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



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.


Microwave Dielectric Property Dielectric Resonator Orthorhombic Symmetry Optimum Sinter Temperature Secondary Electron Scanning Electron Microscope 
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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.

Compliance with ethical standards

Conflict of interest

We have no potential conflict of interest.


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© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Materials Research Laboratory, Department of PhysicsUniversity of PeshawarPeshawarPakistan

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