This paper reports the effect of the particle size of LiAlSiO4 on the thermal expansion and Young's modulus of low thermal expansion (LTE) coefficient of porous materials using silicon carbide (SiC), vitrified bonding material (VBM) and lithium aluminum silicate (LiAlSiO4) at 850 oC. According to the XRD results, there is no reaction between the raw materials during the sintering process. SEM analysis revealed the presence of an internal porous structure with a pore size less than 4 micrometers. It was found that decreasing the particle size of LiAlSiO4 by almost 4 times reduces the porosity, keeping a low thermal expansion coefficient, but the Young's modulus increases 50%.

Keywords: LiAlSiO4, Low Thermal Expansion (LTE), SiC, Porous Materials.