期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 30, 期 12, 页码 2475-2480出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2010.04.026
关键词
Sol-gel process; Thin film; Bi12SiO20
The sol gel method was used to synthesize Bi12SiO20 thin films. Two synthesis routes with two different solvents, i.e., 2-ethoxyethanol and acetic acid, were used and compared. Thin films were deposited onto Pt/TiO2/SiO2/Si substrates by spin-coating at 3000 rpm and annealed at 700 degrees C for 1 h. A different coordination of the bismuth ion was observed in the sols prepared with acetic acid (AcOH), and as a result, stable sols were formed with a shorter gelation time t(G) = 84 h (c = 0.76 M), when compared with the sols prepared from 2-ethoxyethanol (EtoEtOH) t(G) = 580 h (c = 0.76 M). The microstructures of the Bi12SiO20 thin films prepared from sols using EtoEtOH were homogeneous and dense. On the other hand, a porous microstructure was observed for the Bi12SiO20 thin films deposited from the sol in which AcOH was used as the solvent. (C) 2010 Elsevier Ltd. All rights reserved.
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