Effects of additives on dielectric properties of Y2Ti2O7 ceramics

Jia Yu Ding; Yuan Xiao; Zhe Fei Wang; Li Xi Wang; Qi Tu Zhang

doi:10.3724/SP.J.1077.2010.10563

Effects of additives on dielectric properties of Y₂Ti₂O₇ ceramics

Jia Yu Ding, Yuan Xiao, Zhe Fei Wang, Li Xi Wang, Qi Tu Zhang

College of Materials Science and Engineering

Nanjing Tech University

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

7 Scopus citations

Abstract

The effects of CrO₃, Nb₂O₅, SiO₂ and Al₂O₃ on the sintering characteristics, phase composition and microwave dielectric properties of Y₂Ti₂O₇ ceramics were investigated. It was found that Nb₂O₅ can lower the sintering temperature, increase the permittivity and quality factor of Y₂Ti₂O₇ ceramics, and cause great change of the temperature coefficient of resonant frequency. With the increase of Nb₂O₅ content, it illustrated that all the samples exhibited cubic pyrochlore-type Y₂Ti₂O₇ as main crystalline phase, and Nb⁵⁺ might be considered to partially substitute for Ti⁴⁺. The experimental results showed that 1 mol% Nb₂O₅ doped ceramics sintered at 1420°C exhibited optimum microwave dielectric properties: ε_r=61.8, Q × f=9096 GHz (f=5.494 GHz) and τ_f=54 × 10^-2/°C.

Original language	English
Pages (from-to)	327-331
Number of pages	5
Journal	Wuji Cailiao Xuebao/Journal of Inorganic Materials
Volume	26
Issue number	3
DOIs	https://doi.org/10.3724/SP.J.1077.2010.10563
State	Published - Mar 2011

Keywords

Ceramics
Crystal growth
Dielectric properties
Modification
X-ray diffraction

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@article{721bdc08b8394859b1005a4400c5f8a4,

title = "Effects of additives on dielectric properties of Y2Ti2O7 ceramics",

abstract = "The effects of CrO3, Nb2O5, SiO2 and Al2O3 on the sintering characteristics, phase composition and microwave dielectric properties of Y2Ti2O7 ceramics were investigated. It was found that Nb2O5 can lower the sintering temperature, increase the permittivity and quality factor of Y2Ti2O7 ceramics, and cause great change of the temperature coefficient of resonant frequency. With the increase of Nb2O5 content, it illustrated that all the samples exhibited cubic pyrochlore-type Y2Ti2O7 as main crystalline phase, and Nb5+ might be considered to partially substitute for Ti4+. The experimental results showed that 1 mol% Nb2O5 doped ceramics sintered at 1420°C exhibited optimum microwave dielectric properties: εr=61.8, Q × f=9096 GHz (f=5.494 GHz) and τf=54 × 10-2/°C.",

keywords = "Ceramics, Crystal growth, Dielectric properties, Modification, X-ray diffraction",

author = "Ding, {Jia Yu} and Yuan Xiao and Wang, {Zhe Fei} and Wang, {Li Xi} and Zhang, {Qi Tu}",

year = "2011",

month = mar,

doi = "10.3724/SP.J.1077.2010.10563",

language = "英语",

volume = "26",

pages = "327--331",

journal = "Wuji Cailiao Xuebao/Journal of Inorganic Materials",

issn = "1000-324X",

publisher = "Science China Press",

number = "3",

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T1 - Effects of additives on dielectric properties of Y2Ti2O7 ceramics

AU - Ding, Jia Yu

AU - Xiao, Yuan

AU - Wang, Zhe Fei

AU - Wang, Li Xi

AU - Zhang, Qi Tu

PY - 2011/3

Y1 - 2011/3

N2 - The effects of CrO3, Nb2O5, SiO2 and Al2O3 on the sintering characteristics, phase composition and microwave dielectric properties of Y2Ti2O7 ceramics were investigated. It was found that Nb2O5 can lower the sintering temperature, increase the permittivity and quality factor of Y2Ti2O7 ceramics, and cause great change of the temperature coefficient of resonant frequency. With the increase of Nb2O5 content, it illustrated that all the samples exhibited cubic pyrochlore-type Y2Ti2O7 as main crystalline phase, and Nb5+ might be considered to partially substitute for Ti4+. The experimental results showed that 1 mol% Nb2O5 doped ceramics sintered at 1420°C exhibited optimum microwave dielectric properties: εr=61.8, Q × f=9096 GHz (f=5.494 GHz) and τf=54 × 10-2/°C.

AB - The effects of CrO3, Nb2O5, SiO2 and Al2O3 on the sintering characteristics, phase composition and microwave dielectric properties of Y2Ti2O7 ceramics were investigated. It was found that Nb2O5 can lower the sintering temperature, increase the permittivity and quality factor of Y2Ti2O7 ceramics, and cause great change of the temperature coefficient of resonant frequency. With the increase of Nb2O5 content, it illustrated that all the samples exhibited cubic pyrochlore-type Y2Ti2O7 as main crystalline phase, and Nb5+ might be considered to partially substitute for Ti4+. The experimental results showed that 1 mol% Nb2O5 doped ceramics sintered at 1420°C exhibited optimum microwave dielectric properties: εr=61.8, Q × f=9096 GHz (f=5.494 GHz) and τf=54 × 10-2/°C.

KW - Ceramics

KW - Crystal growth

KW - Dielectric properties

KW - Modification

KW - X-ray diffraction

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DO - 10.3724/SP.J.1077.2010.10563

M3 - 文章

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JO - Wuji Cailiao Xuebao/Journal of Inorganic Materials

JF - Wuji Cailiao Xuebao/Journal of Inorganic Materials

IS - 3

ER -

Effects of additives on dielectric properties of Y₂Ti₂O₇ ceramics

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