Glass-free LTCC microwave dielectric ceramics

Jian Jiang Bian; Dong Wan Kim; Kug Sun Hong

doi:10.1016/j.materresbull.2005.07.003

Glass-free LTCC microwave dielectric ceramics

Jian Jiang Bian, Dong Wan Kim, Kug Sun Hong

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

93 Citations (Scopus)

Abstract

The sintering behavior, microstructure and microwave dielectric properties of complex pyrophosphate compounds AMP₂O₇ (A = Ca, Sr; M = Zn, Cu) were investigated in this paper. All compounds could be densified below the temperature of 950 °C without any glass addition, and exhibit low permittivity (ε_r < 8), high Q × f value and negative temperature coefficient of resonant frequency. The Q × f value was discussed from the point of view of bond strength. The chemical compatibility with silver and copper was also investigated. All compounds seriously react with silver at ∼700 °C. However SrZnP₂O₇ could be co-fired with copper in reduced atmosphere. The microwave dielectric properties of SrZnP₂O₇ sintered at 950 °C in reducing atmosphere are: ε_r = 7.06, Q × f = 52781 GHz, τ_f = -70 ppm/°C. In terms of its lower sintering temperature, chemical compatibility with copper and good microwave dielectric properties, SrZnP₂O ₇ ceramic is very promising for low temperature co-fired ceramic (LTCC) applications.

Original language	English
Pages (from-to)	2120-2129
Number of pages	10
Journal	Materials Research Bulletin
Volume	40
Issue number	12
DOIs	https://doi.org/10.1016/j.materresbull.2005.07.003
Publication status	Published - 2005 Dec 8
Externally published	Yes

Keywords

A. Ceramics
D. Dielectric properties

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.materresbull.2005.07.003

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title = "Glass-free LTCC microwave dielectric ceramics",

abstract = "The sintering behavior, microstructure and microwave dielectric properties of complex pyrophosphate compounds AMP2O7 (A = Ca, Sr; M = Zn, Cu) were investigated in this paper. All compounds could be densified below the temperature of 950 °C without any glass addition, and exhibit low permittivity (εr < 8), high Q × f value and negative temperature coefficient of resonant frequency. The Q × f value was discussed from the point of view of bond strength. The chemical compatibility with silver and copper was also investigated. All compounds seriously react with silver at ∼700 °C. However SrZnP2O7 could be co-fired with copper in reduced atmosphere. The microwave dielectric properties of SrZnP2O7 sintered at 950 °C in reducing atmosphere are: εr = 7.06, Q × f = 52781 GHz, τf = -70 ppm/°C. In terms of its lower sintering temperature, chemical compatibility with copper and good microwave dielectric properties, SrZnP2O 7 ceramic is very promising for low temperature co-fired ceramic (LTCC) applications.",

keywords = "A. Ceramics, D. Dielectric properties",

author = "Bian, {Jian Jiang} and Kim, {Dong Wan} and Hong, {Kug Sun}",

year = "2005",

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doi = "10.1016/j.materresbull.2005.07.003",

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volume = "40",

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journal = "Materials Research Bulletin",

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T1 - Glass-free LTCC microwave dielectric ceramics

AU - Bian, Jian Jiang

AU - Kim, Dong Wan

AU - Hong, Kug Sun

PY - 2005/12/8

Y1 - 2005/12/8

N2 - The sintering behavior, microstructure and microwave dielectric properties of complex pyrophosphate compounds AMP2O7 (A = Ca, Sr; M = Zn, Cu) were investigated in this paper. All compounds could be densified below the temperature of 950 °C without any glass addition, and exhibit low permittivity (εr < 8), high Q × f value and negative temperature coefficient of resonant frequency. The Q × f value was discussed from the point of view of bond strength. The chemical compatibility with silver and copper was also investigated. All compounds seriously react with silver at ∼700 °C. However SrZnP2O7 could be co-fired with copper in reduced atmosphere. The microwave dielectric properties of SrZnP2O7 sintered at 950 °C in reducing atmosphere are: εr = 7.06, Q × f = 52781 GHz, τf = -70 ppm/°C. In terms of its lower sintering temperature, chemical compatibility with copper and good microwave dielectric properties, SrZnP2O 7 ceramic is very promising for low temperature co-fired ceramic (LTCC) applications.

AB - The sintering behavior, microstructure and microwave dielectric properties of complex pyrophosphate compounds AMP2O7 (A = Ca, Sr; M = Zn, Cu) were investigated in this paper. All compounds could be densified below the temperature of 950 °C without any glass addition, and exhibit low permittivity (εr < 8), high Q × f value and negative temperature coefficient of resonant frequency. The Q × f value was discussed from the point of view of bond strength. The chemical compatibility with silver and copper was also investigated. All compounds seriously react with silver at ∼700 °C. However SrZnP2O7 could be co-fired with copper in reduced atmosphere. The microwave dielectric properties of SrZnP2O7 sintered at 950 °C in reducing atmosphere are: εr = 7.06, Q × f = 52781 GHz, τf = -70 ppm/°C. In terms of its lower sintering temperature, chemical compatibility with copper and good microwave dielectric properties, SrZnP2O 7 ceramic is very promising for low temperature co-fired ceramic (LTCC) applications.

KW - A. Ceramics

KW - D. Dielectric properties

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JO - Materials Research Bulletin

JF - Materials Research Bulletin

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Glass-free LTCC microwave dielectric ceramics

Abstract

Keywords

ASJC Scopus subject areas

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