Microstructural features and electrical properties of copper oxide added potassium sodium niobate ceramics

No Thumbnail Available

Date

2010

Journal Title

Journal ISSN

Volume Title

Publisher

ELSEVIER SCI LTD

Access Rights

info:eu-repo/semantics/closedAccess

Research Projects

Organizational Units

Journal Issue

Abstract

In this study, effects of 0.5, 1.0 and 1.5 mole% CuO addition on the properties of potassium sodium niobate (K0.5Na0.5)NbO3-KNN ceramics were investigated. Pure KNN and CuO-added KNN pellet samples were sintered at 1100 and 1090 degrees C for 4 h, respectively. Phase analysis showed that all samples crystallized in pure orthorhombic perovskite phase. Addition of 1.0 and 1.5 mole% CuO caused grain growth, densification and formation of a liquid phase at the grain boundaries. Curie temperature has shifted from 480 to 435 degrees C with increasing CuO ratio. The most remarkable characteristic of the hysteresis loops were the constricted nature of the 0.5 mole% CuO-added KNN's curve and the antiferroelectric-like appearance of the 1.5 mole% CuO-added KNN's curve. Piezeoelectric properties of d(33) = 120 pC/N, k(p) = 0.27 and Q(m) = 772 were obtained from the 1.5 mole% CuO-added KNN. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Description

Keywords

Powders: solid state reaction, Microstructure-final, Ferroelectric properties, (K,Na)NbO3

Journal or Series

CERAMICS INTERNATIONAL

WoS Q Value

Q1

Scopus Q Value

Q1

Volume

36

Issue

6

Citation