摘要
本文报导了含炭耐火材料氧化过程中Ｓｉ、ＳｉＣ所发生的氧化还原反应。脱碳层中Ｓｉ和ＳｉＣ所发生的氧化还原反应对含炭耐火材料的抗氧化性起着重要作用。文中解释了在反应ＳｉＣ＋２ＣＯ→ＳｉＯ２十３Ｃ不能进行热力学温度内，ＳｉＣ仍能对含炭耐火材料中碳的氧化有抑制作用的原因．从而进一步阐明了Ｓｉ和ＳｉＣ通过ＳｉＣ气相扩散到脱碳层，再氧化生成ＳｉＯ２，沉积在气孔壁上，堵塞气孔的抗氧化机理．
he peper reports redox of Si and SiC with atmosphere in carbon-containing refractories. Redox produced by St and SiC with CO2,O2 etc in oxidized zone plays an important part in carbon-containing reffractories oxidation. It has been proved that SiC can restrain carbon oxidizing under the thermodynamic temperature at which SiC+2CO→SiO2+3C reaction couldn' t take place,oxidation-controlling mechanism of Si and SiC Can be explained by that they react with CO in carbon-containing zone where SiO gas Can be produced, then the po diffuses outward and reacts with CO2,O2 etc to form SiO2 which deposits on the pore wall and bloeks up the poes in the Carbon-containing refractories.
出处
《耐火材料》
CAS
北大核心
1995年第1期11-15,共5页
Refractories
关键词
含炭
耐火材料
抗氧化
硅
Carbon-containing refraclories Oxidation - resistance Silicon Silicon Carbide
