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Title: Crystal structure and dielectric properties of xCa(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–(1 − x)(Ca{sub 0.61}Nd{sub 0.26})TiO{sub 3} at the microwave frequency

Abstract

Highlights: • The 0.6Ca(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–0.4Ca{sub 0.61}Nd{sub 0.26}TiO{sub 3} system is thus proposed for use in microwave devices. • The XRD patterns indicate that the xCMN–(1 − x)CNT ceramic system had a complex perovskite structure. • The τ{sub f} value could be adjusted to near zero. - Abstract: The microwave dielectric properties of the xCa(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–(1 − x)Ca{sub 0.61}Nd{sub 0.26}TiO{sub 3} ceramic system (x = 0.2, 0.4, 0.6, and 0.8) were investigated. The crystal structures and the microstructures of the ceramics were characterized using X-ray diffraction and scanning electron microscopy analyses, respectively. A near-zero temperature coefficient of resonant frequency was achieved by adjusting the x value of the system. When the x value was increased from 0.2 to 0.8, the dielectric constant ϵ{sub r} decreased from 83 to 34, the quality factor value (Q × f) increased from 13,000 to 45,000 GHz, and the temperature coefficient of resonant frequency (τ{sub r}) decreased from 85 to −21 ppm/°C. The 0.6Ca(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–0.4Ca{sub 0.61}Nd{sub 0.26}TiO{sub 3} ceramic system is suitable for microwave dielectric resonator applications, as it has an ϵ{sub r} value of ∼47, a Q × f value of ∼37,000 GHz, and a τ{sub r} value ofmore » ∼5 ppm/°C.« less

Authors:
; ; ;
Publication Date:
OSTI Identifier:
22420820
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 63; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM COMPOUNDS; CERAMICS; CRYSTAL STRUCTURE; DIELECTRIC MATERIALS; GHZ RANGE; MAGNESIUM OXIDES; MICROSTRUCTURE; MICROWAVE RADIATION; NEODYMIUM COMPOUNDS; NIOBIUM OXIDES; PERMITTIVITY; RESONATORS; SCANNING ELECTRON MICROSCOPY; TEMPERATURE COEFFICIENT; TITANATES; X-RAY DIFFRACTION

Citation Formats

Huang, Cheng-Liang, Chien, Yu-Hua, E-mail: nov13chien@gmail.com, Shih, Chuan-Feng, and Chang, Hsien-Yuan. Crystal structure and dielectric properties of xCa(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–(1 − x)(Ca{sub 0.61}Nd{sub 0.26})TiO{sub 3} at the microwave frequency. United States: N. p., 2015. Web. doi:10.1016/J.MATERRESBULL.2014.11.038.
Huang, Cheng-Liang, Chien, Yu-Hua, E-mail: nov13chien@gmail.com, Shih, Chuan-Feng, & Chang, Hsien-Yuan. Crystal structure and dielectric properties of xCa(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–(1 − x)(Ca{sub 0.61}Nd{sub 0.26})TiO{sub 3} at the microwave frequency. United States. doi:10.1016/J.MATERRESBULL.2014.11.038.
Huang, Cheng-Liang, Chien, Yu-Hua, E-mail: nov13chien@gmail.com, Shih, Chuan-Feng, and Chang, Hsien-Yuan. Sun . "Crystal structure and dielectric properties of xCa(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–(1 − x)(Ca{sub 0.61}Nd{sub 0.26})TiO{sub 3} at the microwave frequency". United States. doi:10.1016/J.MATERRESBULL.2014.11.038.
@article{osti_22420820,
title = {Crystal structure and dielectric properties of xCa(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–(1 − x)(Ca{sub 0.61}Nd{sub 0.26})TiO{sub 3} at the microwave frequency},
author = {Huang, Cheng-Liang and Chien, Yu-Hua, E-mail: nov13chien@gmail.com and Shih, Chuan-Feng and Chang, Hsien-Yuan},
abstractNote = {Highlights: • The 0.6Ca(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–0.4Ca{sub 0.61}Nd{sub 0.26}TiO{sub 3} system is thus proposed for use in microwave devices. • The XRD patterns indicate that the xCMN–(1 − x)CNT ceramic system had a complex perovskite structure. • The τ{sub f} value could be adjusted to near zero. - Abstract: The microwave dielectric properties of the xCa(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–(1 − x)Ca{sub 0.61}Nd{sub 0.26}TiO{sub 3} ceramic system (x = 0.2, 0.4, 0.6, and 0.8) were investigated. The crystal structures and the microstructures of the ceramics were characterized using X-ray diffraction and scanning electron microscopy analyses, respectively. A near-zero temperature coefficient of resonant frequency was achieved by adjusting the x value of the system. When the x value was increased from 0.2 to 0.8, the dielectric constant ϵ{sub r} decreased from 83 to 34, the quality factor value (Q × f) increased from 13,000 to 45,000 GHz, and the temperature coefficient of resonant frequency (τ{sub r}) decreased from 85 to −21 ppm/°C. The 0.6Ca(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}–0.4Ca{sub 0.61}Nd{sub 0.26}TiO{sub 3} ceramic system is suitable for microwave dielectric resonator applications, as it has an ϵ{sub r} value of ∼47, a Q × f value of ∼37,000 GHz, and a τ{sub r} value of ∼5 ppm/°C.},
doi = {10.1016/J.MATERRESBULL.2014.11.038},
journal = {Materials Research Bulletin},
number = ,
volume = 63,
place = {United States},
year = {Sun Mar 15 00:00:00 EDT 2015},
month = {Sun Mar 15 00:00:00 EDT 2015}
}