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氣相爆轟法合成超細(xì)碳包鐵納米顆粒
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大連理工大學(xué)工業(yè)裝備結(jié)構(gòu)分析國(guó)家重點(diǎn)實(shí)驗(yàn)室

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國(guó)家自然科學(xué)基金資助(10872081, 11672067, 11672068)


Research on Synthesis of ultrafine Carbon-encapsulated Iron by Gaseous Detonation Method
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Dalian University of Technology

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    摘要:

    以汽化五羰基鐵為鐵源,采用乙炔為可燃?xì)夥?用氣相爆轟法成功合成了超細(xì)碳包鐵納米顆粒。利用TEM和XRD對(duì)合成產(chǎn)物進(jìn)行分析表明,爆轟產(chǎn)物是由碳?xì)?、?Fe和γ-Fe組成的球狀包覆型結(jié)構(gòu),產(chǎn)物分散性好,顆粒大小均勻、形態(tài)規(guī)則的球形超細(xì)納米碳包鐵顆粒,鐵核的平均粒徑為4.5nm；Raman光譜分析也證實(shí)該納米粒子表面由為石墨和無定型碳構(gòu)成包覆。進(jìn)一步將該納米碳包鐵顆粒在低真空溫度673K下進(jìn)行熱處理發(fā)現(xiàn),鐵核顆粒尺寸略有長(zhǎng)大,XRD譜線上γ-Fe相消失,轉(zhuǎn)化為α-Fe相,熱處理后磁飽和強(qiáng)度提高一倍以上。

    Abstract:

    Pentacarbonyl iron is used as iron source; acetylene is used as carbon source. Ultrafine carbon-encapsulated iron(Fe@C) nanoparticles was successfully synthesized by gaseous detonation method. XRD research carried out for the characterization indicated that the main phase of the detonation product was carbon, α-Fe and γ-Fe; and TEM experiment indicated that the product was ultrafine spherical shape particles and the inner Fe core was coated by a carbon outer shell. The particles have equable size, regular sharp and no agglomeration. The average diameter of Fe core is 4.5nm; Raman spectrum analysis also confirmed that the surface of the nanoparticles was consisted of graphite and amorphous carbon. The carbon-encapsulated iron particles were treated by heat treatment at low vacuum temperature 673K, then we can find the size of iron core particles grows slightly; γ-Fe phase turn to α-Fe phase in XRD and the saturation magnetization is more than doubled after heat treatment

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潘訓(xùn)岑,李雪琪,李曉杰,王小紅,閆鴻浩,王宇新.氣相爆轟法合成超細(xì)碳包鐵納米顆粒[J].稀有金屬材料與工程,2019,47(3):981~986.[Pan Xuncen, Li Xueqi, Li Xiaojie, Wang Xiaohong, Yan Honghao, Wang Yuxin. Research on Synthesis of ultrafine Carbon-encapsulated Iron by Gaseous Detonation Method[J]. Rare Metal Materials and Engineering,2019,47(3):981~986.]
DOI：10.12442/j. issn.1002-185X.20170633

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  • 收稿日期:2017-07-18
  • 最后修改日期:2017-09-19
  • 錄用日期:2017-09-29
  • 在線發(fā)布日期: 2019-04-10
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