| 煤矸石还原氮化合成O’-Sialon及热力学研究 |
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| 引用本文： | 张海军,刘战杰,钟香崇. 煤矸石还原氮化合成O’-Sialon及热力学研究[J]. 无机材料学报, 2004, 19(5): 1129-1137 |
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| 作者姓名： | 张海军 刘战杰 钟香崇 |
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| 作者单位： | 郑州大学高温功能材料河南省重点实验室 郑州 450052 |
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| 基金项目： | 河南省重大科技攻关项目(0122021000); 河南省高校青年骨干教师资助计划 |
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| 摘 要： | 采用拟抛物面规则评估了O’-Sialon、X相的吉布斯生成自由能,并从热力学上分析了O’-Sialon、β-Sialon、X相的合成过程.研究了以中国山西煤矸石为原料,还原氮化合成O’-Sialon的影响因素,包括还原剂(C或者Si)的用量、氮化温度等;结果表明,以金属Si为主要还原剂时O’-Sialon的合成效果较佳,其相对含量最高可以达到80％左右,提高氮化温度有利于O’-Sialon的合成.
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| 关 键 词： | O’-Sialon 煤矸石 氮化还原 热力学 合成 |
| 文章编号： | 1000-324X(2004)05-1129-09 |
| 收稿时间： | 2003-09-08 |
| 修稿时间： | 2003-09-08 |
Thermodynamic Study and Reduction-nitridation Synthesis of O -Sialon from Coal Gangue |
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| ZHANG Hai-Jun,LIU Zhan-Jie,ZHONG Xiang-Chong. Thermodynamic Study and Reduction-nitridation Synthesis of O -Sialon from Coal Gangue[J]. Journal of Inorganic Materials, 2004, 19(5): 1129-1137 |
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| Authors: | ZHANG Hai-Jun LIU Zhan-Jie ZHONG Xiang-Chong |
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| Affiliation: | Henan Key Laboratories of High Temperature Ceramics; Zhengzhou University; Zhengzhou 450052; China |
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| Abstract: | The Gibbs energy values of O’-Sialon and X phase were calculated by the thermodynamic quasi-paraboloid rule, and the process of synthesizing O’-Sialon, β-Sialon and X phase was analyzed thermodynamically. The effects of technological factors (such as amount of reducing agent added, nitriding temperature etc.) on the synthesis of O’-Sialon based on coal gangue by the reduction-nitridation method were investigated. The results show that the use of metallic Si powder as reducing agent is more effective in prompting O’-Sialon formation. About 80% O’-Sialon content may be attained, and the increase in nitriding temperature is advantageous to the synthesis of O’-Sialon. |
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| Keywords: | O'-Sialon coal gangue reduction-nitridation thermodynamic synthesis |
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