| 溶剂热制备条件对镍晶体结构的影响 |
| Effect of Solvothermal Reduction Process on Crystal Phase of Nickel |
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| 摘要: |
| 关键词: 有机溶剂 镍 晶体结构 |
| 基金项目: |
| Abstract: Nickel powders were obtained after chemical reduction of nickel chloride by KBH4 using absolute ethylenediamine as solvent in a stainless autoclave. The product was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). XRD results show that the as-prepared sample have different crystal structures at different reaction temperatures. It was face-centered cubic (fcc) nickel under 200 ℃, and there was only hexagonal close-packed (hcp) Ni above 300 ℃. At 250 ℃, the patterns indicate that both fcc and hcp phases of Ni coexist in the as-prepared sample. When the ethylenediamine was respectively substituted by benzene and toluene, only fcc phase nickel was obtained. SEM and TEM indicate that the fcc Ni is nano-particles with about 100 nm in diameter, and hcp nickel is nano-crystalline clusters. |
| Keywords: organic solvent nickel crystal phase |
| 投稿时间：2004-09-20 修订日期：2004-12-08 |
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| 米远祝,刘应亮,肖勇,袁定胜,张静娴.溶剂热制备条件对镍晶体结构的影响[J].无机化学学报,2005,21(4):603-606. |
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