Development of refractory ceramics from residual silica derived from rice husk ash. Issue 9 (15th June 2017)

• Record Type: Journal Article
• Authors: Sobrosa, F.Z.; Stochero, N.P.; Marangon, E.; Tier, M.D.
• Is Part Of: Ceramics international. Volume 43:Issue 9(2017)
• Page Start: 7142
• Page End: 7146
• Publication Date: 2017-06-15
• Subjects: Refractory ceramic -- Kaolin clay -- Silica from rice husk -- Sustainable development -- Renewable energy sources; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.02.147
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Rice husk has been used as a thermal energy source for electricity generation, resulting in the formation of silica from rice husk as a by-product. This research aims to develop refractory ceramic materials by replacing kaolin clay with rice husk silica at 5%, 10% and 20% volume percentages. The samples were investigated in terms of their density, apparent porosity, tensile strength in three-point bending test, compressive strength, thermal shock and mineralogical composition. The use of 20% silica resulted in an increase in the formation of cristobalite, higher packing of granular mixtures, and consequently, an improvement in the tensile strength and compression strength of the samples. However, the material that was most successful in increasing the mechanical strength without decreasing the thermal shock strength was the sample processed with 10% clay replacement by silica from rice husk.