Synthesis and microwave characterization of 2(MgO,CaO)-2Al2O3-5SiO2 glass ceramics from the sol-gel process.

The synthesis and microwave characterization of glass ceramic in the quaternary phase field of the MgO-CaO-Al2O3-SiO2 system synthesized by sol-gel method have been investigated in this paper. The glass powder was obtained by calcining the MgO-CaO-Al2O3-SiO2 xerogel, which was prepared from Magnesium nitrate hexahydrate (Mg(NO3)2·6H2O), Aluminum nitrate nonahydrate (Al(NO3)3·9H2O), Calcium nitrate tetrahydrate (Ca(NO3)2·4H2O), and tetraethylortho silicate (TEOS). The powder was characterized by differential thermal analysis, thermogravimety and X-ray diffraction. The calcined powder was pressed, sintered at different temperatures, and then the sintered sample was studied with scanning electron microscope, X-ray diffraction patterns, and microwave properties measurement. [ABSTRACT FROM AUTHOR]