摘要
以板状刚玉和熔融石英分别作为Al2O3和SiO2组分,借助薄片法和静态坩埚法研究化学组成对耐火材料抗钠冰晶石侵蚀的影响。研究结果表明,单一的Al2O3或SiO2抗钠冰晶石侵蚀性差,Al2O3中加入SiO2或者SiO2中加入Al2O3,抗钠冰晶石侵蚀性显著改善,当Al2O3∶SiO2(wt%)为20∶80时抗钠冰晶石侵蚀性最好,CRC值仅为6.59%。钠冰晶石完全溶解单一的Al2O3,对单一的SiO2则进行物理渗透,而对Al2O3-SiO2二元体系则发生化学反应生成霞石。高粘度的霞石起着屏障作用,阻碍了钠冰晶石的进一步渗透与侵蚀,提高了抗钠冰晶石侵蚀性。
The influence of chemical composition on the corrosion resistance to cryolite of refractory was studied by means of slice method and static crucible method with tabular corundum and fused quartz as components of Al2O 3 and SiO2 respectively.It has been showed that single Al2O3 or SiO2 component had poor resistance to cryolite corrosion.Adding SiO 2 to Al2O3 or Al2O3 to SiO2 significantly improves the resistance to cryolite corrosion.The resistance to cryolite is best when Al2O3∶SiO 2(wt%)is 20∶80,and the CRC value is only 6.59%.Cryolite completely dissolves a single Al2O3,and physically penetrates a single SiO 2,while the Al2O3-SiO 2 binary system reacts to produce nepheline.The high viscosity nepheline acts as a barrier to further penetration and corrosion of cryolite,and improves the corrosion resistance of cryolite.
作者
张欣
黄晨
唐安山
ZHANG Xin;HUANG Chen;TANG Anshan(School of Materials Science and Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Xianggang Ruitai Technology Company,Xiangtan 411102,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第7期2302-2307,共6页
Bulletin of the Chinese Ceramic Society
基金
湖南省自然科学研究基金(2020JJ6030)。
关键词
耐火材料
化学组成
静态坩埚法
抗侵蚀性
钠冰晶石
refractory
chemical composition
static crucible method
corrosion resistance
cryolite
