| Title |
The Microwave Dielectric Properties of ZnNb_2O_{6} Ceramics with Sintering Temperature and CuO Addition |
| Authors |
김정훈 ; 김지헌 ; 배선기 ; 이성갑 ; 이영희 |
| Keywords |
Dielectric constant ; Quality factor ; ZnNb_2O_{6} ; CuO ; Sintering temperature |
| Abstract |
The ZnNb_2O_{6} ceramics with CuO(1, 3, 5wt%) were prepared by the conventional mixed oxide method. The ceramics were sintered at the temperature of 950°C∼1075°C for 3hr in air The structural properties and the microwave dielectric properties of ZnNb_2O_{6} ceramics were investigated with sintering temperature and the addition of CuO. Increasing the addition of CuO, the peak of second phase(Cu_3Nb_2O_{8}) was increased. The grain size of the ZnNb_2O_{6} ceramics with CuO was increased with CuO addition at same temperature. The dielectric constant of ZnNb_2O_{6} ceramics with CuO was increased with sintering temperature and CuO addition. While the quality factor of the ZnNb_2O_{6} ceramics with lwt% CuO depended on sinterability, the quality factor of ZnNb_2O_{6} with 3wt% and 5wt% CuO depended on second Phase due to the CuO addition. The optimum dielectric Properties of ε_{r} = 21.73 Q×f = 19,276 were obtained from the condition of 3wt% CuO addition and sintering temperature of 1025°C(3hr). |