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Structure and microwave dielectric properties of Ca0.66La0.387Ti0.88O3 ceramics

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Abstract

Ca0.66La0.387Ti0.88O3 microwave dielectric ceramics were prepared via a mixed oxide solid state sintering route and characterized. X-ray diffraction revealed the formation of single phase Ca0.66La0.387Ti0.88O3 ceramics with orthorhombic (Pbnm) symmetry within the detection limit of the in-house XRD facility. Raman spectroscopy revealed the presence of seven Raman active bands evident of orthorhombic symmetry, in agreement with the present X-ray diffraction results. The microstructure of sintered samples appeared almost dense with some occasional pores. Ca0.66La0.387Ti0.88O3 exhibited reasonable relative permittivity (~71.5) and quality factor (~13,407 GHz); however, its temperature coefficient of resonance frequency was high (~136.4 × 10−6/°C) for commercial applications and requires further optimization.

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Acknowledgments

The laboratory support extended by Prof. I.M. Reaney and his group, Electro-ceramics Laboratory, Department of Material Science and Engineering, University of Sheffield (UK) for microwave properties measurements, is highly acknowledged. The authors acknowledge the financial support (ADP# 130314) of the Khyber Pakhtunkhwa Government through the Directorate of Science and Technology, KP for the up-gradation of Materials Research Laboratory, University of Peshawar.

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  1. Materials Research Laboratory, Department of Physics, University of Peshawar, Peshawar, 25120, Pakistan

    Raz Muhammad & Yaseen Iqbal

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  1. Raz Muhammad
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  2. Yaseen Iqbal
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Correspondence to Yaseen Iqbal.

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Muhammad, R., Iqbal, Y. Structure and microwave dielectric properties of Ca0.66La0.387Ti0.88O3 ceramics. J Mater Sci: Mater Electron 26, 9092–9096 (2015). https://doi.org/10.1007/s10854-015-3596-9

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  • DOI: https://doi.org/10.1007/s10854-015-3596-9

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