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Hybrid synthesis of zirconium oxycarbide nanopowders with defined and controlled composition

机译:具有定义和控制组合物的氧化锆纳米粉粉的杂化合成

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摘要

A combined synthesis strategy involving a carbothermal reduction and gelation approach with glycine as gelating agent was used to obtain Zr-based (oxy) carbide materials with defined and controlled composition. A comparatively low temperature approach (1500 degrees C) allows exploration of the ZrC-ZrO2 phase diagram and reproducibly leads to zirconium (oxy) carbide phases with different C/Zr ratios, as confirmed by combined X-ray diffraction (XRD) and transmission electron microscopy (TEM) data. The latter also indicates a chemically very homogeneous distribution of oxygen and carbon throughout the sample bulk, a prerequisite for further characterization of its intrinsic physico-chemical properties. Due to the general variability of the synthesis procedure - variation of metal precursor, amount of gelating agent and carbon precursor source - it is expected that the method can be easily adapted and transferred to other metal - oxycarbide materials.
机译:涉及用甘氨酸作为凝胶剂作为凝胶化剂的碳热还原和凝胶化方法的组合合成策略用于获得具有限定和受控组合物的Zr基(氧)碳化物材料。 相对低的温度方法(1500摄氏度)允许勘探ZrC-ZrO2相图探索,并通过组合的X射线衍射(XRD)和透射电子确认,可再现地导致具有不同C / Zr比率的锆(氧)碳化物相 显微镜(TEM)数据。 后者还表明,在整个样品体积中,氧气和碳的化学上均匀分布,其先决条件用于进一步表征其内在物理化学性质。 由于合成程序的一般可变性 - 金属前体的变化,胶凝剂和碳前体源的量 - 预期该方法可以容易地调整并转移到其他金属 - 氧化物材料中。

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  • 来源
    《RSC Advances》 |2019年第6期|共6页
  • 作者单位

    Univ Innsbruck Inst Phys Chem Innrain 52c A-6020 Innsbruck Austria;

    Univ Innsbruck Inst Phys Chem Innrain 52c A-6020 Innsbruck Austria;

    Univ Innsbruck Inst Phys Chem Innrain 52c A-6020 Innsbruck Austria;

    Tech Univ Wien Univ Serv Ctr Transmiss Electron Microscopy Wiedner Hauptstr 4-6 A-1040 Vienna Austria;

    Tech Univ Wien Univ Serv Ctr Transmiss Electron Microscopy Wiedner Hauptstr 4-6 A-1040 Vienna Austria;

    Univ Innsbruck Inst Phys Chem Innrain 52c A-6020 Innsbruck Austria;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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