Mg 결핍에 따른 $Ba(Mg_{1/3}Nb_{2/3})O_3$ 세라믹스의 마이크로파 유전특성

The Effect of Mg Deficiency on the Microwave Dielectric characteristics of $Ba(Mg_{1/3}Nb_{2/3})O_3$ Ceramics

Crystal structure and microwave dielectric properties of $Ba(Mg_{1/3-x}Nb_{2/3})O_3$ (BMN) ceramics were investigated. $Ba(Mg_{1/3}Nb_{2/3})O_3$ has the 1:2 ordered hexagonal structure. The 1:2 ordering and relative density of specimens increased with small Mg deficiency(x). The variation of Q-value with Mg deficiency is very similar to that of 1:2 ordering and relative density. The highest $Q{\times}f_0$ achieved in this investigation is about 96,000 for $Ba(Mg_{1/3-0.02}Nb_{2/3})O_3$. The improvement of Q-value with Mg-deficiency is related to the increase of degree of ordering and relative density of the specimen.