Abstract
Two new cation-deficient hexagonal perovskites Ba4NdTiNb3O15 and Ba3Nd2Ti2Nb2O15 were prepared in the BaO–Nd2O3–TiO2–Nb2O5 system by high temperature solid-state reaction route. The phase and structure of the ceramics were characterized by X-ray diffraction and scanning electron microscope (SEM). The microwave dielectric properties of the ceramics were studied using a network analyzer. Ba4NdTiNb3O15 has a dielectric constant of 38.15, a high-quality factors (Q u ×f >18 700 at 5.4422 GHz), and a small temperature coefficient of resonant frequency (τ f )+12 ppm °C−1 at room temperature; Ba3Nd2Ti2Nb2O15 has a higher dielectric constant of 46.83 with high-quality factors Q u ×f >19 500 at 5.0980 GHz, and τ f +28 ppm °C−1.
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Fang, L., Diao, C.L., Zhang, H. et al. Preparation and characterization of two new dielectric ceramics Ba4NdTiNb3O15 and Ba3Nd2Ti2Nb2O15 . Journal of Materials Science: Materials in Electronics 15, 803–805 (2004). https://doi.org/10.1023/B:JMSE.0000045303.12402.08
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DOI: https://doi.org/10.1023/B:JMSE.0000045303.12402.08