Effect of SiO2/Al2O3and TiO2/SiO2ratios on the viscosity and structure of the TiO2-MnO-SiO2-Al2O3welding flux system

Jong Bae Kim; Il Sohn

doi:10.2355/isijinternational.54.2050

Effect of SiO₂/Al₂O₃and TiO₂/SiO₂ratios on the viscosity and structure of the TiO₂-MnO-SiO₂-Al₂O₃welding flux system

Jong Bae Kim, Il Sohn

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

12 Citations (Scopus)

Abstract

The effect of SiO₂/Al₂O₃and TiO₂/SiO₂ratios on the viscosity of the TiO₂-MnO-SiO₂-Al₂O₃welding flux system was studied using the rotational spindle method. The viscosity was measured at the fully liquid region of the melt from 1 773 K to the break temperature at approximately 1 623 K. Higher TiO₂/SiO₂ratio resulted in lower viscosity in the temperature range of interest. The SiO₂dominant slag system showed higher viscosity values than the Al2O₃dominant slag in the present TiO₂based system until a SiO₂/Al₂O₃ratio of 1.61. Fourier transform infrared (FTIR) results revealed the [SiO₄]^4--tetrahedral symmetric stretching vibrations and the [AlO₄]^5--tetrahedral asymmetric stretching vibration became weaker with higher TiO₂/ SiO₂, which was also apparent with the increase in the extended basicity ((TiO₂+MnO)/(SiO₂+Al₂O₃)). The Al-O-Si bending vibration and [SiO₄]^4--tetrahedral symmetric stretching vibrations were also pronounced with higher SiO₂/Al₂O₃ratio. From the X-ray photoelectron spectroscopy (XPS) results, the bridged oxygen (O⁰) slightly decreased with higher TiO₂/SiO₂and increased with higher SiO₂/Al₂O₃.

Original language	English
Pages (from-to)	2050-2058
Number of pages	9
Journal	ISIJ International
Volume	54
Issue number	9
DOIs	https://doi.org/10.2355/isijinternational.54.2050
Publication status	Published - 2014 Jan 1

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Kim, J. B., & Sohn, I. (2014). Effect of SiO₂/Al₂O₃and TiO₂/SiO₂ratios on the viscosity and structure of the TiO₂-MnO-SiO₂-Al₂O₃welding flux system. ISIJ International, 54(9), 2050-2058. https://doi.org/10.2355/isijinternational.54.2050

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abstract = "The effect of SiO2/Al2O3and TiO2/SiO2ratios on the viscosity of the TiO2-MnO-SiO2-Al2O3welding flux system was studied using the rotational spindle method. The viscosity was measured at the fully liquid region of the melt from 1 773 K to the break temperature at approximately 1 623 K. Higher TiO2/SiO2ratio resulted in lower viscosity in the temperature range of interest. The SiO2dominant slag system showed higher viscosity values than the Al2O3dominant slag in the present TiO2based system until a SiO2/Al2O3ratio of 1.61. Fourier transform infrared (FTIR) results revealed the [SiO4]4--tetrahedral symmetric stretching vibrations and the [AlO4]5--tetrahedral asymmetric stretching vibration became weaker with higher TiO2/ SiO2, which was also apparent with the increase in the extended basicity ((TiO2+MnO)/(SiO2+Al2O3)). The Al-O-Si bending vibration and [SiO4]4--tetrahedral symmetric stretching vibrations were also pronounced with higher SiO2/Al2O3ratio. From the X-ray photoelectron spectroscopy (XPS) results, the bridged oxygen (O0) slightly decreased with higher TiO2/SiO2and increased with higher SiO2/Al2O3.",

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