Al_(4)SiC_(4)陶瓷在高温还原性气氛中的结构演变及机理研究  

Structure Evolution and Reaction Mechanism of Al4SiC4 Ceramics in High-temperature Reduction Atmosphere

作　　者：郑岐 孙侨阳 于景坤 袁磊 ZHENG Qi;SUN Qiaoyang;YU Jingkun;YUAN Lei(Zhong Min Chi Yuan Industry Co.,Ltd.,Dashiqiao 115100,Liaoning,China;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]中民驰远实业有限公司,辽宁大石桥115100 [2]东北大学冶金学院,辽宁沈阳110819

出　　处：《陶瓷学报》2024年第1期103-108,共6页Journal of Ceramics

基　　金：国家自然科学基金(52174302)。

摘　　要：碳化硅铝是一种良好的含碳耐火材料抗氧化剂。该研究以铝粉、硅粉和碳粉为原料制备出碳化硅铝陶瓷,并将其置于1000℃~1500℃温度范围内的还原气氛中,以模拟碳化硅铝在含碳耐火材料中的实际使用环境并对其性能和反应机理进行了研究。研究结果表明,在还原性气氛下,碳化硅铝在1000℃~1400℃温度范围内先与一氧化碳通过气相反应生成氧化铝、碳化硅、碳及铝硅酸盐玻璃相。当温度升至1500℃时,氧化铝和碳化硅与一氧化碳通过气相反应生成莫来石。上述反应将会在含碳耐火材料表面形成保护膜,阻止含碳耐火材料的氧化,提高了含碳耐火材料的抗氧化性。Al_(4)SiC_(4) is a promising additive for carbon-containing refractories to improve their oxidation resistance.Al_(4)SiC_(4) ceramics were synthesized from Al,Si,and C powders,which were then placed in the temperature range of 1000-1500℃ to simulate the real environment for carbon-containing refractory materials.It is experimentally showed that Al_(4)SiC_(4) initially reacted with CO to form Al_(2)O_(3),SiC,C and aluminosilicate glass in a reduction atmosphere in the temperature range 1000–1400 ℃.When the heating temperature was raised to 1500 ℃,Al_(2)O_(3) and SiC began to react with CO to form Al_6Si_(2)O_(13)(mullite).The two reaction processes led to the formation of protective films on surface of the carbon-containing refractories,thus inhibiting the oxidation process.

关 键 词：Al_(4)SiC_(4) 含碳耐火材料 抗氧化性 还原反应 

分 类 号：TQ174.75[化学工程—陶瓷工业]