Microwave dielectric properties of MgTiO/sub 3/-BaTiO/sub 3/ ceramics

Abstract

The (1-x)MgTiO/sub 3/-xBaTiO/sub 3/(X=0.02/spl sim/0.1) ceramics were fabricated by the conventional mixed oxide method. The structural and microwave dielectric properties were investigated by the XRD, SEM, EDS and network analyzer. The sintering temperature and time were 1275/spl deg/C-1350/spl deg/C, 2 hours, respectively. In the XRD results of (1-x)MgTiO/sub 3/-xBaTiO/sub 3/ ceramics, the hexagonal BaMg/sub 6/Ti/sub 6/O/sub 19/ and ilmenite MgTiO/sub 3/ structures were coexisted. In the case of the 0.9MgTiO/sub 3/-0.1BaTiO/sub 3/ ceramics sintered at 1325/spl deg/C, dielectric constant, quality factor and temperature coefficient of resonant frequency were 32.67, 32665, -84.5 ppm//spl deg/C, respectively.