Please use this identifier to cite or link to this item:
Publisher DOI: 10.1016/j.jeurceramsoc.2009.05.021
Title: Investigation of the dielectric and piezoelectric properties of potassiumsodium niobate ceramics close to the phase boundary at (K0.35Na0.65)NbO3 and partial substitutions with lithium and antimony
Language: English
Authors: Mgbemere, Henry Ekene 
Herber, Ralf-Peter 
Schneider, Gerold A. 
Keywords: KNN-keramik, keramikherstellung, piezokeramik;KNN ceramics, ceramic processing, piezoelectrics
Issue Date: 2009
Source: Journal of the European Ceramic Society 29 (2009) 3273–3278
Abstract (english): Potassium sodium niobate (KNN) piezoelectric ceramics and KNN substituted with lithium (Li+) and antimony (Sb5+) have been synthesized by the conventional solid state sintering method. This work focuses on the phase transition in the KNN system at potassium (K+) content of approximately 0.35. Therefore, K amount was altered from 0.31 to 0.35. Additionally, Li+ and Sb5+ were used for partial substitution (up to 8% for Sb) thereby enhancing the piezoelectric and dielectric properties. However, addition of Li+ and Sb5+ also lead to a decrease in both the Curie temperature (TC) and the first order phase transition temperature (TT-O) of the ceramics. Addition of more than 4 mol% of Li+ led to the formation of extra phases. The piezoelectric properties within the given composition range were found to be optimum at (K0.34Na0.64Li0.02)(Nb0.96Sb0.04)O3. A piezoelectric charge coefficient (d33) of 404 pm/V for this composition was obtained from unipolar strain hysteresis measurements.
DOI: 10.15480/882.744
Institute: Keramische Hochleistungswerkstoffe M-9 
Type: ResearchPaper
Appears in Collections:Publications (tub.dok)

Files in This Item:
File Description SizeFormat
KNN_LS.pdf354,97 kBAdobe PDFThumbnail
Show full item record

Page view(s)

Last Week
Last month
checked on May 25, 2019


checked on May 25, 2019

Google ScholarTM



Items in TORE are protected by copyright, with all rights reserved, unless otherwise indicated.