Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 16, Pages 23338-23349Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.05.047
Keywords
Ceramic foams; Ceramic tile polishing waste; SiC
Categories
Funding
- National Natural Science Foundation of China [51704172]
- Inner Mongolia University of Science and Technology Plan [2016QDL-B27, 0903058002]
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By adding borax, the sintering temperature of ceramic foams was reduced and the foaming process was accelerated, resulting in ceramic foams with excellent mechanical properties, suitable for lightweight panels in building applications.
Ceramic foams were prepared from ceramic tile polishing waste and fly ash with borax as a fluxing agent at 925 degrees C. The foaming mechanism of SiC and the effects of borax on the mechanical properties, cellular morphology, and phase composition were investigated. The addition of 18 wt% borax lowered the sintering temperature by 300 degrees C and accelerated the passive oxidation of SiC, thus promoting the foaming process. The optimum ceramic foam obtained at 925 degrees C featured a homogenous porous structure, with an average pore diameter, low bulk density, high compressive strength, and high porosity of 1.20 mm, 0.55 g/cm(3), 7.8 MPa, and 79.4%, respectively. The excellent mechanical properties make ceramic foams potential candidates for lightweight panels for partition walls and ceiling tiles in building applications.
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