| 高功率微波等离子体环境下甲烷浓度对金刚石膜的影响 |
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| 引用本文： | 罗凯,汪建华,余军火,翁俊.高功率微波等离子体环境下甲烷浓度对金刚石膜的影响[J].化工学报,2018,69(Z2):505-511. |
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| 作者姓名： | 罗凯 汪建华 余军火 翁俊 |
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| 作者单位： | 武汉工程大学湖北省等离子体化学与新材料重点实验室, 湖北 武汉 430073 |
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| 基金项目： | 国家自然科学基金项目（51402220）；湖北省教育厅基金项目（Q20151517）；武汉工程大学科学研究基金项目（K201506）。 |
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| 摘 要： | 在实验室自制的10 kW微波等离子体化学气相沉积装置中，分析了高功率微波等离子体环境中甲烷浓度对金刚石膜生长的影响。利用等离子体发射光谱诊断分析高功率微波等离子体放电环境的特征，同时利用SEM及Raman光谱对不同沉积条件下获得的金刚石膜的形貌及质量进行表征，以确定高功率微波等离子体环境下金刚石膜生长的最优甲烷浓度范围。实验表明在保持微波功率为5000 W，CH4/H2≤1%时，金刚石膜中二次形核现象明显，晶粒尺寸较小；CH4/H2≥2.5%时，金刚石膜可获得较大的晶粒，但易于产生孪晶体；CH4/H2=1.5%～2%时，可获得晶粒完整且质量较高的金刚石膜。
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| 收稿时间： | 2018-10-09 |
| 修稿时间： | 2018-11-14 |
Effect of methane concentration on diamond film in high power microwave plasma system |
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| LUO Kai,WANG Jianhua,YU Junhuo,WENG Jun.Effect of methane concentration on diamond film in high power microwave plasma system[J].Journal of Chemical Industry and Engineering(China),2018,69(Z2):505-511. |
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| Authors: | LUO Kai WANG Jianhua YU Junhuo WENG Jun |
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| Affiliation: | Key Laboratory of Plasma Chemistry and Advanced Materials of Hubei Province, Wuhan Institute of Technology, Wuhan 430073, Hubei, China |
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| Abstract: | In a laboratory-made 10 kW microwave plasma chemical vapor deposition (MPCVD) apparatus, the influence of methane concentration on the growth of diamond film under a high-power microwave plasma was analyzed. The characteristics of high-power microwave plasma discharge environment were diagnosed by plasma emission spectroscopy. At the same time, the morphology and quality of diamond films obtained under different deposition conditions were characterized by SEM and Raman spectroscopy to determine diamonds in a highpower microwave plasma environment. The optimal methane concentration range for membrane growth was abtained. Experiments show that when microwave power is kept at 5000 W, when the CH4/H2 is less than 1%, the secondary nucleation phenomenon in the diamond film is obvious, and the grain size is small; when the CH4/H2 is more than 2.5%, the diamond film can get larger crystal grains, but easy to produce germanium crystals; when CH4/H2=1.5%-2%, diamond films with complete crystal grains and high quality can be obtained. |
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