Microwave Dielectric Properties and Microstructures of RETiNbO₆ (RE=La, Sm and Y)

Abstract:

Microwave dielectric ceramics Y(Nb_0.5Ti_0.5)₂O₆, SmTiNbO₆, LaTiNbO₆ have been prepared by conventional solid state method. The single phase of these three kind of samples are obtained at 1350°C, 1340°C and 1280°C, respectively. SmTiNbO₆ has positive τf (50.05ppm/°C) and Y(Nb_0.5Ti_0.5)₂O₆ (-64.27ppm/°C), LaTiNbO₆ have negative τf (-67.39ppm/°C). Dielectric constant, quality factor and temperature coefficient of resonant frequency increase with the increased sintering temperature firstly and then decrease which is due to the lower density. Dense Y(Nb_0.5Ti_0.5)₂O₆, SmTiNbO₆ ceramics are obtained at the proper sintering temperature but for LaTiNbO₆ ceramics there are many pores on the grain surface.

• Periodical: Advanced Materials Research (Volumes 197-198)
• Pages: 285-289
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.197-198.285
• Online since: February 2011
• Authors: Yan Lei, Ian M Reaney, Ying Cai Liu, Yan Sheng Yin, Guo Hua Chen
• Keywords: Dielectric Property, Microwave Ceramics, Rare-Earth Titanium Niobate, Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD)

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