以棕刚玉和特级矾土为主要原料,以Al2O3微粉、SiO2微粉和纯铝酸钙水泥为结合体系,研究了棕刚玉和特级矾土加入量对Al2O3-SiO2系无水泥浇注料烘干及1 250℃3 h烧后性能的影响,并进行了显微结构分析和讨论.结果表明:在本试验条件下,Al2O3-SiO2系无水泥浇注料中特级矾土最佳加入质量分数为12.5%左右,1 250℃下的热态抗折强度可达22.1 MPa.Al2O3-SiO2系无水泥浇注料中莫来石的生成机制属于溶解-沉淀,且其热态抗折强度与原位莫来石生成情况密切相关.与棕刚玉相比,特级矾土更有利于莫来石的生成,故加入特级矾土更有利于提高无水泥浇注料的热态抗折强度.
参考文献
| [1] | Studart A R;Zhong W;Pandolfelli V C .Rheological design of zerocement self-flow eastables[J].American Ceramic Society Bulletin,1999,78(05):65-72. |
| [2] | Gerotto M.V.;Studart A.R. .Zero-Cement, High-Alumina Castables[J].American Ceramic Society bulletin,2000(9):75-84. |
| [3] | L. Mandecka-Kamien;K. Makuch .Active Aluminas for the Production of Zero-cement Refractory Castables[J].Interceram: International Journal for Bricks, Structural Clay Products, Refractories, Pottery, Fine Ceramics, Abrasives and Special Ceramics,2005(3):178-181. |
| [4] | Khalil N M .Heat resistance and thermomechanical behaviour of ultralow and zero cement castables[J].British Ceramic Transactions,2004,103(01):37-41. |
| [5] | Studart A R;Pandolfelli V C .Thermomechanical behavior of zeuo-cement,high-alumina castables[J].American Ceramic Society Bulletin,2000,79(10):53-60. |
| [6] | Zawrah M F;Khalil N M .Effect of mullite formation on properties of refxactory castables[J].Ceramics International,2001,27(06):689-694. |
| [7] | Risbud S H;Pask J A .SiO2-Al2O3 metastable phase equilibrium diagram without mullite[J].Journal of Materials Science,1978,13(11):2449-2454. |
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