journal article·2016-05

Impedance Spectroscopy, Broadband, and Microwave Dielectric Properties of Mechanically Alloyed Ba 5 Nb 4 O 15 Ceramics

Chikkala Anil Kumar, Sylvester Josephine, Dobbidi Pamu

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Abstract

Ba 5 Nb 4 O 15 ( BNO ) ceramics were synthesized by the mechanical alloying method. The transmission electron microscope images of BNO powders revealed rod‐shaped grains. Mechanically alloyed BNO exhibited maximum density of 97.3% and is explained on the basis of Herring's scaling law. Both the dielectric constant and loss tangent show a stable response up to 0.2 GH z. Further, the dielectric response of BNO ceramics measured above 350°C shows relaxation behavior and is explained using Havriliak–Negami equation. The obtained stable dielectric response of BNO is suitable for type I capacitor and dielectric resonator applications.
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Research context

OpenAlex topics: Microwave Dielectric Ceramics Synthesis · Ferroelectric and Piezoelectric Materials · Dielectric properties of ceramics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics Indian Institute of Technology Guwahati Guwahati 781039 India

Department of Electronics and Electrical Engineering Indian Institute of Technology Guwahati Guwahati 781039 India

Funding

Department of Science and Technology, Republic of South Africa

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