Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28947
Title: Structural and electrical properties of BaTi4O9 microwave ceramics incorporated with glass phase
Authors: Lu, SG
Kwok, KW 
Chan, HLW 
Choy, CL
Keywords: Electrical properties
FTIR
Glass phase
Microwave ceramics
Raman spectroscopy
Issue Date: 2003
Publisher: Elsevier
Source: Materials science and engineering. B, Solid-state materials for advanced technology, 2003, v. 99, no. 1-3, p. 491-494 How to cite?
Journal: Materials science and engineering. B, Solid-state materials for advanced technology 
Abstract: BaTi4O9 (BT4) microwave ceramics incorporated with ZnO-B2O3 glass phase were fabricated by a conventional mixed oxide reaction method. A density of 4400 kg m-3 was gotten for ceramic sintered at 1200 °C for 2 h, very close to the theoretical density of 4533 kg m-3 of 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 BaTi4O9 ceramics could be reduced to 1200 °C while the dielectric ceramics had larger relative permittivities.
Description: Advanced Electronic-ceramic Materials. Proceedings of the 8th IUMRS-ICEM 2002, Xi'an, 10-14 June 2002
URI: http://hdl.handle.net/10397/28947
ISSN: 0921-5107
DOI: 10.1016/S0921-5107(02)00506-8
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