Microwave Plasma Sintering of Low Soda Alumina

Abstract

Sintering of low soda alumina was studied using a high-power 915MHz microwave plasma in N₂-Ar flow at an atmospheric pressure. By using high-density slip carted green body (relative density: 64%), crack free sintered bodies have been obtained within 600s at an input microwave power of 5kw up to final densities higher than 97%. The microwave plasma sintered body shows a fine microstructure and high density compared with a conventionally sintered body.