| Title |
Microwave Dielectric Properties of the (1-x)Mg_4Ta_2O_9-x(TiO_2, CaTiO_3, SrTiO_3) Ceramics |
| Authors |
김재식(Kim, Jae-Sik) ; 최의선(Choi, Eui-Sun) ; 배선기(Bae, Seon-Gi) ; 이영희(Lee, Young-Hie) |
| Keywords |
Mg_4Ta_2O_9 ; High Quality Factor ; TiO_2 ; MgTi_2O_5 ; (Ca, ; Sr)TiO_3 |
| Abstract |
The effect of x on microwave dielectric properties of the (1-x)Mg_4Ta_2O_9-x(TiO_2, CaTiO_3, SrTiO_3) ceramics for microwave components were investigated. All spcecimens prepared by the conventional mixed oxied method and sintered at 1450°C. Microwave dielectric properties of the (1-x)Mg_4Ta_2O_9-xTiO_2 ceramics were influenced by MgTi_2O_5 phase. Also the microwave dielectric properties of the (1-x)Mg_4Ta_2O_9-x(TiO_2, CaTiO_3, SrTiO_3) ceramics were dominated with an addition of CaTiO_3 and SrTiO_3. The dielectric constant (ε_r), quality factor (Q×f_r) and temperature coefficient of the resonant frequency (TCRF, τ_f) of the (1-x)Mg_4Ta_2O_9-x(TiO_2, CaTiO_3, SrTiO_3) ceramics were 12.96 sim70.98, 5,132 sim186,410GHZ and -35.82 sim+75.96ppm/°C, respectively, and depend on x and addition materials. |