Investigation of Temperature Parameter on the Sinterability of Magnesia

A sintering procedure in constant heraus muffle furnace was carried out at an interval of 1600-1900 oC for 50 min dwelling time and 5 oC min-1 cooling rate to improve the grain growth of magnesia. The effects of temperature on the grain growth and microstructural examination of samples were investigated by using Scanning Electron Microscopy (SEM). The average grain size was also determined separately by an intercept measurement method. According to the findings, crystal size and bulk density were enhanced significantly as a linear relationship with the increasing temperature. For the samples sintered at 1900 oC, a maximum average grain growth (~100μm) has been obtained. In this paper, the effects of temperature on the crystal size and bulk density of the treated magnesia and its marketability were evaluated