Computer modeling of satellite peak in tin profile of float glass

• Published in: Journal of non-crystalline solids Vol. 271; no. 1; pp. 126 - 136
• Main Authors: Wang, Ting-Ji, Zhang, Hongyan, Zhang, Guowu, Yuan, Tongsuo
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.06.2000; Elsevier
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Chemical industry and chemicals; Exact sciences and technology; Glasses; Structure, analysis, properties; T240; D210; Heat treatment; Flat glass; Float glass; Tin Oxides; Numerical simulation; Surface analysis; Concentration distribution; Finite difference method
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/S0022-3093(00)00053-3

A one-dimensional finite difference computer model of the penetration of tin in float glass was used to investigate the mechanism of formation of the tin profile. It was found in the computer simulation that: (1) tin ions in the surface layer of the float glass are in motion after departing from the tin bath; (2) the tin ion motion is dependent on the thickness of the glass ribbon, and on the chemical component and temperature distribution in the atmosphere where the glass ribbon passes; (3) the tin profile with a satellite peak is formed while the glass ribbon passes in a region with an SO 2 atmosphere and a certain temperature distribution. The mechanism of formation of the satellite peak proposed by T.J. Wang (Glass Technol. 38 (3) (1997) 104) has been verified by this computer simulation. The satellite peak will be formed in cases where: (1) an adequate amount of Sn 2+ is oxidized to Sn 4+, and (2) the Sn 4+ is diffusing. The two conditions can be realized in a tin bath, and also in an annealing lehr with an SO 2 atmosphere.