Abstract
In our previous study, Ba3P4O13 ceramic was found to exhibit good microwave dielectric performance with a low permittivity (εr), a high Q × f (Q = 1/dielectric loss, f = resonant frequency) value but a large positive τf value (TCF, temperature coefficient of resonant frequency), which limits its application in low-temperature co-fired ceramic (LTCC) technology. BaCu(B2O5) (BCB) additions were selected in this study to adjust τf value of Ba3P4O13 ceramic samples. It was found that as BCB contents increased, sintering temperatures decreased from 840 °C (without BCB addition) to 820 °C (with 2 wt. % BCB), meanwhile τf values of ceramic samples were reduced from + 48 ppm/ °C to − 2 ppm/ °C. Moreover, BCB added Ba3P4O13 ceramic showed a good chemical compatibility with Cu electrode. These results indicate that BCB added Ba3P4O13 ceramics are promising candidate for LTCC applications.
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