K2Sr4Nb10O30-based dielectric ceramics having the tetragonal tungsten bronze structure and temperature-stable high permittivity

K2Sr4Nb10O30-based (KSN) dielectric ceramics, having the tetragonal tungsten bronze structure (TTB), and displaying a high dielectric constant and flat epsilon'r = f(T) curves meeting the X7R specification, were studied. The series K2Sr4(MgxNb10-x)O30-(3/2)x exhibits these properties, as well a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the European Ceramic Society 1999-01, Vol.19 (6-7), p.1105-1109
Main Authors: TRIBOTTE, B, HAUSSONNE, J. M, DESGARDIN, G
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Electrotechnical and electronic ceramics
Exact sciences and technology
Technical ceramics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:K2Sr4Nb10O30-based (KSN) dielectric ceramics, having the tetragonal tungsten bronze structure (TTB), and displaying a high dielectric constant and flat epsilon'r = f(T) curves meeting the X7R specification, were studied. The series K2Sr4(MgxNb10-x)O30-(3/2)x exhibits these properties, as well as K2Sr4Nb9.78O29.45 and K2(Sr3.25Pb0.75)Nb9.78O29.45 when sintered with MgO or ZrO2. Both X-ray and electron diffraction reveal the former composition to be a single phase material with the TTB structure. In this material, the presence of disorder, resulting from a large variation in the local K/Sr ratio and the presence of Zr on the octahedral Nb sites, is primarily responsible for the X7R epsilon'r = f(T) curve with epsilon'r,25 C = 5000. 7 refs.
ISSN:0955-2219
1873-619X
DOI:10.1016/s0955-2219(98)00383-5