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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Preparation and Properties of Non-Stoichiometry (K0.5Na0.5)1+xNbO3 Lead-Free Piezoelectric Ceramics
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 468-470)
Author(s): Yuan-yu Wang, School of Materials Science and Metallurgy Engineering; Guizhou University; Guizhou 550003; China
Cui-cui Liang, School of Materials Science and Metallurgy Engineering; Guizhou University; Guizhou 550003; China
Abstract: Non-stoichiometry (K0.5Na0.5)1+xNbO3 lead-free piezoelectric ceramics were prepared by ordinary sintering. The effect K and Na non-stoichiometry on the microstructure and electrical properties of KNN ceramics was investigated. A single solid solution with orthorhombic structure was observed for all ceramics by XRD patterns. The electrical properties strongly depend on the amount of K and Na. The KNN ceramics exhibit higher density, larger dielectric constant, lower dielectric loss and better piezoelectric constant with the increase of the amount of K and Na. As a result, this study in present work helps improve the density of KNN-based ceramics.
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