Relaxor studies of Na, Fe, and Mg doped SBN ceramics

Author

Murty, Narayana S. ; Murthy, K.V.R. ; Padmavathi, G. ; Bhanumathi, A. ; Murty, Linga K.

Author_Institution

Dept. of Phys., Andhra Univ., Visakhapatnam, India

fYear

1992

fDate

30 Aug-2 Sep 1992

Firstpage

209

Lastpage

212

Abstract

Sodium-doped strontium barium niobate (SBN) ceramics with tetragonal tungsten bronze structure have been prepared by powder metallurgy. The effect of various dopants on the properties of SBN ceramics has been investigated, and relaxor characteristics have been studied. The dielectric loss is very low in all the compositions. Curie temperature increases slightly and the dielectric constant decreases with increasing frequency. The dielectric constant vs. temperature curves indicate a broad maximum, which is characteristic of a diffuse phase transition

Keywords

barium compounds; dielectric losses; dielectric relaxation; ferroelectric Curie temperature; ferroelectric transitions; iron; magnesium; permittivity; powder technology; sodium; strontium compounds; Curie temperature; Sr_xBa_1-xNb₂O₆:Fe; Sr_xBa_1-xNb₂O₆:Mg; Sr_xBa_1-xNb₂O₆:Na; dielectric constant; dielectric loss; diffuse phase transition; dopants; powder metallurgy; relaxor characteristics; temperature curves; Barium; Ceramics; Dielectric constant; Dielectric losses; Iron; Niobium compounds; Powders; Strontium; Temperature; Tungsten;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on

Conference_Location

Greenville, SC

Print_ISBN

0-7803-0465-9

Type

conf

DOI

10.1109/ISAF.1992.300665

Filename

300665