Investigation on Clay Based Mullite-silica Rich Glass Composites  

作　　者：YAN Wen SHI Jinling LI Nan 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China [2]Joint International Research Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China

出　　处：《China's Refractories》2025年第1期18-24,共7页中国耐火材料(英文版)

基　　金：Research Project of Hubei Provincial Department of Science and Technology(Grant no.2024CSA075);Key Project of the National Natural Science Foundation of China(Grant No.U21A2058)for fnancially supporting this work.

摘　　要：Mullite-silica rich glass(MSRG)composites are a more efficient material than chamotte for industrial utilization of clay in refractory applications.The properties of the MSRG composites depend on the amount and composition of the mulite and glass phases,which are related to the chemical composition of the MSRG composites based on clay.In the present work,the relationship between the phase and the chemical composition of the MSRG composites,and the effects of the chemical composition of the glass phase on the viscosity and coefficient of thermal expansion(CTE)of the glass phase were discussed on the basis of the measurements on 17 MSRG composite samples produced from clay.It is found that the Al_(2)O_(3)/SiO_(2) ratio(AS ratio)in clay strongly affects the amount of the mullite and glass phases in the MSRG composites,and the distributions of SiO_(2),TiO_(2)and Al_(2)O_(3) contents in the mullite and glass phases.With the increase of the A/S ratio of clay,the mullite content increases but the the glass phase content decreases in the MSRG composites.The viscosity and CTE of the glass phase depend on its A/S ratio and the amount of impurity oxides.When the A/S ratio in the glass phase is less than 0.15,the viscosity of the liquid formed by the melting of the glass phase at elevated temperatures rapidly increases with the decrease in the A/S ratio.The CTE of the glass phase depends on the contents of Si0_(2)and(K_(2)O+Na_(2)O).

关 键 词：mullite-silica rich glass composite composition glass phase VISCOSITY coefficient of thermal expansion 

分 类 号：TB3[一般工业技术—材料科学与工程]