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Title: Preparation and structure of Ba2Ti9O20 and BaTi4O9 ceramics derived from sol-gel powders
Authors: Lu, SG
Chen, H
Mak, CL 
Wong, KH
Chan, HLW 
Choy, CL 
Keywords: Ba2Ti9O20
Microwave dielectrics
Sol-gel process
Issue Date: 2005
Publisher: Scientific.Net
Source: Key engineering materials, 2005, v. 280-283, no. I, p. 47-52 How to cite?
Journal: Key engineering materials 
Abstract: Ba2Ti9O20 (B2T9) and BaTi 4O9 (BT4) ceramics have been fabricated using sol-gel technique. The sol-gel derived powder was produced from barium acetate and butyl titanate using acetic acid as solvent. The as-prepared powders were then calcined at different temperatures ranging from 600° to 1200°C. After that, the powder was pressed into pellets and further sintered at different temperatures ranging from 1250°C to 1380°C. XRD characterization and Raman spectroscopy showed that after calcining the sol-gel powder at 900°C for 2 h and sintering the pressed pellets at 1330°C for 4 h, triclinic B2T9 and orthorhombic BT4 ceramics could be obtained, The dielectric constant and Q-value are 35 and 1910 at 6.1 GHz.
ISSN: 1013-9826
EISSN: 1662-9795
Appears in Collections:Conference Paper

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