Properties of glasses based on the CaO–MgO–SiO2 system for low-temperature co-fired ceramic

Glass compositions based on the CaO–MgO–SiO2 system are investigated with an aim to increase the coefficient of thermal expansion (CTE) in a low-dielectric constant layer material for low-temperature co-fired ceramics (LTCC). The effect of changing the glass composition on the CTE is examined by the addition of ZnO, Al2O3, BaO, and SrO. X-ray diffraction (XRD) results show that CaMgSi2O6 is the major crystalline phase of all sintered samples except for one composition. According to the experimental results, the substitution of BaO and SrO for CaO plays an important role in increasing the CTE.