Magnesite Effect to the Alumina Sintering for Heat Sink Application

Abstract

In the modern world with an extensive improvement of science and technologies, alumina (Al2O3) ceramics have been identified as one of the usable materials in production of electronic components. This project attempts to investigate the magnesite (MgCO3) effect to Al2O3 sintering for heat sink application. The effect of MgO percentage varying from 0% to 50% has been in investigated, emphasizing on the flexural strength test, thermal conductivity test, elastic modulus test, shrinkage percentage and density measurement. The result revealed that the MgO give an effect to the final thermal conductivity and mechanical properties of Al2O3 material at high sintering temperature (i.e. at temperature of 1600°C). Throughout an X-ray diffraction (XRD) analysis of Al2O3 and MgO compositions, it was revealed that spinel, periclase and corundum phases exist for all sintered temperature which contributes to strengthen grain boundaries and improved mechanical properties.