首页|Effects of Al2O3-SiO2 Raw Material Types on Properties of Anorthite Based Insulation Refractories

Effects of Al2O3-SiO2 Raw Material Types on Properties of Anorthite Based Insulation Refractories

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
To optimize their Al2O3-SiO2 raw materials,anorthite based insulation refractories were prepared by the in-situ sintering process combined with the foaming method after sintering at 1 350 ℃ for 3 h,using green and pollution-free kaolin,kyanite,andalusite and sillimanite as Al2O3-SiO2 raw materials,respectively,and industrial CaCO3 as the CaO source.Effects of Al2O3-SiO2 raw material types on the physical properties,phase composition and microstructure were investigated.The results are as follows.All samples prepared by different Al2O3-SiO2 raw materials have hexagonal flake anorthite and a small amount of mullite and corundum.Their bulk density and thermal conductivity decrease in the order of using kaolin,andalusite,kyanite and sillimanite as the Al2O3-SiO2 raw material,but their apparent porosity increases.Moreover,in the sample with kaolin,the bonding between anorthite crystals on the pore walls is closer than that of the other samples,which is conducive to increasing the cold crushing strength.The bonding between anorthite crystals on pore walls gradually decreases in the order of using kyanite,andalusite and sillimanite as the Al2O3-SiO2 raw material,thus their cold crushing strength decreases accordingly.In comprehensive consideration,the properties of the sample from kyanite are the optimal.Its apparent porosity,thermal conductivity and cold crushing strength are 84.6％,0.141 W·m-1·K-1 and 1.89 MPa,respectively.

anorthite based insulation refractoriesAl2O3-SiO2 raw materialscrushing strengththermal conductivitymicrostructure

DU Juan、GUO Huishi、YANG Jialin、LI Wenfeng、GUI Yanghai、ZHAO Zhiqiang、LIU Yingfan

展开 >

School of Materials Science and Engineering,Henan University of Technology,Zhengzhou 450001,China

School of Materials and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450051,China

国家自然科学基金Henan Provice Science &Technology ProgramsHenan Provice Science &Technology ProgramsCultivation Programme for Yong Backbone Teachers in Henan University to Technology

51800212232321022310462321022310512142121

2024

10.19691/j.cnki.1004-4493.2024.01.005

中国耐火材料(英文版)
洛阳耐火材料研究院

中国耐火材料(英文版)

影响因子：0.026
ISSN：1004-4493
年,卷(期)：2024.33(1)
  • 24