Preparation and Structure of Ba2Ti9O20 and BaTi4O9 Ceramics Derived from Sol-Gel Powders

Abstract:

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Ba2Ti9O20 (B2T9) and BaTi4O9 (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.

Info:

Periodical:

Key Engineering Materials (Volumes 280-283)

Edited by:

Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li

Pages:

47-52

DOI:

10.4028/www.scientific.net/KEM.280-283.47

Citation:

S. G. Lu et al., "Preparation and Structure of Ba2Ti9O20 and BaTi4O9 Ceramics Derived from Sol-Gel Powders", Key Engineering Materials, Vols. 280-283, pp. 47-52, 2005

Online since:

February 2007

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Price:

$35.00

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