Viscosity measurements of CaO-SiO2-Al2O3-(R2O,RO) quaternary melts and MAS-NMR study of glasses

Sohei Sukenaga, Noritaka Saito, Kiyoshi Kawakami, Kunihiko Nakashima

Research output: Contribution to conferencePaperpeer-review

Abstract

The effect of R2O or RO additives on the viscosities of CaO-SiO2-Al2O3 melts has been measured by rotating crucible viscometer. In addition, structural characterizations of these quenched vitreous samples have been investigated by 27Al and 29Si MAS-NMR spectra. The viscosities of CaO-SiO2-Al2O3 melts decreased with increasing the additive content of Li2O or Na2O. However, the viscosities of the melts increased with increasing the additive content of K2O, Rb2O or BaO. From the results of the 27Al and 29Si MAS-NMR spectra, the increase in viscosity of CaO-SiO2-Al2O3 ternary melts with addition of K2O, Rb2O or BaO are considered to be dependent on increase of polymerization degree of aluminosilicate anions in the melts.

Original languageEnglish
Pages452-455
Number of pages4
Publication statusPublished - 2006 Dec 1
Externally publishedYes
Event4th International Congress on the Science and Technology of Ironmaking, ICSTI 2006 - Osaka, Japan
Duration: 2006 Nov 262006 Nov 30

Other

Other4th International Congress on the Science and Technology of Ironmaking, ICSTI 2006
CountryJapan
CityOsaka
Period06/11/2606/11/30

ASJC Scopus subject areas

  • Metals and Alloys

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