Jiangling Li, Kuochih Chou & Qifeng Chen, Structure and viscosity of CaO–Al₂O₃–B₂O₃ based mould fluxes with varying CaO–Al₂O₃ mass ratios, ISIJ International, 2020, Volume 60, Issue 1, Pages 51-57, https://doi.org/10.2355/isijinternational.ISIJINT-2019-234
Structure and viscosity of CaO–Al₂O₃–B₂O₃ based mould fluxes with varying CaO–Al₂O₃ mass ratios
|Author:||Li, Jiangling1,2; Chou, Kuochih2; Shu, Qifeng2,3|
1College of Materials Science and Engineering, Chongqing University
2School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
3Process Metallurgy Research Unit, University of Oulu
|Online Access:||PDF Full Text (PDF, 1.1 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020041415349
Iron and Steel Institute of Japan,
|Publish Date:|| 2020-04-14
The effect of CaO/Al₂O₃ ratio on the structure of CaO–Al₂O₃–B₂O₃ based glassy mould fluxes was investigated by employing ²⁷Al and ¹¹B Triple Quantum Magic-angle spinning nuclear magnetic resonance (3QMAS-NMR) and Raman spectroscopy. ²⁷Al and ¹¹B 3QMAS-NMR spectrums showed that Al3+ mainly forms [AlO₄] as a network former and B3+ mainly forms [BO₃] groups in CaO–Al₂O₃–B₂O₃ based glasses. Raman spectrum showed existences of different [AlO₄] structure units and BO₃ pyro-borate units. In addition, deconvolution results on Raman spectrums indicate that the degree of polymerization of aluminate network in CaO–Al₂O₃–B₂O₃ based glasses decreases with the increase of CaO–Al₂O₃–B₂O₃ ratio. The effect of CaO–Al₂O₃–B₂O₃ ratio on viscosity of CaO–Al₂O₃–B₂O₃ based glassy mould fluxes was investigated by employing the rotating-cylinder method. The viscosity decreases with increasing CaO–Al₂O₃–B₂O₃ ratio in CaO–Al₂O₃–B₂O₃ based mould flux. Correlation between viscosity and structural information of investigated mould fluxes was explored.
|Pages:||51 - 57|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
Financial support from the Natural Science Foundation of China (NSFC contract No. 51774026 and 51704050) and the Academy of Finland for Genome of steel grant (No. 311934) is gratefully acknowledged.
© 2020 ISIJ. Published in this repository with the kind permission of the publisher.