Preparation of BaSm2Ti4O12 Microwave Dielectric Ceramics via a Polyacrylamide Precursor

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A modified polyacrylamide precursor method is presented to synthesize BaSm2Ti4O12 microwave dielectric ceramics. Under an alkaline circumstance, all the cations together with the monomer and bridging agent were dispersed into a hydrous solution with the aid of chelating agent EDTA. This mixture was initiated at about 90°C, dried, calcined at 1000°C for 2hs and finally turned into well-crystallized and single-phased BaSm2Ti4O12 ceramic powder, which was modeled and sintered at 1250°C for 2hours into well-sintered ceramics. Differential thermal analysis, thermogravimetric analysis, X-ray powder diffraction and transmission electron microscope were used to characterize the process. Microwave dielectric properties measured by a resonating cavity method contain a dielectric constant (εr) about 77.0 and quality factor (Q×f) lager than 11000.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

252-254

DOI:

10.4028/www.scientific.net/KEM.336-338.252

Citation:

X. L. Huang et al., "Preparation of BaSm2Ti4O12 Microwave Dielectric Ceramics via a Polyacrylamide Precursor", Key Engineering Materials, Vols. 336-338, pp. 252-254, 2007

Online since:

April 2007

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Price:

$35.00

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