix [1], (2) hierarchical porous ceramics structures [2,3], (3) laminated composite materials, [4] (4) phase transformation toughening induced by applied stress [5], (5) nanocrystalline ceramics material [6], and (6) microcrack toughening [7]. For this paper, we will be focusing on the incorporation of reinforcement material and hierarchical structure within the ceramic matrix.…”

Utilization of both Electronical Manganese Slag and Silicate Tailings as Raw Materials for Fabrication of Cost-effective Porous Ceramics

“…Therefore, the safe utilization of tailings and metallurgical slags as alternative raw materials of CPCs are of great concerns [11]. Up to now, many researchers have found that CPCs with better performance could be obtained by applying different industrial solid wastes as raw materials and supplementing appropriate additive components to adjust the contents of variant chemicals ) [12][13][14][15].…”