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Title: Low-loss Ca{sub 5-x}Sr{sub x}A{sub 2}TiO{sub 12} [A=Nb,Ta] ceramics: Microwave dielectric properties and vibrational spectroscopic analysis

Abstract

Complex perovskite-type Ca{sub 5-x}Sr{sub x}A{sub 2}TiO{sub 12} [A=Nb,Ta] (0{<=}x{<=}5) ceramics were prepared by conventional solid-state ceramic route. The crystal structure, microwave dielectric properties, and vibrational spectroscopic characteristics of these materials are reported. The structure and microstructure were investigated by x-ray diffraction and scanning electron microscopy techniques. The microwave dielectric properties were measured in the 3-5-GHz frequency range by the resonance method. Structural evolutions from orthorhombic to an averaged pseudocubic phase, with associated changes in dielectric properties, were observed as a function of composition. The structure-property relationships in these ceramics were established using Raman and Fourier transform infrared spectroscopic techniques. Raman analysis showed characteristic bands of ordered perovskite materials, with variation in both intensity and frequency as a function of composition.

Authors:
; ; ; ;  [1]
  1. Ceramic Technology Division, Regional Research Laboratory, Trivandrum 695 019 (India)
Publication Date:
OSTI Identifier:
20709661
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 97; Journal Issue: 10; Other Information: DOI: 10.1063/1.1897065; (c) 2005 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; CALCIUM COMPOUNDS; CERAMICS; DIELECTRIC MATERIALS; FOURIER TRANSFORM SPECTROMETERS; GHZ RANGE 01-100; INFRARED SPECTRA; MICROSTRUCTURE; MICROWAVE RADIATION; NIOBIUM COMPOUNDS; PERMITTIVITY; PEROVSKITE; PHASE TRANSFORMATIONS; RAMAN SPECTRA; SCANNING ELECTRON MICROSCOPY; STRONTIUM COMPOUNDS; TANTALUM COMPOUNDS; TITANATES; X-RAY DIFFRACTION

Citation Formats

Bijumon, Pazhoor Varghese, Sebastian, Mailadil Thomas, Dias, Anderson, Moreira, Roberto Luiz, Mohanan, Pezholil, Departamento de Engenharia Metalurgica e de Materiais, Universidade Federal de Minas Gerais, Departamento de Fisica, Instituto de Ciencias Exatas, and Department of Electronics, Cochin University of Science and Technology, Kochi-682 022. Low-loss Ca{sub 5-x}Sr{sub x}A{sub 2}TiO{sub 12} [A=Nb,Ta] ceramics: Microwave dielectric properties and vibrational spectroscopic analysis. United States: N. p., 2005. Web. doi:10.1063/1.1897065.
Bijumon, Pazhoor Varghese, Sebastian, Mailadil Thomas, Dias, Anderson, Moreira, Roberto Luiz, Mohanan, Pezholil, Departamento de Engenharia Metalurgica e de Materiais, Universidade Federal de Minas Gerais, Departamento de Fisica, Instituto de Ciencias Exatas, & Department of Electronics, Cochin University of Science and Technology, Kochi-682 022. Low-loss Ca{sub 5-x}Sr{sub x}A{sub 2}TiO{sub 12} [A=Nb,Ta] ceramics: Microwave dielectric properties and vibrational spectroscopic analysis. United States. https://doi.org/10.1063/1.1897065
Bijumon, Pazhoor Varghese, Sebastian, Mailadil Thomas, Dias, Anderson, Moreira, Roberto Luiz, Mohanan, Pezholil, Departamento de Engenharia Metalurgica e de Materiais, Universidade Federal de Minas Gerais, Departamento de Fisica, Instituto de Ciencias Exatas, and Department of Electronics, Cochin University of Science and Technology, Kochi-682 022. 2005. "Low-loss Ca{sub 5-x}Sr{sub x}A{sub 2}TiO{sub 12} [A=Nb,Ta] ceramics: Microwave dielectric properties and vibrational spectroscopic analysis". United States. https://doi.org/10.1063/1.1897065.
@article{osti_20709661,
title = {Low-loss Ca{sub 5-x}Sr{sub x}A{sub 2}TiO{sub 12} [A=Nb,Ta] ceramics: Microwave dielectric properties and vibrational spectroscopic analysis},
author = {Bijumon, Pazhoor Varghese and Sebastian, Mailadil Thomas and Dias, Anderson and Moreira, Roberto Luiz and Mohanan, Pezholil and Departamento de Engenharia Metalurgica e de Materiais, Universidade Federal de Minas Gerais and Departamento de Fisica, Instituto de Ciencias Exatas and Department of Electronics, Cochin University of Science and Technology, Kochi-682 022},
abstractNote = {Complex perovskite-type Ca{sub 5-x}Sr{sub x}A{sub 2}TiO{sub 12} [A=Nb,Ta] (0{<=}x{<=}5) ceramics were prepared by conventional solid-state ceramic route. The crystal structure, microwave dielectric properties, and vibrational spectroscopic characteristics of these materials are reported. The structure and microstructure were investigated by x-ray diffraction and scanning electron microscopy techniques. The microwave dielectric properties were measured in the 3-5-GHz frequency range by the resonance method. Structural evolutions from orthorhombic to an averaged pseudocubic phase, with associated changes in dielectric properties, were observed as a function of composition. The structure-property relationships in these ceramics were established using Raman and Fourier transform infrared spectroscopic techniques. Raman analysis showed characteristic bands of ordered perovskite materials, with variation in both intensity and frequency as a function of composition.},
doi = {10.1063/1.1897065},
url = {https://www.osti.gov/biblio/20709661}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 10,
volume = 97,
place = {United States},
year = {Sun May 15 00:00:00 EDT 2005},
month = {Sun May 15 00:00:00 EDT 2005}
}