Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics

In this work, Li-modified KNN ceramic compositions ((K0.5Na 0.5)1-xLix)NbO3 with x = 0.03, 0.04, 0.05, 0.06, 0.65 and 0.07 were prepared by a conventional solid-state mixed-oxide method. The structural phase formation and microstructure were characterized by X-ray diffraction technique (XRD) and sca...

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Main Authors: Wongsaenmai S., Ananta S., Yimnirun R.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-82155167684&partnerID=40&md5=467484c913e87045ca3c7dc86ca0c3ee
http://cmuir.cmu.ac.th/handle/6653943832/5977
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spelling th-cmuir.6653943832-59772014-08-30T03:23:41Z Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics Wongsaenmai S. Ananta S. Yimnirun R. In this work, Li-modified KNN ceramic compositions ((K0.5Na 0.5)1-xLix)NbO3 with x = 0.03, 0.04, 0.05, 0.06, 0.65 and 0.07 were prepared by a conventional solid-state mixed-oxide method. The structural phase formation and microstructure were characterized by X-ray diffraction technique (XRD) and scanning electron microscopy (SEM). It has been found that a morphotropic phase boundary (MPB) between orthorhombic phase and tetragonal phases should exist between compositions with Li contents of 6-6.5%. The Curie temperature (Tc) of the ceramics shifted to higher temperature with increasing Li content. The room temperature dielectric constant was also seen to be higher than the pure KNN ceramics. In addition, the ferroelectric properties were found to enhance at near MPB compositions. This study clearly showed that the addition of Li could improve the dielectric and ferroelectric properties in (K0.5Na 0.5)NbO3 ceramics. © 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved. 2014-08-30T03:23:41Z 2014-08-30T03:23:41Z 2012 Article 2728842 10.1016/j.ceramint.2011.06.049 CINND http://www.scopus.com/inward/record.url?eid=2-s2.0-82155167684&partnerID=40&md5=467484c913e87045ca3c7dc86ca0c3ee http://cmuir.cmu.ac.th/handle/6653943832/5977 English
institution Chiang Mai University
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description In this work, Li-modified KNN ceramic compositions ((K0.5Na 0.5)1-xLix)NbO3 with x = 0.03, 0.04, 0.05, 0.06, 0.65 and 0.07 were prepared by a conventional solid-state mixed-oxide method. The structural phase formation and microstructure were characterized by X-ray diffraction technique (XRD) and scanning electron microscopy (SEM). It has been found that a morphotropic phase boundary (MPB) between orthorhombic phase and tetragonal phases should exist between compositions with Li contents of 6-6.5%. The Curie temperature (Tc) of the ceramics shifted to higher temperature with increasing Li content. The room temperature dielectric constant was also seen to be higher than the pure KNN ceramics. In addition, the ferroelectric properties were found to enhance at near MPB compositions. This study clearly showed that the addition of Li could improve the dielectric and ferroelectric properties in (K0.5Na 0.5)NbO3 ceramics. © 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
format Article
author Wongsaenmai S.
Ananta S.
Yimnirun R.
spellingShingle Wongsaenmai S.
Ananta S.
Yimnirun R.
Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics
author_facet Wongsaenmai S.
Ananta S.
Yimnirun R.
author_sort Wongsaenmai S.
title Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics
title_short Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics
title_full Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics
title_fullStr Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics
title_full_unstemmed Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics
title_sort effect of li addition on phase formation behavior and electrical properties of (k0.5na0.5)nbo3 lead free ceramics
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-82155167684&partnerID=40&md5=467484c913e87045ca3c7dc86ca0c3ee
http://cmuir.cmu.ac.th/handle/6653943832/5977
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