Melting Properties and Viscosity of SiO2‐CaO‐Al2O3‐B2O3 System. Issue 6 (5th January 2015)

• Record Type: Journal Article
• Authors: Wang, Lin; Cui, Yaru; Yang, Jian; Zhang, Chen; Cai, Dexiang; Zhang, Jianqiang; Sasaki, Yasushi; Ostrovski, Oleg; Yu, Aibing
• Is Part Of: Steel research international. Volume 86:Issue 6(2015:Jun.)
• Page Start: 670
• Page End: 677
• Publication Date: 2015-01-05
• Subjects: Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.201400353
• Languages: English
• ISSNs: 1611-3683

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="srin201400353-sec-0001" sec-type="section"> <p>This paper investigated melting properties and viscosity of SiO₂‐CaO‐Al₂O₃‐B₂O₃ fluxes with a mass ratio of CaO/SiO₂ from 0.83 to 1.5 and B₂O₃ content from 5 to 9 wt%. Melting properties of these fluxes were studied using the hot stage microscopy method; viscosity was measured using the rotating cylinder method. Break temperature was also determined from the viscosity change with temperature in flux cooling process. Equilibrium liquidus temperature was calculated using FactSage. Increase in CaO/SiO₂ ratio was found to decrease hemispherical temperature and viscosity. The addition of B₂O₃ did not significantly affect hemispherical temperature but decreased the flux viscosity. Viscosity was analyzed in relation to the flux structure. The increase of the CaO/SiO₂ ratio reduced the degree of flux polymerization, and B₂O₃ apparently acted as a weak network modifier under the low concentration of B₂O₃. The experimental viscosity was in a good agreement with calculated viscosity using the modified NPL model.</p> </sec> </abstract>