Abstract
Abstract The effects of B 2 O 3 addition on the sintering behavior, microstructure, and the microwave dielectric properties of Mg(Zr 0.05 Ti 0.95 )O 3 (MZrT) ceramics have been investigated. The results of X-ray diffraction (XRD) indicate the presence of six crystalline phases, Mg(Zr 0.05 Ti 0.95 )O 3 , Mg 0.25 Zr 0.38 Ti 0.38 O 1.75 , Mg 2 TiO 4 , MgTi 2 O 5 , TiO 2 , and (Mg,Ti) 2 (BO 3 )O, in the sintered ceramics, depending on the amount of B 2 O 3 added. It was found that the firing temperature required to make the Mg(Zr 0.05 Ti 0.95 )O 3 ceramics dense is lowered by increasing the B 2 O 3 content. The τ f value of the Mg(Zr 0.05 Ti 0.95 )O 3 with B 2 O 3 glass was also improved dramatically. Addition of 1.5 wt% B 2 O 3 glass lowers the sintering temperature of Mg(Zr 0.05 Ti 0.95 )O 3 from 1420 to 1270 °C, with relatively high Q × f = 108,000 (GHz), ɛ r of 17.6, and of low τ f = −2 ppm/°C.
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