Electrical characterization of lead free Na 0.5K 0.5NbO3 piezoelectric ceramic / PVA polymer composites

Beena P

Ceramics, Composites, XRD, SEM.

Researchers had always focused on materials exhibiting high dielectric properties concerned with storage and dissipation of energy, ferroelectric ceramics which exhibit interesting electrical properties and flexible polymers which will not destroy the behaviour of the ceramics. Sodium potassium niobate (Na0.5K0.5 NbO3 or NKN) ceramic was chosen as ceramic and poly vinyl alcohol (PVA) as host polymer matrix in this chapter. NKN was prepared through conventional solid state reaction and PVA/NKN composite films were prepared by solution casting method by changing the blend ratio of PVA and NKN. The prepared samples in the form of films were characterized by powder X-ray diffraction. The SEM studies of composite films reveals that the well dispersion of ceramic crystallites in polymer matrix and the porosity was almost negligible. The frequency dependent dielectric properties of PVA/NKN composites were investigated in the frequency range (100Hz - 5MHz). At room temperature, conductivity and relaxation behaviour of the composites were studied. The contributions of bulk and grain boundaries were confirmed by complex impedance spectroscopy. The complex electric modulus was studied and observed dielectric relaxation behaviour reveals localized hopping of oxygen vacancies.

Published Paper   E-Certificate

"Electrical characterization of lead free Na 0.5K 0.5NbO3 piezoelectric ceramic / PVA polymer composites", IJSDR - International Journal of Scientific Development and Research (www.IJSDR.org), ISSN:2455-2631, Vol.1, Issue 1, page no.53 - 62, January-2016, Available :https://ijsdr.org/papers/IJSDR1601011.pdf

Volume 1 Issue 1, January-2016

Pages : 53 - 62

Paper Reg. ID: IJSDR_212371

Published Paper Id: IJSDR1601011

Downloads: 000347053

Research Area: Electrical Engineering 

Country: --, --, India

Published Paper PDF: https://ijsdr.org/papers/IJSDR1601011

Published Paper URL: https://ijsdr.org/viewpaperforall?paper=IJSDR1601011

DOI: https://doi.org/10.5281/zenodo.13359346

ISSN: 2455-2631 | IMPACT FACTOR: 9.15 Calculated By Google Scholar | ESTD YEAR: 2016

An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 9.15 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator

Publisher: IJSDR(IJ Publication) Janvi Wave

This work is licensed under a Creative Commons Attribution 4.0 International License and The Open Definition