Sintering and Dielectric Properties of Ba2Ti9O20Microwave Ceramics by Glass Addition

MgO–CaO–SiO2–Al2O3(MCAS) glass, which is fabricated by the sol-gel method, is selected as the sintering aid of Ba2Ti9O20ceramics. The effect of adding glass on the sintering and dielectric properties of Ba2Ti9O20ceramics is investigated. The crystalline phases of MCAS- Ba2Ti9O20ceramics are Ba2Ti9O20and cordierite. As the content of MCAS glass increases, the density curve is shifted to lower sintering temperature. For the densified MCAS- Ba2Ti9O20ceramics, the dielectric constants (at 1 MHz) decrease with increasing MCAS glass content.