Structural and electrical properties of BaTi4O9microwave ceramics incorporated with glass phase

S. G. Lu; Kin Wing Kwok; H. L.W. Chan; C. L. Choy

doi:10.1016/S0921-5107(02)00506-8

Structural and electrical properties of BaTi₄O₉microwave ceramics incorporated with glass phase

S. G. Lu, Kin Wing Kwok, H. L.W. Chan, C. L. Choy

Research output: Journal article publication › Conference article › Academic research › peer-review

50 Citations (Scopus)

Abstract

BaTi4O9(BT4) microwave ceramics incorporated with ZnO-B2O3glass phase were fabricated by a conventional mixed oxide reaction method. A density of 4400 kg m-3was gotten for ceramic sintered at 1200 °C for 2 h, very close to the theoretical density of 4533 kg m-3of pure BaTi4O9. Shifting of the vibration modes in FTIR and Raman spectra was observed for the ceramics sintered at a higher temperature. Partial melting was also observed in these ceramics. The relative permittivity of the ceramics changed between 45 and 50 as the sintering temperature increased from 1200 to 1400 °C. These results indicated that by the incorporation of the glass phase, the sintering temperature of BaTi4O9ceramics could be reduced to 1200 °C while the dielectric ceramics had larger relative permittivities.

Original language	English
Pages (from-to)	491-494
Number of pages	4
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	99
Issue number	1-3
DOIs	https://doi.org/10.1016/S0921-5107(02)00506-8
Publication status	Published - 25 May 2003
Event	Advanced Electronic-ceramic Materials. Proceedings of the 8th IUMRS-ICEM 2002 - Xi'an, China Duration: 10 Jun 2002 → 14 Jun 2002

Keywords

Electrical properties
FTIR
Glass phase
Microwave ceramics
Raman spectroscopy

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

More information

10.1016/S0921-5107(02)00506-8

Cite this

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title = "Structural and electrical properties of BaTi4O9microwave ceramics incorporated with glass phase",

abstract = "BaTi4O9(BT4) microwave ceramics incorporated with ZnO-B2O3glass phase were fabricated by a conventional mixed oxide reaction method. A density of 4400 kg m-3was gotten for ceramic sintered at 1200 °C for 2 h, very close to the theoretical density of 4533 kg m-3of pure BaTi4O9. Shifting of the vibration modes in FTIR and Raman spectra was observed for the ceramics sintered at a higher temperature. Partial melting was also observed in these ceramics. The relative permittivity of the ceramics changed between 45 and 50 as the sintering temperature increased from 1200 to 1400 °C. These results indicated that by the incorporation of the glass phase, the sintering temperature of BaTi4O9ceramics could be reduced to 1200 °C while the dielectric ceramics had larger relative permittivities.",

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Structural and electrical properties of BaTi₄O₉microwave ceramics incorporated with glass phase. / Lu, S. G.; Kwok, Kin Wing; Chan, H. L.W. et al.
In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, Vol. 99, No. 1-3, 25.05.2003, p. 491-494.

Research output: Journal article publication › Conference article › Academic research › peer-review

TY - JOUR

T1 - Structural and electrical properties of BaTi4O9microwave ceramics incorporated with glass phase

AU - Lu, S. G.

AU - Kwok, Kin Wing

AU - Chan, H. L.W.

AU - Choy, C. L.

PY - 2003/5/25

Y1 - 2003/5/25

N2 - BaTi4O9(BT4) microwave ceramics incorporated with ZnO-B2O3glass phase were fabricated by a conventional mixed oxide reaction method. A density of 4400 kg m-3was gotten for ceramic sintered at 1200 °C for 2 h, very close to the theoretical density of 4533 kg m-3of pure BaTi4O9. Shifting of the vibration modes in FTIR and Raman spectra was observed for the ceramics sintered at a higher temperature. Partial melting was also observed in these ceramics. The relative permittivity of the ceramics changed between 45 and 50 as the sintering temperature increased from 1200 to 1400 °C. These results indicated that by the incorporation of the glass phase, the sintering temperature of BaTi4O9ceramics could be reduced to 1200 °C while the dielectric ceramics had larger relative permittivities.

AB - BaTi4O9(BT4) microwave ceramics incorporated with ZnO-B2O3glass phase were fabricated by a conventional mixed oxide reaction method. A density of 4400 kg m-3was gotten for ceramic sintered at 1200 °C for 2 h, very close to the theoretical density of 4533 kg m-3of pure BaTi4O9. Shifting of the vibration modes in FTIR and Raman spectra was observed for the ceramics sintered at a higher temperature. Partial melting was also observed in these ceramics. The relative permittivity of the ceramics changed between 45 and 50 as the sintering temperature increased from 1200 to 1400 °C. These results indicated that by the incorporation of the glass phase, the sintering temperature of BaTi4O9ceramics could be reduced to 1200 °C while the dielectric ceramics had larger relative permittivities.

KW - Electrical properties

KW - FTIR

KW - Glass phase

KW - Microwave ceramics

KW - Raman spectroscopy

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