Microstructure and microwave dielectric properties of (1-x)NdGaO 3-xCaTiO3 ceramics

Min Han Kim; Myung Jae Yoo; Sahn Nahm; Chang Hack Choi; Hwack Joo Lee; Hyun Min Park; Jae Cheon Kim; Myong Ho Kim

doi:10.1080/713716280

Microstructure and microwave dielectric properties of (1-x)NdGaO _3-xCaTiO₃ ceramics

Min Han Kim, Myung Jae Yoo, Sahn Nahm, Chang Hack Choi, Hwack Joo Lee, Hyun Min Park, Jae Cheon Kim, Myong Ho Kim

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Microstructure and microwave dielectric properties of (1-x)NdGaO 3 -xCaTiO 3 ceramics have been investigated. For specimens with x ≤ 0.5, a Nd 3 Ga 5 O 12 phase was observed. A liquid phase was found in the specimens with x≥0.5, containing a high concentration of Ca and Ga ions. The dielectric constant ( ε_r ) and the temperature coefficient of the resonant frequency ( τ f ) of the specimens increased with an increase of x. The Q×f value of the NdGaO 3 ceramics was about 85,000 GHz, and decreased inversely with x. Excellent microwave dielectric properties of Q×f=46,000 GHz, ε_r =45 and τ_f =-2 ppm/C were obtained for 0.35NdGaO 3 -0.65CaTiO 3 ceramics.

Original language	English
Pages (from-to)	303-308
Number of pages	6
Journal	Ferroelectrics
Volume	272
DOIs	https://doi.org/10.1080/713716280
Publication status	Published - 2002 Jan 1

Keywords

CaTiO
Microwave dielectric properties
NdGaO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1080/713716280

Cite this

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title = "Microstructure and microwave dielectric properties of (1-x)NdGaO 3-xCaTiO3 ceramics",

abstract = "Microstructure and microwave dielectric properties of (1-x)NdGaO 3 -xCaTiO 3 ceramics have been investigated. For specimens with x ≤ 0.5, a Nd 3 Ga 5 O 12 phase was observed. A liquid phase was found in the specimens with x≥0.5, containing a high concentration of Ca and Ga ions. The dielectric constant ( εr ) and the temperature coefficient of the resonant frequency ( τ f ) of the specimens increased with an increase of x. The Q×f value of the NdGaO 3 ceramics was about 85,000 GHz, and decreased inversely with x. Excellent microwave dielectric properties of Q×f=46,000 GHz, εr =45 and τf =-2 ppm/C were obtained for 0.35NdGaO 3 -0.65CaTiO 3 ceramics.",

keywords = "CaTiO, Microwave dielectric properties, NdGaO",

author = "Kim, {Min Han} and Yoo, {Myung Jae} and Sahn Nahm and Choi, {Chang Hack} and Lee, {Hwack Joo} and Park, {Hyun Min} and Kim, {Jae Cheon} and Kim, {Myong Ho}",

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T1 - Microstructure and microwave dielectric properties of (1-x)NdGaO 3-xCaTiO3 ceramics

AU - Kim, Min Han

AU - Yoo, Myung Jae

AU - Nahm, Sahn

AU - Choi, Chang Hack

AU - Lee, Hwack Joo

AU - Park, Hyun Min

AU - Kim, Jae Cheon

AU - Kim, Myong Ho

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Microstructure and microwave dielectric properties of (1-x)NdGaO 3 -xCaTiO 3 ceramics have been investigated. For specimens with x ≤ 0.5, a Nd 3 Ga 5 O 12 phase was observed. A liquid phase was found in the specimens with x≥0.5, containing a high concentration of Ca and Ga ions. The dielectric constant ( εr ) and the temperature coefficient of the resonant frequency ( τ f ) of the specimens increased with an increase of x. The Q×f value of the NdGaO 3 ceramics was about 85,000 GHz, and decreased inversely with x. Excellent microwave dielectric properties of Q×f=46,000 GHz, εr =45 and τf =-2 ppm/C were obtained for 0.35NdGaO 3 -0.65CaTiO 3 ceramics.

AB - Microstructure and microwave dielectric properties of (1-x)NdGaO 3 -xCaTiO 3 ceramics have been investigated. For specimens with x ≤ 0.5, a Nd 3 Ga 5 O 12 phase was observed. A liquid phase was found in the specimens with x≥0.5, containing a high concentration of Ca and Ga ions. The dielectric constant ( εr ) and the temperature coefficient of the resonant frequency ( τ f ) of the specimens increased with an increase of x. The Q×f value of the NdGaO 3 ceramics was about 85,000 GHz, and decreased inversely with x. Excellent microwave dielectric properties of Q×f=46,000 GHz, εr =45 and τf =-2 ppm/C were obtained for 0.35NdGaO 3 -0.65CaTiO 3 ceramics.

KW - CaTiO

KW - Microwave dielectric properties

KW - NdGaO

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