以MgB2作为抗氧化剂应用于镁碳耐火材料,分别在埋碳和空气气氛下煅烧,利用热重分析(TG-DSC)研究了MgB2在空气气氛下的反应行为,用X射线衍射分析(XRD)研究了埋碳条件各温度下的物相组成,用扫描电子显微镜( SEM)结合能谱分析仪(EDX)观察了试样的显微组织结构,并与Al、Si、B4C、Al+B4C、A1+ MgB2对比评价了MgB2的抗氧化性能.结果表明:MgB2在温度高于1000℃与CO反应,生成MgO、B2 O3和C,MsO与B2O3进一步反应生成Mg3B2O6；当温度高于1340℃,Mg3 B2O6熔化成为液相,填充在MgO骨料与基质周围,使得镁碳耐火材料结构致密,对抗氧化起到重要作用；B2O3 (1)蒸发与MgO反应生成Mg3 B2O6在镁碳耐火材料表面形成致密层；MgB2抗氧化效果次于B4C,优于Al粉,Si粉,镁碳耐火材料中MgB2的合理添加量约为3％；实验中还发现添加Al+ 10％MgB2的镁碳耐火材料取得了较好的抗氧化效果.
参考文献
| [1] | Benedetti B D;Acquarone B G .Corrsion resistance of resin-bonded magnesia-carbon refractories[J].British Ceramic Transactions,1989,88:55-57. |
| [2] | Cooper C F;Alexander I C;Hanpson C J .The role of graphite in the thermal shock resistance of refractories[J].British Ceramic Transactions,1985,84(02):57-62. |
| [3] | Zhang S;Hashimoto S;William E L .Hydration of aluminium mead additives for refractoires bond system[J].Taikabutsu,2004,56(10):488-497. |
| [4] | N. K. Ghosh;K. P. Jagannathan;D. N. Ghosh .Oxidation of Magnesia-Carbon Refractories with Addition of Aluminium and Silicon in Air[J].Interceram: International Journal for Bricks, Structural Clay Products, Refractories, Pottery, Fine Ceramics, Abrasives and Special Ceramics,2001(3):196-202. |
| [5] | 王诚训.镁碳质耐火材料[M].北京:冶金工业出版社,1995:98-99. |
| [6] | Rymon L T;Fichtner R;Theodor B .Study of the oxidation protection of MgO-C refractories hy meaos of boron carbide[J].Steel Research,1992,63:493-495. |
| [7] | A.S. Gokce;C. Gurcan;S. Ozgen .The effect of antioxidants on the oxidation behaviour of magnesia-carbon refractory bricks[J].CERAMICS INTERNATIONAL,2008(2):323-330. |
| [8] | Zhang S;Yamaguchi A .Effect of Al4SiC4 addition to carbon-containing refractories[J].Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi / Journal of the Ceramic Society of Japan,1995,103(03):235-239. |
| [9] | Wang T;Yamaguchi A .Oxidation protection of MgO-C refractories hy means of Al8B4C7[J].Journal of the American Ceramic Society,2001,84:577-582. |
| [10] | Hanagiri S;Harada T et al.Effects of the addition of metal and CaB6 to magnesia carbon bricks for converter[J].Taikabutsu,1992,44:490-498. |
| [11] | Yamaguchi A;Tanaka H .Behavior and effects of ZrB2 added to carbon-containing refrac tories[J].Refructories,1995,47(03):116-123. |
| [12] | Yang D;Sun H et al.Experimental study on the oxidation of MgB2 in air at high temperature.Supercond Sic[J].Technology(Elmsford,N.Y),2003,16:576-581. |
| [13] | Mapiravana J;Argent B B,R.Reactions of silicon and aluminium in MgO-graphite composites:2.Reaction pro,ducts[A].,1993:251-253. |
| [14] | 叶大伦;胡建华.实用无机物热力学数据手册[M].北京:冶金工业出版社,2002 |
| [15] | Yamaguchi A .Self-repairing function in the carbon-containing refractories[J].Journal of Applied Ceramic Technology,2007,4(06):490-495. |
| [16] | Yamaguchi A .Behaviour of boron carbide added to carbon-containing refractories[J].Taikabutsu,1984,36(10):558-563. |
| [17] | 王诚训.镁碳质耐火材料[M].北京:冶金工业出版社,1995:50-53. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%