Effect of Zircon Addition on Properties of Low Carbon AL_2O_3-C Refractories

作     者：ZHANG Feifei YU Renhong ZHOU Ningsheng 

作者机构：High Temperature Materials InstituteHenan University of Science and Technology 

出 版 物：《China's Refractories》 (中国耐火材料（英文版）)

年 卷 期：2014年第23卷第1期

页      面：38-42页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the Natural Science Foundation of Henan Educational Committee ( N0. 2011B430011 and N0. 13B430991) 

主　　题：carbothermal reduction and nitridation zircon alumina-carbon refractories zirconia-nitride oxidation resistance 

摘      要：Using tabular alumina as aggregate,tabular alumina fines,reactive alumina ultra-fines,aluminum powders,silicon powders,carbon black,flake graphite,B4 C and zircon fines as matrix,low carbon Al2O3-C refractories were *** of zircon powders additions （0,3%,5% and 7%,in mass,the same hereinafter） on properties,phase composition and microstructure were *** results show that the ZrO2-nitride can be in-situ formed through carbothermal reduction and nitridation in Al2O3-C *** the increase of zircon powder,the oxidation resistance of the Al2O3-C refractories improves obviously,the oxidized layer thickness decreases from 7.94 mm without zircon to 2.71 mm with 5% *** at 1 400 ℃ of the Al2O3-C refractories reaches the maximum 14.9 MPa when zircon addition is 5%.With the increase of zircon powder,the apparent porosity and bulk density change a little,CMOR and CCS increase.