Thermal and mechanical properties of porous ceramics

International Conference and Exhibition on Materials Chemistry

March 31-April 01, 2016 Valencia, Spain

Chaouki Sadik

Hassan II University, Morroco

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Production of porous silica-alumina refractory insulating firebricks from mixtures of silica sand and recycled alumina was investigated. Expanded perlite and saw-dust were added to create the pores. Adding of expanded perlite gives more mechanically stronger refractory (FS:36.7 MPa) but less porosity (p:35.8%) compared to the refractory containing sawdust (FS:29.7 MPa; p:45.8%). The latters are characterized by their lower thermal conductivities (0.53 W/mK). Ultrasonic pulse velocity testing was used for non-destructive quantification of thermal shock damage in refractory samples. The formation of cracks decreases the velocity of ultrasonic pulses travelling in the refractory because it depends on the density and elastic properties of the material. The thermal shock resistance shows the ability of the samples to withstand rapid changes in temperature. Various properties, such as nitrogen adsorption and surface area were also examined.

Biography :

Email: schawki37@gmail.com