以铁尾矿和碳黑为原料,采用碳热还原氮化法合成Si3N4粉.利用X射线衍射法测定产物相组成及相对含量,研究了合成温度和恒温时间对反应过程的影响.结果表明,合成温度对碳热氮化合成Si3N4粉的影响显著,随合成温度的升高,产物中Si3N4相含量增加,1450℃时Si3N4相含量最高,是最佳的合成温度.恒温时间对产物相组成的影响不大,但适当延长恒温时间可使还原氮化反应进行得更充分,恒温8h时产物中Si3N4含量最高,是较理想的恒温时间.合成过程中SiO的挥发导致试样较大的质量损失,且随恒温时间的延长而增大.
参考文献
| [1] | 朱胜元.尾矿综合利用是实现我国矿业可持续发展的重要途径[J].铜陵财经专科学校学报(综合版),2002(01):38-40. |
| [2] | Jorg M et al.Human and environmental contamination in the iron quadrangle[J].Applied Geochemistry,2000,15:193. |
| [3] | Das S K et al.Exploitation of iron ore for the development of ceramic tiles[J].WASTE MANAGEMENT,2000,20:725. |
| [4] | I. Licsko;L. Lois;G. Szebenyi .Tailings as a source of environmental pollution[J].Water Science and Technology,1999(10/11):333-336. |
| [5] | 向鹏成,谢英亮.尾矿利用的经济性潜力分析[J].矿产保护与利用,2002(01):50-54. |
| [6] | 蒲含勇,张应红.论我国矿产资源的综合利用[J].矿产综合利用,2001(04):19-23. |
| [7] | 张渊;李俊峰;索崇慧 .矿山尾矿综合利用及其环境治理的意义[J].农业与技术,2000,20(04):56. |
| [8] | Zhang S C;Cannon W R .Preparation of silicon nitride from silica[J].Journal of the American Ceramic Society,1984,67(10):691. |
| [9] | Mazdyasni K S;Cooke C M .Synthesis characterization and consolidation of Si3N4 obtained from ammonialysis of SiCl[J].Journal of the American Ceramic Society,1973,52(12):628. |
| [10] | 李文兰;符锡仁;黄校先 等.用氧化硅合成α-Si3N4粉末的研究[J].硅酸盐学报,198?,11(04):469. |
| [11] | Zheng J;Forslund B .Carbothermal preparation of β-Sialon powder at elevated nitrogen pressures[J].Journal of the European Ceramic Society,1988,19(02):175. |
| [12] | Durham S J P;Shanker K;Drew R A L .Carbothermal synthesis of silicon nitride,Effect of reaction conditions[J].Journal of the American Ceramic Society,1991,74(01):31. |
| [13] | 丘泰;徐洁;龚亦农.碳热还原法合成Si3《N4的研究[J].硅酸盐通报,1995(05):14. |
| [14] | H. Arik;S. Saritas .Production of Si3N4 by carbothermal reduction and nitridation of sepiolite[J].Journal of Materials Science,1999(4):0-0. |
| [15] | Kurt A O;Davies T J .Synthesis of Si3N4 using sepiolite and varins sources of carbon[J].Journal of Materials Science,2001,36(24):5898. |
| [16] | Han B Q;Li N .Preparation of β-SiC/Al2O3 composite from kaolinite gangue by carbothermal reduction[J].Ceramics International,2005,31(02):227. |
| [17] | K. Janghorban;H. R. Tazesh .Effect of catalyst and process parameters on the production of silicon carbide from rice hulls[J].Ceramics International,1999(1):7-12. |
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