| 沉淀转化法制备不同形状的氢氧化镍及氧化镍超微粉末的研究 |
| A STUDY ON PREPARATION OF ULTRAFINE POWDERS OF Ni(OH)2 AND NiO WITH DIFFERENT SHAPES BY PRECIPITATION TRANSFORMATION METHOD |
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| 摘要: 本工作采用沉淀转化法制备了不同形状的氢氧化镍及氧化镍超微粉末，详细的研究了转化温度、沉淀转化剂及阻聚剂的浓度等实验参数对超微粉末组成和结构的影响。 |
| 关键词: 超微粉末 沉淀转化法 氢氧化镍 氧化镍 |
| 基金项目: |
| Abstract: Ultrafine powders of Ni(OH)2 and NiO with different shapes were prepared by precipitation transformation method. The influence of transformation temperature and concentrations of transformation agent and anti-agregative agent (a kind of surfactant tween-80) on phase composition and structure were studied in detail. The experimental results showed that, the precipitation transformation was not completed below 40℃, and the XRD determined results indicated two phases of Ni(OH)2 and NiC2O4·H2O coexisted. The precipitate was completely transformed when the transformation agent concentrations of NaOH is in the range of 0.1～0.05 mol·L-1, and the single phase Ni(OH)2 ultrafine powder was obtained. But the particle size increased with lowering concentrations of NaOH or anti-aggregative agent. The experimental results also showed that Ni(OH)2 particles are in the shape of needles in the presence of NO3- anion or of thin pieces when no NO3- anion exists. The NiO ultrafine powder was obtained by calcining Ni(OH)2 ultrafine powder. |
| Keywords: ultrafine powder precipitation transmutation method nickel hydroxide nickel oxide |
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| 周根陶,刘双怀,郑永飞.沉淀转化法制备不同形状的氢氧化镍及氧化镍超微粉末的研究[J].无机化学学报,1997,13(1):43-47. |
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