NDLI: Structure and dielectric properties of potassium niobate nano glass

Content Provider	Springer Nature Link
Author	Chaliha, Reenamoni Saikia Tiwari, V. S. Gupta, P. K. Annapurna, K. Tarafder, Anal Karmakar, Basudeb
Copyright Year	2010
Abstract	Glasses in the composition of 25K$_{2}$O-25Nb$_{2}$O$_{5}$-50SiO$_{2}$ (mol %) have been prepared by melt quenching technique and isothermally heat-treated at 800 °C for different duration (0–200 h). The formed nanocrystalline KNbO$_{3}$ phase, crystallite size and morphology are examined by X-ray diffraction, Fourier transform infrared reflection spectroscopy, field emission scanning and transmission electron microscopes. The frequency and temperature dependent dielectric constant and loss tangent are measured in the frequency and temperature ranges 0.1–1000 kHz and 200–500 °C respectively. The dielectric constant and loss tangent are found to decrease with increasing frequency and increase with increasing temperature. The dielectric constant and loss tangent versus temperature curve at different frequency revealed the phase transition of KNbO$_{3}$ from paraelectric cubic to ferroelectric tetragonal around 425 and 397 °C (Curie temperature) for nano glass–ceramics obtained after 1 and 200 h heat-treatment respectively.
Starting Page	728
Ending Page	734
Page Count	7
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	22
Issue Number	7
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2010-08-31
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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