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对铝酸钙涂层石墨在铝碳耐火浇注料中的合成和应用提出了一些新的观点。用XRD(X射线衍射)、拉曼光谱和FTIR(傅里叶变换红外光谱)等测试表征方法研究了Al O_4(四面体)和AlO_6(八面体)单元在纳米涂层的演变过程。开展了关于溶胶-凝胶和传统耐火水泥异同点的拓展研究。用FESEM(场发射扫描电子显微镜)和XRD对改性和未改性的石墨进行了研究,并用ESEM(环境扫描电镜)进一步进行了特殊研究。研究表明,亲水薄膜中包含掺杂Ca的γ-Al_2O_3相对浇注料基质中石墨的保留具有决定性的影响。对比两个烧后浇注耐火材料的孔径分布和热重分析(TGA),结果发现具有石墨涂层的浇注耐火材料更加具有优势。通过静态抗渣侵蚀测试得到试样的侵蚀和渗透指数,并补充了微观结构的研究,表明孔隙率低且具有石墨涂层的浇注料在恶劣环境下的性能更为优越。
Some new ideas are put forward for the synthesis and application of calcium aluminate coated graphite in aluminum-carbon refractory castables. The evolution of Al O 4 (tetrahedron) and AlO 6 (octahedral) units in the nano-coating was investigated by XRD, Raman spectroscopy and Fourier transform infrared spectroscopy (FTIR). Developed a study on the similarities and differences between sol-gel and traditional refractory cements. The modified and unmodified graphite was investigated with FESEM (field emission scanning electron microscope) and XRD and further studied with ESEM (Environmental Scanning Electron Microscopy). The results show that the inclusion of Ca-doped γ-Al_2O_3 in hydrophilic films has a decisive influence on the retention of graphite in the castable matrix. Comparing the pore size distribution and the thermogravimetric analysis (TGA) of two fired cast refractory materials, it was found that cast refractory materials with graphite coating were more advantageous. Corrosion and penetration indices of specimens were obtained by static slag erosion resistance tests, supplemented by microstructural studies, showing that castings with low porosity and graphite coating are superior in harsh environments.