| || Alumina-based Ceramic Material for High-voltage Ceramic Substrate
Author : Sangawar, S.R.;Kumar, H.H.
Source : Defence Science Journal ; Vol:56(2) ; 2006 ; pp 269-278
Subject : 620.1 Material Science and Technology;669 Metallurgy
Keywords : Alumina;Silica;Magnesium oxide;Particle size;Surface area;Green density;Sintered density;Dielectric strength;Dielectric constant
Abstract : The paper presents the study of the particle size distribution, surface area and their effect on sintering of alumina (Al2O3) using additives such as magnesium oxide (MgO) and silica (SiO2), so that the samples could be sintered to high relative density (~ 97.43 %) with controlled grain growth. However, the use of MgO along with SiO2 on Al2O3 produced the powder compacts having high Green density, sintered density with minimum porosity to achieve high dielectric strength ceramic material, so that material can be used for high-voltage insulator applications.