Low-temperature Co-fired NPO-type ceramic composition for high-frequency capacitor applications

Dong Wan Kim; Jeong Ryeol Kim; Seo Yong Cho; Jianjiang Bian; Kug Sun Hong

Low-temperature Co-fired NPO-type ceramic composition for high-frequency capacitor applications

Dong Wan Kim, Jeong Ryeol Kim, Seo Yong Cho, Jianjiang Bian, Kug Sun Hong

Research output: Contribution to journal › Conference article › peer-review

Abstract

Low-loss dielectrics of the temperature specification NPO are prepared from the system BaTi₄O₉ containing Zn-B-O glass. It was found that the addition of small amount of glass to BaTi₄O ₉lowered the sintering temperature of below 950°C, allowing high electrical conductivity metallization with Cu. High frequency multilayer ceramic chip capacitors (MLCCs) were fabricated. The copper electrodes, combined with low fire BaTi₄O₉ give high Qs of up to 100 at GHz frequencies. The degradation mechanisms of dielectric properties in reducing atmosphere have been studied. The investigations of the dielectric properties at low frequency have enabled us to explain the presence of the mobile charge carriers that cause space-charge polarization in low-fired BaTi₄O₉ samples. Reliability of the compositions with Cu electrodes was also investigated using transmission electron microscopy and X-ray diffraction.

Original language	English
Pages (from-to)	385-388
Number of pages	4
Journal	Key Engineering Materials
Volume	247
Publication status	Published - 2003
Externally published	Yes
Event	Advanced Ceramics and Composites - Shanghai, China Duration: 2002 Nov 19 → 2002 Nov 22

Keywords

BaTiO
Co-Fired
Cu Electrodes
NPO

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Low-temperature Co-fired NPO-type ceramic composition for high-frequency capacitor applications",

abstract = "Low-loss dielectrics of the temperature specification NPO are prepared from the system BaTi4O9 containing Zn-B-O glass. It was found that the addition of small amount of glass to BaTi4O 9lowered the sintering temperature of below 950°C, allowing high electrical conductivity metallization with Cu. High frequency multilayer ceramic chip capacitors (MLCCs) were fabricated. The copper electrodes, combined with low fire BaTi4O9 give high Qs of up to 100 at GHz frequencies. The degradation mechanisms of dielectric properties in reducing atmosphere have been studied. The investigations of the dielectric properties at low frequency have enabled us to explain the presence of the mobile charge carriers that cause space-charge polarization in low-fired BaTi4O9 samples. Reliability of the compositions with Cu electrodes was also investigated using transmission electron microscopy and X-ray diffraction.",

keywords = "BaTiO, Co-Fired, Cu Electrodes, NPO",

author = "Kim, {Dong Wan} and Kim, {Jeong Ryeol} and Cho, {Seo Yong} and Jianjiang Bian and Hong, {Kug Sun}",

year = "2003",

language = "English",

volume = "247",

pages = "385--388",

journal = "Key Engineering Materials",

issn = "1013-9826",

publisher = "Trans Tech Publications Ltd",

note = "Advanced Ceramics and Composites ; Conference date: 19-11-2002 Through 22-11-2002",

}

TY - JOUR

T1 - Low-temperature Co-fired NPO-type ceramic composition for high-frequency capacitor applications

AU - Kim, Dong Wan

AU - Kim, Jeong Ryeol

AU - Cho, Seo Yong

AU - Bian, Jianjiang

AU - Hong, Kug Sun

PY - 2003

Y1 - 2003

N2 - Low-loss dielectrics of the temperature specification NPO are prepared from the system BaTi4O9 containing Zn-B-O glass. It was found that the addition of small amount of glass to BaTi4O 9lowered the sintering temperature of below 950°C, allowing high electrical conductivity metallization with Cu. High frequency multilayer ceramic chip capacitors (MLCCs) were fabricated. The copper electrodes, combined with low fire BaTi4O9 give high Qs of up to 100 at GHz frequencies. The degradation mechanisms of dielectric properties in reducing atmosphere have been studied. The investigations of the dielectric properties at low frequency have enabled us to explain the presence of the mobile charge carriers that cause space-charge polarization in low-fired BaTi4O9 samples. Reliability of the compositions with Cu electrodes was also investigated using transmission electron microscopy and X-ray diffraction.

AB - Low-loss dielectrics of the temperature specification NPO are prepared from the system BaTi4O9 containing Zn-B-O glass. It was found that the addition of small amount of glass to BaTi4O 9lowered the sintering temperature of below 950°C, allowing high electrical conductivity metallization with Cu. High frequency multilayer ceramic chip capacitors (MLCCs) were fabricated. The copper electrodes, combined with low fire BaTi4O9 give high Qs of up to 100 at GHz frequencies. The degradation mechanisms of dielectric properties in reducing atmosphere have been studied. The investigations of the dielectric properties at low frequency have enabled us to explain the presence of the mobile charge carriers that cause space-charge polarization in low-fired BaTi4O9 samples. Reliability of the compositions with Cu electrodes was also investigated using transmission electron microscopy and X-ray diffraction.

KW - BaTiO

KW - Co-Fired

KW - Cu Electrodes

KW - NPO

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M3 - Conference article

AN - SCOPUS:0042014040

SN - 1013-9826

VL - 247

SP - 385

EP - 388

JO - Key Engineering Materials

JF - Key Engineering Materials

T2 - Advanced Ceramics and Composites

Y2 - 19 November 2002 through 22 November 2002

ER -

Low-temperature Co-fired NPO-type ceramic composition for high-frequency capacitor applications

Abstract

Keywords

ASJC Scopus subject areas

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