BaMnV2O7：A novel microwave dielectric ceramic for LTCC applications

A novel low-temperature fired BaMnV 2 O 7 ceramic was fabricated with solid-state reaction. Rietveld refinements based on X-ray diffraction data and TEM analysis indicated that BaMnV 2 O 7 exhibited a monoclinic structure with a P21/n space group. The dense microstructure of the BaMnV 2 O 7 ceramic obtained at 850 °C was examined by scanning electron microscopy. The increasing content of V 4+ affected the quality factor, which was confirmed by X-ray photoelectron spectroscopy. The intrinsic dielectric properties were obtained from far infrared reflectivity spectra. Additionally, the BaMnV 2 O 7 ceramic showed good chemical stability with a Ag electrode and desirable microwave dielectric performance at 850 °C: ϵ r  = 11.7, Q × f =20040 GHz and τ f  = −48.2 ppm/°C, which can potentially be applied in LTCC technology.