| Title |
Structural and Microwave Dielectric Properties of the Mg_{1-x}Sr_xTiO-3 Ceramics with Sintering Temperature and Sr Mole Ratio |
| Authors |
최의선(Choi, Eui-Sun) ; 정장호(Chung, Jang-Ho) ; 유기원(Ryu, Ki-Won) ; 이영희(Lee, Young-Hie) |
| Keywords |
Mg_{1-x}Sr_xTiO-3 ; Quality factor ; Dielectric constant(ε_r) ; Temperature coefficient of resonant frequency(τ_f |
| Abstract |
The Mg_{1-x}Sr_xTiO_3 (x=0.02~0.08) ceramics were fabricated by the conventional mixed oxide method. The sintering temperature and time were 1250°C~1350°C, 2hr., respectively. From the X-ray diffraction patterns, it was found that the perovskite SrTiO_3 and ilmenite MgTiO_3 structures were coexisted in the Mg_{1-x}Sr_xTiO_3 (x=0.02~0.08) ceramics. The dielectric constant( { epsilon}_r) was increased with addition of SrTiO_3. The temperature coefficient of resonant frequency( τ_f) was gradually varied from negative value to the positive value with increasing the SrTiO_3. The temperature coefficient of resonant frequency of the Mg_{1-x}Sr_xTiO_3(x=0.036) ceramics was near zero, where the dielectric constant, quality factor, and τ_f were 20.65, 95120 and +1.3ppm/°C, respectively. |