Effect of ball milling on reactive microwave sintering of MgO-TiO۲ System

Abstarct  In this paper, effect of mechanical activation on microwave reactive sintering of MgO - TiO۲ system was investigated. Mixtures of MgO and TiO۲ were milled at different times. Mixed powders along with ۱۰ h milled powders were chosen for microwave sintering between ۱۰۰۰- ۱۴۰۰⁰C. Results showed that increasing of temperature up to ۱۴۰۰̊C for mixed powders could not give rise to complete formation of Magnesium titanate phases and raw materials were in the products. Also the densities of these samples were about ۳ g/Cm۳. With milling of reactants up to ۱۰ h, it seems reactions could be completed at ۱۰۰۰⁰C and the density was augmented to ۳.۵۸ g/Cm۳. The samples were sintered at ۱۴۰۰⁰C in a microwave furnace exhibited good microwave dielectric properties while εr and tan δ were ۱۶.۳ and ۰.۰۰۰۱ respectively.

کلیدواژه ها:

Mechanical milling ، MgTiO۳ ، Microwave sintering