AlO1.5/SiO2 substitution effect on the viscosity of alkali silicate melts

IF 1.1 4区工程技术 Q4 Engineering

High Temperatures-high Pressures Pub Date : 2023-01-01 DOI:10.32908/hthp.v52.1437

S. Sukenaga, R. Ikoma, M. Tashiro, Y. Chiba, S. Kawanishi, H. Shibata

引用次数: 0

Abstract

The effect of alumina addition on the viscosity of silicate melts is strongly related to the type of non-framework cations; however, the origin of these interactions is not well understood. In this study, we measured the viscosity change in selected alkali disilicate (R2O·2SiO2, R: Na or Li) melts by varying the AlO1.5/SiO2 molar ratio (AlO1.5 = 0–16.8 mol%) within the 1373–1823 K temperature range. We observed that as the molar ratio increased, sodium silicate viscosity increased, whereas lithium silicate viscosity was not affected. Aluminum-27 nuclear magnetic resonance spectra of the quenched glasses indicated that the aluminum cations in both types of alkali silicate melts were mostly present as AlO4 tetrahedra. In contrast to sodium-containing systems, the shear strain on the AlO4 tetrahedron was greater for lithium aluminosilicate glass. Our findings indicated that the degree of shear strain on AlO4 plays an essential role in controlling the viscosity of aluminosilicate systems.

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AlO1.5/SiO2取代对碱硅酸盐熔体粘度的影响

氧化铝的加入对硅酸盐熔体粘度的影响与非骨架阳离子的类型密切相关;然而，这些相互作用的起源还不是很清楚。在1373 ~ 1823 K的温度范围内，通过改变AlO1.5/SiO2的摩尔比(AlO1.5 = 0 ~ 16.8 mol%)，我们测量了选定的二硅酸碱(R2O·2SiO2, R: Na或Li)熔体的粘度变化。我们观察到，随着摩尔比的增加，硅酸钠粘度增加，而硅酸锂粘度不受影响。淬火玻璃的铝-27核磁共振谱表明，两种碱硅酸盐熔体中的铝阳离子大多以AlO4四面体的形式存在。与含钠体系相比，铝硅酸盐锂玻璃在AlO4四面体上的剪切应变更大。研究结果表明，AlO4的剪切应变程度对铝硅酸盐体系的粘度起着至关重要的控制作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Temperatures-high Pressures THERMODYNAMICS-MECHANICS

CiteScore

1.00

自引率

9.10%

发文量

期刊介绍： High Temperatures – High Pressures (HTHP) is an international journal publishing original peer-reviewed papers devoted to experimental and theoretical studies on thermophysical properties of matter, as well as experimental and modelling solutions for applications where control of thermophysical properties is critical, e.g. additive manufacturing. These studies deal with thermodynamic, thermal, and mechanical behaviour of materials, including transport and radiative properties. The journal provides a platform for disseminating knowledge of thermophysical properties, their measurement, their applications, equipment and techniques. HTHP covers the thermophysical properties of gases, liquids, and solids at all temperatures and under all physical conditions, with special emphasis on matter and applications under extreme conditions, e.g. high temperatures and high pressures. Additionally, HTHP publishes authoritative reviews of advances in thermophysics research, critical compilations of existing data, new technology, and industrial applications, plus book reviews.