Al_(2)O_(3)外加量对Al_(2)O_(3)-SiO_(2)-ZnO-B_(2)O_(3)-Na_(2)O微晶玻璃涂层的影响  

Effect of Al_(2)O_(3)extra-addition on Al_(2)O_(3)-SiO_(2)-ZnO-B_(2)O_(3)-Na_(2)O glass-ceramics coatings

作　　者：丛鹤地 孙小飞[2] 马昭蕊 Cong Hedi;Sun Xiao-fei;Ma Zhaorui(School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450000,Henan,China;不详)

机构地区：[1]郑州大学材料学院,河南郑州450000 [2]中钢集团洛阳耐火材料研究院有限公司先进耐火材料全国重点实验室,河南洛阳471039

出　　处：《耐火材料》2025年第2期128-132,共5页Refractories

基　　金：河南省重点研发项目(221111231100)。

摘　　要：为满足某些特殊高压大型装备的使用需求,改善轻质耐火材料抗裂性能差,易吸湿的缺点,以SiO_(2)、ZnO、Al_(2)O_(3)、B_(2)O_(3)和四硼酸钠为原料,制备了低温烧成的轻质耐火材料表面涂层用Al_(2)O_(3)-SiO_(2)-ZnO-B_(2)O_(3)-Na_(2)O(ASZBN)微晶玻璃,结合FactSage 8.2热力学计算软件,探讨Al_(2)O_(3)外加量(外加质量分数分别为0、4%、8%和12%)对微晶玻璃涂层的TG-DSC、显微结构、弹性模量等的影响。结果表明:随着Al_(2)O_(3)外加量的增加,ASZBN玻璃体系的玻璃化转变温度降低,730℃进行热处理后玻璃表面裂纹数量先增加后减少,ASZBN微晶玻璃的弹性模量先降低后增加。低于700℃时,ASZBN微晶玻璃体系的黏度较高。但高于700℃后,黏度随着温度升高而骤降,并随Al_(2)O_(3)外加量的增加而增大。当Al_(2)O_(3)外加量为12%(w)时,730℃进行热处理后,玻璃涂层表面平整且裂纹不明显,弹性模量也较高。To meet the requirements of some specialized high-pressure large-scale equipment and improve the crack resistance and hygroscopicity of lightweight refractories,low-temperature fired Al_(2)O_(3)-SiO_(2)-ZnO-B_(2)O_(3)-Na_(2)O(ASZBN)glass-ceramics were developed for the surface coatings of lightweight refractories using SiO_(2),ZnO,Al_(2)O_(3),B_(2)O_(3),and sodium tetraborate as the raw materials.The effects of Al_(2)O_(3)extra-addition(0,4%,8%,and 12%,by mass)on the TG-DSC behavior,microstructure,and elastic modulus of the glass-ceramics coatings were investigated using FactSage 8.2 thermodynamic calculations.The results show that:with Al_(2)O_(3)extra-addition increasing,the glass transition temperature of the ASZBN glass system decreases;after heat treatment at 730℃,cracks on the glass surface first increase and then decrease,and the elastic modulus of the ASZBN glass-ceramics first decreases and then increases.The viscosity of the ASZBN glass-ceramic system is higher when the temperature is lower than 700℃.When the temperature is higher than 700℃,the viscosity drops sharply with temperature rising and increases with the increase of Al_(2)O_(3)extra-addition.When the Al_(2)O_(3)extra-addition is 12%,after heat treatment at 730℃,the glass coating exhibits a smooth surface with negligible cracks and a high elastic modulus.

关 键 词：涂层 微晶玻璃 Al_(2)O_(3) 弹性模量 热力学计算 

分 类 号：TU55[建筑科学—建筑技术科学]