caa a22 4500 445827440 CHVBK 20180317145303.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10854-010-0201-0 doi (NATIONALLICENCE)springer-10.1007/s10854-010-0201-0 Structure and dielectric properties of potassium niobate nano glass-ceramics [Elektronische Daten] [Reenamoni Chaliha, V. Tiwari, P. Gupta, K. Annapurna, Anal Tarafder, Basudeb Karmakar] Glasses in the composition of 25K2O-25Nb2O5-50SiO2 (mol %) have been prepared by melt quenching technique and isothermally heat-treated at 800°C for different duration (0-200h). The formed nanocrystalline KNbO3 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 0.1-1000kHz 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 KNbO3 from paraelectric cubic to ferroelectric tetragonal around 425 and 397°C (Curie temperature) for nano glass-ceramics obtained after 1 and 200h heat-treatment respectively. Springer Science+Business Media, LLC, 2010 Chaliha Reenamoni Glass Science and Technology Section, Central Glass and Ceramic Research Institute, Council of Scientific and Industrial Research, 196, Raja S.C. Mullick Road, 700032, Kolkata, India aut Tiwari V. Laser Materials Development and Devices Division, Raja Ramanna Center for Advanced Technology, 452013, Indore, India aut Gupta P. Laser Materials Development and Devices Division, Raja Ramanna Center for Advanced Technology, 452013, Indore, India aut Annapurna K. Glass Science and Technology Section, Central Glass and Ceramic Research Institute, Council of Scientific and Industrial Research, 196, Raja S.C. Mullick Road, 700032, Kolkata, India aut Tarafder Anal Glass Science and Technology Section, Central Glass and Ceramic Research Institute, Council of Scientific and Industrial Research, 196, Raja S.C. Mullick Road, 700032, Kolkata, India aut Karmakar Basudeb Glass Science and Technology Section, Central Glass and Ceramic Research Institute, Council of Scientific and Industrial Research, 196, Raja S.C. Mullick Road, 700032, Kolkata, India aut Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/7(2011-07-01), 728-734 0957-4522 22:7<728 2011 22 10854 https://doi.org/10.1007/s10854-010-0201-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10854-010-0201-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chaliha Reenamoni Glass Science and Technology Section, Central Glass and Ceramic Research Institute, Council of Scientific and Industrial Research, 196, Raja S.C. Mullick Road, 700032, Kolkata, India aut NATIONALLICENCE 700 1- Tiwari V. Laser Materials Development and Devices Division, Raja Ramanna Center for Advanced Technology, 452013, Indore, India aut NATIONALLICENCE 700 1- Gupta P. Laser Materials Development and Devices Division, Raja Ramanna Center for Advanced Technology, 452013, Indore, India aut NATIONALLICENCE 700 1- Annapurna K. Glass Science and Technology Section, Central Glass and Ceramic Research Institute, Council of Scientific and Industrial Research, 196, Raja S.C. Mullick Road, 700032, Kolkata, India aut NATIONALLICENCE 700 1- Tarafder Anal Glass Science and Technology Section, Central Glass and Ceramic Research Institute, Council of Scientific and Industrial Research, 196, Raja S.C. Mullick Road, 700032, Kolkata, India aut NATIONALLICENCE 700 1- Karmakar Basudeb Glass Science and Technology Section, Central Glass and Ceramic Research Institute, Council of Scientific and Industrial Research, 196, Raja S.C. Mullick Road, 700032, Kolkata, India aut NATIONALLICENCE 773 0- Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/7(2011-07-01), 728-734 0957-4522 22:7<728 2011 22 10854 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer