Materials Research Bulletin, Vol.89, 150-153, 2017
Compatibility with silver electrode and microwave dielectric properties of low firing CaWO4-2Li(2)WO(4) ceramics
A low firing microwave dielectric ceramic with the composition of CaWO4-2Li(2)WO(4) was prepared by the solid-state reaction method. The phase composition, microstructure and microwave dielectric properties of ceramics were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and network analyzer. The CaWO4-2Li(2)WO(4) ceramics sintered at 740 degrees C for 4h possessed the superior comprehensive performance with relative permittivity (epsilon(r)) of 6.10, quality factor (Qxf) of 62400 GHz and temperature coefficient of resonant frequency (tau(f)) of-100.1 ppm/degrees C. The CaWO4-2Li(2)WO(4) dielectric ceramics were chemically compatible with silver (Ag) electrode, indicating that CaWO4-2Li(2)WO(4) ceramics might be a promising candidate for low temperature co-fired ceramic (LTCC) devices. (C) 2017 Elsevier Ltd. All rights reserved.