Dielectric properties of B2O3-doped (1 - x)LaAlO3-xSrTiO3 ceramic system at microwave frequency

Cheng Liang Huang; Kuo Hau Chiang

doi:10.1016/S0025-5408(02)00871-1

Dielectric properties of B₂O₃-doped (1 - x)LaAlO₃-xSrTiO₃ ceramic system at microwave frequency

Cheng Liang Huang, Kuo Hau Chiang

Department of Electrical Engineering

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

32 Citations (Scopus)

Abstract

The effects of B₂O₃ addition on the microwave dielectric properties and the microstructures of (1-x)LaAlO₃-xSrTiO₃ ceramics prepared by conventional solid-state routes have been investigated. Doping with 0.25wt.% B₂O₃ can effectively promote the densification and the microwave dielectric properties of (1-x)LaAlO₃-xSrTiO₃ ceramics. It is found that LaAlO₃-SrTiO₃ ceramics can be sintered at 1400°C due to the liquid phase effect of a B₂O₃ addition observed by scanning electronic microscopy (SEM). The dielectric constant as well as the Q×f value decreases with increasing B₂O₃ content. At 1460°C, 0.46LaAlO₃-0.54SrTiO₃ ceramics with 0.25wt.% B₂O₃ addition possesses a dielectric constant (_r) of 35, a Q×f value of 38,000 (at 7GHz) and a temperature coefficients of resonant frequency (τ_f) of -1ppm/°C.

Original language	English
Pages (from-to)	1941-1948
Number of pages	8
Journal	Materials Research Bulletin
Volume	37
Issue number	12
DOIs	https://doi.org/10.1016/S0025-5408(02)00871-1
Publication status	Published - 2002 Oct 3

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Dielectric properties of B2O3-doped (1 - x)LaAlO3-xSrTiO3 ceramic system at microwave frequency",

abstract = "The effects of B2O3 addition on the microwave dielectric properties and the microstructures of (1-x)LaAlO3-xSrTiO3 ceramics prepared by conventional solid-state routes have been investigated. Doping with 0.25wt.% B2O3 can effectively promote the densification and the microwave dielectric properties of (1-x)LaAlO3-xSrTiO3 ceramics. It is found that LaAlO3-SrTiO3 ceramics can be sintered at 1400°C due to the liquid phase effect of a B2O3 addition observed by scanning electronic microscopy (SEM). The dielectric constant as well as the Q×f value decreases with increasing B2O3 content. At 1460°C, 0.46LaAlO3-0.54SrTiO3 ceramics with 0.25wt.% B2O3 addition possesses a dielectric constant (r) of 35, a Q×f value of 38,000 (at 7GHz) and a temperature coefficients of resonant frequency (τf) of -1ppm/°C.",

author = "Huang, {Cheng Liang} and Chiang, {Kuo Hau}",

note = "Funding Information: This work was supported by the National Science Council of the Republic of China, under grant NSC90-2216-E-006-058. ",

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T1 - Dielectric properties of B2O3-doped (1 - x)LaAlO3-xSrTiO3 ceramic system at microwave frequency

AU - Huang, Cheng Liang

AU - Chiang, Kuo Hau

N1 - Funding Information: This work was supported by the National Science Council of the Republic of China, under grant NSC90-2216-E-006-058.

PY - 2002/10/3

Y1 - 2002/10/3

N2 - The effects of B2O3 addition on the microwave dielectric properties and the microstructures of (1-x)LaAlO3-xSrTiO3 ceramics prepared by conventional solid-state routes have been investigated. Doping with 0.25wt.% B2O3 can effectively promote the densification and the microwave dielectric properties of (1-x)LaAlO3-xSrTiO3 ceramics. It is found that LaAlO3-SrTiO3 ceramics can be sintered at 1400°C due to the liquid phase effect of a B2O3 addition observed by scanning electronic microscopy (SEM). The dielectric constant as well as the Q×f value decreases with increasing B2O3 content. At 1460°C, 0.46LaAlO3-0.54SrTiO3 ceramics with 0.25wt.% B2O3 addition possesses a dielectric constant (r) of 35, a Q×f value of 38,000 (at 7GHz) and a temperature coefficients of resonant frequency (τf) of -1ppm/°C.

AB - The effects of B2O3 addition on the microwave dielectric properties and the microstructures of (1-x)LaAlO3-xSrTiO3 ceramics prepared by conventional solid-state routes have been investigated. Doping with 0.25wt.% B2O3 can effectively promote the densification and the microwave dielectric properties of (1-x)LaAlO3-xSrTiO3 ceramics. It is found that LaAlO3-SrTiO3 ceramics can be sintered at 1400°C due to the liquid phase effect of a B2O3 addition observed by scanning electronic microscopy (SEM). The dielectric constant as well as the Q×f value decreases with increasing B2O3 content. At 1460°C, 0.46LaAlO3-0.54SrTiO3 ceramics with 0.25wt.% B2O3 addition possesses a dielectric constant (r) of 35, a Q×f value of 38,000 (at 7GHz) and a temperature coefficients of resonant frequency (τf) of -1ppm/°C.

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VL - 37

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JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 12

ER -

Dielectric properties of B₂O₃-doped (1 - x)LaAlO₃-xSrTiO₃ ceramic system at microwave frequency

Abstract

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