Abstract
Abstract The effects of BaCu(B2O5) (BCB) additions on the sintering temperature and microwave dielectric properties of Ba3Ti5Nb6O28 ceramic have been investigated using dilatometer, X-ray diffraction, scanning electron microscopy and dielectric measurement. The pure Ba3Ti5Nb6O28 ceramic shows a high sintering temperature (∼1250 °C) and good microwave dielectric properties as Q × f of 11,400 GHz, ɛr of 37.0, τf of −8 ppm °C−1. It was found that the addition of BCB to Ba3Ti5Nb6O28 could lower the sintering temperature from 1250 to 925 °C. The reduced sintering temperature was attributed to the BCB liquid phase. The addition of BCB also enhanced the microwave dielectric properties to Q × f of 19,191 GHz, ɛr of 38.2, τf of 12 ppm °C−1.
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