| 液相脉冲放电制备纳米Ni-P合金粉工艺 |
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| 引用本文： | 曹瑜琦,俞宏英,赵海军,孟惠民,孙冬柏.液相脉冲放电制备纳米Ni-P合金粉工艺[J].北京科技大学学报,2010,32(4). |
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| 作者姓名： | 曹瑜琦 俞宏英 赵海军 孟惠民 孙冬柏 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(No.50374010) |
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| 摘 要： | 采用液相脉冲放电技术,通过改变脉冲电压、放电次数、Ni2+浓度、pH值,以及加入稀土添加剂(LaCl3、NdCl3)等途径,研究了制备工艺中各因素对Ni-P合金粉的结构、形貌、粒径以及对Ni2+转化率的影响.结果表明,脉冲能量是影响Ni-P合金粉粒径和Ni2+转化率的主要因素,提高脉冲电压或增加放电次数,Ni-P合金粉平均粒径明显减小,而Ni2+转化率增大.聚焦光束反射测量仪(FBRM)实时监测结果表明,在放电过程中Ni-P合金粉的形核、生长速率显著大于放电结束之后的形核、生长速率.加入LaCl3、NdCl3能使Ni-P合金粉粒径减小,LaCl3质量浓度为0.1g.L-1时制得的Ni-P合金粉平均粒径为156nm,NdCl3质量浓度为0.05g.L-1时其平均粒径为72nm.
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| 关 键 词： | Ni-P合金 粉末制备 脉冲放电 氯化镧 氯化钕 |
Synthesis of Ni-P nanopowders via pulse discharging in aqueous solution |
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| CAO Yu-qi,YU Hong-ying,ZHAO Hai-jun,MENG Hui-min,SUN Dong-bai.Synthesis of Ni-P nanopowders via pulse discharging in aqueous solution[J].Journal of University of Science and Technology Beijing,2010,32(4). |
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| Authors: | CAO Yu-qi YU Hong-ying ZHAO Hai-jun MENG Hui-min SUN Dong-bai |
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| Abstract: | The effects of pulse potential,discharging times,Ni2+ concentration,pH value and rare earth additives(LaCl3,NdCl3)on the conversion ratio of Ni2+ as well as the structure,shape and average diameter of Ni-P nanopowders prepared by pulse discharging in solution were investigated by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),and focused beam reflectance measurement(FBRM).It is indicated that discharging energy is the key factor that influences the size of Ni-P nanopowders and the... |
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| Keywords: | Ni-P alloy powder preparation pulse discharging lanthanum chloride neodymium chloride |
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