Chavhan, P. M. and Sharma, Anubha and Sharma, R. K. and Singh, Gurmeet and Kaushik, N. K. (2010) Dip coated 12CaO·7Al2O3 thin films through sol–gel process using metal alkoxide. Thin Solid Films, 519 (1). pp. 18-23. ISSN 0040-6090

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Abstract

Transparent nanostructured 12CaO·7Al2O3 thin films with cubic structure have been prepared on soda lime glass substrates via the sol–gel dip coating using the precursor sol solution at low temperature. The structural, compositional, morphological and optical properties of the 12CaO·7Al2O3 films and powder were studied using X-ray diffractometry (XRD), X-ray photoelectron spectroscopy, scanning electron microscopy (SEM) and atomic force microscopy. Optical properties of 12CaO·7Al2O3 films have been investigated using UV–visible spectroscopy. Two different precursor sols were prepared using calcium-2-ethyl hexonate and aluminium isopropoxide as precursor materials in isopropanol and ethylene glycol monomethyl ether solvents. Dip coated gel like films were dried at 120 °C for 15 min and subsequently heat-treated at 450 °C for 1 h in air atmosphere. The influence of films thickness and optical transparency with use of different solvent and sol concentration on microstructure of the films were established. In addition, XRD patterns revealed that 12CaO·7Al2O3 films have been composed of cubic phase. SEM observations exhibited that the films structure becomes more homogeneous using isopropanol as compared to ethylene glycol monomethyl ether solvent. The 12CaO·7Al2O3 films prepared using 2 (wt.%) sol in isopropanol had high transparency nearly 88% in wide visible range with maximum of 90% at 600 nm wavelength.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s. Elsevier B.V.
Uncontrolled Keywords:	Nanostructures, C12A7 thin films, Sol–gel, Optical properties
Subjects:	Materials Science Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	03 Apr 2012 10:38
Last Modified:	03 Apr 2012 10:38
URI:	http://npl.csircentral.net/id/eprint/84

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