Modelling and simulation of KNbO3 ceramics dispersion

Author

Al-Refaie, S.N. ; Elayyan, H.S.B.

Author_Institution

Al-Hijjawi Fac. for Eng. Technol., Yarmouk Univ., Irbid

Volume

1

Issue

3

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

133

Lastpage

137

Abstract

The dispersion of potassium niobate (KNbO₃) ceramics is analysed using the multiple-arc approach. This has revealed a high frequency arc that is unattainable by the Cole-Cole single arc analysis. The temperature dependence of the new arc is derived through the spread parameter of the relaxation distribution and interpreted in terms of the ferroelectric property of the KNbO₃ ceramics. It is shown that the overall dispersion behaviour of the ceramics is mainly due to the existence of two distinctly different polarisation mechanisms. The arc approach has also provided an effective tool for network simulation of dispersion whereby the ceramics are modelled by nine parallel R-C branches over the frequency range 10²-10⁵ Hz used

Keywords

ceramics; dielectric materials; dielectric polarisation; dielectric relaxation; potassium compounds; 1 to 1000 kHz; Cole-Cole single arc analysis; KNbO₃; ceramics dispersion; dispersion behaviour; ferroelectric property; high frequency arc; multiple-arc approach; polarisation mechanisms; potassium niobate ceramics; relaxation distribution;

fLanguage

English

Journal_Title

Science, Measurement & Technology, IET

Publisher

iet

ISSN

1751-8822

Type

jour

DOI

10.1049/iet-smt:20060079

Filename

4152465