Effect of microwave sintering on the structural, optical and electrical properties of BaTiO3 nanoparticles

Vasudevan, R and Karthik, T and Selvakumar, D and Ganesan, S and Jayavel, R (2014) Effect of microwave sintering on the structural, optical and electrical properties of BaTiO3 nanoparticles. Journal of Materials Science: Materials in Electronics, 25 (1). pp. 529-537. ISSN 0957-4522

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Abstract

BaTiO3 nanoparticles were prepared by high energy ball milling and subjected to conventional and microwave post sintering at 1, 000 °C. From the powder X-ray diffraction results, the synthesized material exhibits strong tetragonality with large c/a ratio. Scanning electron microscope results show the formation of tetragonal shaped BaTiO3 crystals in the nanometer scale and a significant reduction in the particle size for the microwave sintered sample. The reduced d-spacing of 1.741 å with high crys-tallinity for the microwave sintered material is revealed by high resolution transmission electron microscopy analysis. Ultraviolet-visible spectroscopy studies confirm the higher optical band gap (Eg) of 4.157 eV for the microwave sintered sample. Microwave sintered sample shows a very high dielectric constant of εr - 4, 445 with a low dielectric loss as tan δ - 0.0961. Microwave sintered sample exhibit a high polarization maximum of 73 μC/mm2 with reduced coer-civity to be 0.293 kV/mm

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IITH Creators:

IITH Creators	ORCiD

Item Type:

Article

Uncontrolled Keywords:

High dielectric constants; High-energy ball milling; Low dielectric loss; Microwave sintering; Optical and electrical properties; Powder X ray diffraction; Sintered materials; Synthesized materials

Subjects:

Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

Team Library

Date Deposited:

17 Dec 2014 11:02

Last Modified:

17 Dec 2014 11:02

URI:

http://raiithold.iith.ac.in/id/eprint/1206