Phase, microstructure and microwave dielectric properties of A-site deficient (La, Nd)2/3 TiO3 perovskite ceramics

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Abstract

(La, Nd)2/3TiO3 ceramics were prepared through a conventional solid state mixed oxide route. For phase and microstructure analysis, XRD and SEM were used, respectively. Microwave dielectric properties were measured using a network analyzer. XRD patterns revealed the formation of the parent (La, Nd)2/3TiO3 phase along with (La, Nd)4Ti9O24 as a secondary phase. The microstructure consisted of rectangular and needle shaped grains, which decreased in size from 4 μm to 2 μm with an increase in sintering temperature from 1300 °C to 1350 °C. Decrease in grain size caused an increase in density of the samples from 4.81 g/cm3 to 5.17 g/cm3. Microwave dielectric properties of the samples calcined and sintered in air atmosphere were εr = 40.35, Q × f = 3499 GHz and τf = 0 ppm/°C, whereas for a sample calcined in nitrogen and sintered in air they were εr = 40.18, Q × f = 4077 GHz and τf = +4.9 ppm/°C, respectively.

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Saleem, M., Iqbal, Y., Qin, S., Wu, X., & Zhu, F. (2015). Phase, microstructure and microwave dielectric properties of A-site deficient (La, Nd)2/3 TiO3 perovskite ceramics. Materials Science- Poland, 33(1), 126–130. https://doi.org/10.1515/msp-2015-0005

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