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Title: Raman and dielectric study of Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3}-MgAl{sub 2}O{sub 4} tunable microwave composite

Abstract

(1-x)Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3}-xMgAl{sub 2}O{sub 4} (x=0.00, 0.05, 0.10, 0.20, and 0.30) composite ceramics have been synthesized by the solid-state reaction, and its structural and dielectric properties have been systematically characterized. Two crystalline phases, a cubic perovskite structure Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3} (BST) and a face-centered-cubic spinel structure MgAl{sub 2}O{sub 4} (MA), are clearly visible for x{>=}0.05. As the MA content increases, the composite ceramics show an increased degree of deviation from the Curie-Weiss law and an increased diffuseness of the dielectric peak. Meanwhile, the tunability of composite ceramics increases. Raman analysis clearly indicates that the incorporation of MA lowers the permittivity and degrades the quality factor of BST composites, which is ascribed to the deterioration on B-site ordering of ABO{sub 3} perovskite structure.

Authors:
; ; ;  [1]
  1. Functional Materials Research Laboratory, Tongji University, 1239 Siping Road, Shanghai 200092 (China)
Publication Date:
OSTI Identifier:
21185872
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 104; Journal Issue: 8; Other Information: DOI: 10.1063/1.3000057; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINATES; BARIUM COMPOUNDS; CERAMICS; COMPOSITE MATERIALS; CRYSTALS; CURIE-WEISS LAW; DIELECTRIC MATERIALS; FCC LATTICES; GRAIN ORIENTATION; MAGNESIUM COMPOUNDS; MAGNETIC SUSCEPTIBILITY; MICROWAVE RADIATION; PERMITTIVITY; PEROVSKITE; QUALITY FACTOR; RAMAN SPECTRA; SPINELS; STRONTIUM TITANATES

Citation Formats

Jingji, Zhang, Jiwei, Zhai, Haitao, Jiang, and Xi, Yao. Raman and dielectric study of Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3}-MgAl{sub 2}O{sub 4} tunable microwave composite. United States: N. p., 2008. Web. doi:10.1063/1.3000057.
Jingji, Zhang, Jiwei, Zhai, Haitao, Jiang, & Xi, Yao. Raman and dielectric study of Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3}-MgAl{sub 2}O{sub 4} tunable microwave composite. United States. https://doi.org/10.1063/1.3000057
Jingji, Zhang, Jiwei, Zhai, Haitao, Jiang, and Xi, Yao. 2008. "Raman and dielectric study of Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3}-MgAl{sub 2}O{sub 4} tunable microwave composite". United States. https://doi.org/10.1063/1.3000057.
@article{osti_21185872,
title = {Raman and dielectric study of Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3}-MgAl{sub 2}O{sub 4} tunable microwave composite},
author = {Jingji, Zhang and Jiwei, Zhai and Haitao, Jiang and Xi, Yao},
abstractNote = {(1-x)Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3}-xMgAl{sub 2}O{sub 4} (x=0.00, 0.05, 0.10, 0.20, and 0.30) composite ceramics have been synthesized by the solid-state reaction, and its structural and dielectric properties have been systematically characterized. Two crystalline phases, a cubic perovskite structure Ba{sub 0.4}Sr{sub 0.6}TiO{sub 3} (BST) and a face-centered-cubic spinel structure MgAl{sub 2}O{sub 4} (MA), are clearly visible for x{>=}0.05. As the MA content increases, the composite ceramics show an increased degree of deviation from the Curie-Weiss law and an increased diffuseness of the dielectric peak. Meanwhile, the tunability of composite ceramics increases. Raman analysis clearly indicates that the incorporation of MA lowers the permittivity and degrades the quality factor of BST composites, which is ascribed to the deterioration on B-site ordering of ABO{sub 3} perovskite structure.},
doi = {10.1063/1.3000057},
url = {https://www.osti.gov/biblio/21185872}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 8,
volume = 104,
place = {United States},
year = {Wed Oct 15 00:00:00 EDT 2008},
month = {Wed Oct 15 00:00:00 EDT 2008}
}