Low-temperature sintering and dielectric properties of (Zn _1-x,Mg_x)TiO₃ ceramics

The dielectric ceramics comprised of (Zn_1-xMg _x)TiO₃ (x=0.1-0.5, abbreviated to ZMT) were developed by conventional mixed-oxide method combined with a semi-chemical processing. V ₂O₅ was used as sintering aids to lower the sintering temperature of ceramics. The results showed that the hexagonal phase stability region extended from 900 to 1150°C as the amount of magnesium increased. The densification temperature of ZMT ceramics could be reduced from 1200 to 875°C by V₂O₅ additions and using semi-chemical processing, the relative density of ZMT ceramics with 1.00wt% V ₂O₅ addition reach 95% at 875°C The dielectric properties of ZMT were measured at different frequencies and the results showed that there existed a decreasing tendency of the loss tangents (tg δ) with increasing measuring frequency. It is concluded that ε_r=22 and tg δ = 5.7×10^-4 can be obtained for ZMT ceramics at sintering temperature 875°C.