| Title |
Microwave Dielectric Properties of the MgTiO_3-SrTiO_3 Ceramics |
| Authors |
배경인 ; 이상철 ; 최의선 ; 배선기 ; 이영희 |
| Keywords |
Perovskite structure ; Ilmenite structure ; Dielectric constant(ε(sub)γ) ; Quality factor ; Temperature coefficient of resonant frequency(τ(sub)f) |
| Abstract |
The(1-x) MgTiO_3-xSrTiO_3(x=0.03~0.04) ceramics were fabricated by the conventional mixed oxide method. The structural and microwave dielectric properties were investigated by XRD, SEM, EDS and network analyzer. The sintering temperature and time were 1275°C~1350°C and 2hours, respectively. In the XRD results of 0.96MgTiO_3-0.04SrTiO_3ceramics, the perovskite structure of SrTiO_3and ilmenite structure of MgTiO_3phase were coexisted. The dielectric constant(ε(sub)γ) and temperature coefficient of resonant frequency(τ(sub)f) were increased with addition of SrTiO_3. In thie case of 0.96MgTiO_3-0.04SrTiO_3 ceramics sintered at 1325°C, the dielectric constant, quality factor(Q) and temperature coefficient of resonant frequency(τ(sub)f) were 20.13, 7956(at 7.27GHz), and +1.76ppm/°C, respectively. |