Abstract
The effects of <TEX>$B_2O_3$</TEX> addition on the low-temperature sintering behavior and microwave dielectric properties of <TEX>$(Zn_{0.8}Mg_{0.2})TiO_3$</TEX> ceramic system were investigated. Highly dense samples were obtained at the sintering temperatures below <TEX>$900^{\circ}C$</TEX>. The <TEX>$Q{\times}f_o$</TEX> values were determined by the microstructures and sintering shrinkages which are affected by the amount of <TEX>$B_2O_3$</TEX> and sintering temperature. Temperature coefficient of resonance frequency(<TEX>$T_f$</TEX>) changes to a positive value with increasing the amount of <TEX>$B_2O_3$</TEX> due to the increased amount of rutile phase which is one of the reaction products between <TEX>$(Zn_{0.8}Mg_{0.2})TiO_3$</TEX> and <TEX>$B_2O_3$</TEX>. For <TEX>$6.19 moi.{\%}B_2O_3$</TEX>-added <TEX>$(Zn_{0.8}Mg_{0.2})TiO_3$</TEX> system, it exhibits <TEX>${\epsilon}_r$</TEX> = 23.5, <TEX>$Q{\times}f_o$</TEX> = 53,000 GHz, and <TEX>$T_f$</TEX> = 0 ppm/<TEX>$^{\circ}C$</TEX> when sintered at <TEX>$900^{\circ}C$</TEX> for 5 h.
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