Abstract
Two new A6B5O18 type cation-deficient perovskites Ba5LnTi2Nb3O18 (Ln = La, Nd) were prepared by the conventional solid-state reaction route. The phase and structure of the ceramics were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). Both compounds crystallize in the trigonal system. Ba5LaTi2Nb3O18 has a dielectric constant of 56.6, a high quality factors (Q u × f > 16,700 at 4.3331 GHz), and a relatively large temperature coefficient of resonant frequency (τ f ) + 142 ppm°C−1 at room temperature; Ba5NdTi2Nb3O18 has a higher dielectric constant of 47.3 with high quality factors Q u × f > 15,000 at 4.6830 GHz, and τ f + 128 ppm°C−1.
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Fang, L., Zhang, H., Chen, L. et al. Preparation and characterization of new dielectric ceramics Ba5LnTi2Nb3O18 (Ln = La, Nd). J Mater Sci: Mater Electron 16, 43–46 (2005). https://doi.org/10.1007/s10854-005-4957-6
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DOI: https://doi.org/10.1007/s10854-005-4957-6