氧化铁 硫 氧化硅和粘土在炭石墨化过程中的催化作用及其在工业应用中的可行性

THE CATALYSIS OF FERRIC OXIDE SULFUR SILICON DIOXIDE AND CLAY IN THE GRAPHITIZATION PROCESS AND THE POSSIBILITY OF THEIR INDUSTRIAL APPLICATION

本文研究了氧化铁、硫、氧化硅和粘土等对炭制品石墨化的催化作用,探讨了上述物质的催化机理以及它们对制品理化性能的影响和工业应用的可行性。发现这些物质列碳的石墨化均具有一定的催化作用。但由于硫在石墨化过程中会产生“puffing”效应,粘土会使制品内部产生许多微小裂纹,都使制品的体积密度和抗压强度迅速下降;氧化硅在热处理过程中生成碳化硅而不能在较低的温度下挥发逸出,因此,这三种物质作为炭制品石墨化的催化剂应用于工业生产是不可行的。氧化铁不仅对炭制品的石墨化具有很好的催化作用,而且,还可使制品的某些性能得到一定的改善,同时,对硫的“puffing”效应具有理想的抑制效果,是工业生产应用的一种理想的催化剂。氧化硅和氧化铁的混合物在其比例为2:8时,也具有一定的工业应用价值。

The catalysis of ferric oxide, sulfur, silicon dioxide and clay in the graphitization process of carbon was studied. The catalytic mechanism of the above substances, their influences on the physical and chemical properties of the products and the possibility of the industrial application were considered and discussed. We discovered that all these catalysts have the catalytic reactions. But sulfur can produce Puffing Effect and clay can produce many slight cracks in the carbon products. These make a decrease in bulk density and compressive strength. Silicon dioxide turns into silicon carbide in the heat treatment and it can not volitilize at lower temperature. Thus, the three substances cannot be taken as graphitization catalyst in the industrial production. Ferric oxide is a good catalyst of graphitization. It can improve some properties of products and it is also an ideal inhibitor of Puffing Effect. It is an ideal catalyst in the industrial application. The mixture of ferric oxide and silicon oxide with a oportion of two to eight can also be used in the industrial production.