첨가물에 따른 $ZnNb_2O_6$ 세라믹스의 마이크로파 유전특성

The Microwave Dielectric Properties Of $ZnNb_2O_6$ Ceramics With Addition

The $ZnNb_2O_6$ ceramics with 5wt% CuO and $B_2O_3$(1,3,5wt%) were prepared by the conventional mixed oxide method. The ceramics were sintered at the temperature of $950^{\circ}C{\sim}1025^{\circ}C$ for 3hr. in air. The structural properties were investigated with sintering temperature and $B_2O_3$ addition by XRD and SEM. Also, the microwave dielectric properties were investigated with sintering temperature and $B_2O_3$ addition. Increasing the sintering temperature, the peak of second phase ($Cu_3Nb_2O_6$) was increased. But no significant difference was observed as the $B_2O_3$ addition, In the $ZnNb_2O_6$ ceramics with 5wt% CuO and 5wt% $B_2O_3$ sintered at $975^{\circ}C$ for 3hr, the dielectric constant, quality factor, temperature coefficient of the resonant frequency were 19.30, 14,662GHz, $+4.18ppm/^{\circ}C$, respectively.