Microstructure and Microwave Dielectric Properties of Y(Nb1-xTax)O6 (x=0.02-0.1) Ceramics

Microstructure and microwave dielectric properties of the Y(Nb1-xTax)TiO6 (x = 0.02-0.01)ceramics were investigated. The microwave dielectric properties such as dielectric constants, Qxf value, and tau(f) were studied as a function of composition and sintering temperature. The substitution of Ta promotes the microwave dielectric properties. Investigations were made on the structure and microstructure of the X-ray diffraction and scanning electron microscopy. The microwave dielectric properties of pure YNbTiO6 ceramic showed epsilon(r) similar to 17.9, Qxf similar to 51,600 GHz, and tau(f) similar to -53 ppm/degrees C are reported by Joseph et al. We found that a small amount of Ta substitution was effectively increased of the microwave dielectric properties, when x increasing to 0.05, Y(Nb0.95Ta0.05)TiO6 possesses (s(r) similar to 22.03, Qxf similar to 103,600 GHz, and tau(f) similar to -55.90 ppm/degrees C). The materials reported in this paper are excellent in terms of dielectric properties and cost of production compared to commercially available high quality dielectric resonators.