| Title |
Structural and Microwave Dielectric Properties of the 0.9MgTiO_3-0.1SrTiO_3 Ceramics with Sintering Temperature |
| Authors |
최의선(Choe, Ui-Seon) ; 이문기(Lee, Mun-Gi) ; 류기원(Ryu, Gi-Won) ; 배선기(Bae, Seon-Gi) ; 이영희(Lee, Yeong-Hui) |
| Keywords |
Microwave Dielectric Ceramics ; 0.9MgTiO_3-0.1SrTiO_3 Dielectric Constant ; Quality Factor ; Temperature coefficient of resonant frequency(τf) |
| Abstract |
The MgTiO_3 and 0.9MgTiO_3-0.1SrTiO_3 ceramics were fabricated by the conventional mixed-oxide method. The sintering temperature and time were 1300°C~1600°C, 2hr., respectively. The structural and microwave dielectric properties were investigated with sintering temperature and the application for the satellite communication microwave dielectric resonator was investigated. The coexistence of cubic SrTiO_3 and hexagonal TEX> MgTiO_3 structures in 0.9MgTiO_3-0.1SrTiO_3 ceramics were found from X-ray diffraction patterns. In the case of MgTiO_3 ceramics, sphere phase and needle-like phase were coexisted. The 0.9MgTiO_3-0.1SrTiO_3 ceramics observed sphere phase. The dielectric constants and temperature coefficient of resonant frequency(τf) were increased with addition of SrTiO_3 but the quality factor was decreased. The dielectric constant, quality factor and τf of the;0.9MgTiO_3-0.1SrTiO_3 ceramics were 22.61, 10.928(at 1GHz) and +50.26ppm/°C, respectively. |