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Nanomaterials from Shungite Rocks

机译：碎石岩石中的纳米材料

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摘要

Size fractions of shungite rock modified by heat treatment in argon at 1400℃ have been characterized by X-ray diffraction; scanning electron microscopy in combination with energy dispersive X-ray microanalysis; transmission electron microscopy; optical microscopy; and IR, Raman, and Moessbauer spec-troscopies. The material consists largely of a mixture of carbonaceous material (a variety of imperfect nano-structures), silicon carbide, quartz, glass, and carbon-encapsulated Fe and FeC_x. The size fractions obtained using an electro-mass-classifier and magnetic separator are of interest as fillers for composite materials. A significant percentage of the carbonaceous material is associated with iron in porous globules, which allows it to be concentrated by magnetic separation. The Moessbauer spectrum of the magnetic component has low intensity, due not only to the low iron content but also to the small particle size of the iron and the loose state of the matrix. Some of the iron-carbon solid solution is in a superparamagnetic state, which transforms into a ferromagnetic state as the temperature is lowered.
机译：通过X射线衍射表征了在氩气中于1400℃热处理后改性的钨矿岩的粒度级分。扫描电子显微镜结合能量色散X射线显微分析；透射电子显微镜光学显微镜以及IR，Raman和Moessbauer光谱。该材料主要由碳质材料（各种不完善的纳米结构），碳化硅，石英，玻璃以及碳包裹的Fe和FeC_x的混合物组成。使用电-质量分级器和磁分离器获得的尺寸分数作为复合材料的填料是令人感兴趣的。碳质材料中有很大一部分与多孔球体中的铁缔合，从而可以通过磁选进行浓缩。磁性成分的Moessbauer光谱具有低强度，这不仅是由于铁含量低，而且还因为铁的粒径小和基体的松散状态。一些铁-碳固溶体处于超顺磁性状态，随着温度降低，其转变为铁磁性状态。

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  • 来源
    《Inorganic materials》 |2012年第11期|1102-1110|共9页
  • 作者

    V. V. Zyryanov; V. V. Kovalevski; S. A. Petrov; A. A. Matvienko;

  • 作者单位

    Institute of Solid-State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128 Russia;

    Institute of Geology, Karelian Research Centre, Russian Academy of Sciences, Pushkinskaya ul. 11, Petrozavodsk, 185910 Karelia, Russia;

    Institute of Solid-State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128 Russia;

    Institute of Solid-State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128 Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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