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Synthesis and Mossbauer characterization of Cu and Cr doped magnetites

机译：Cu和Cr掺杂磁铁矿的合成及Mossbauer表征

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摘要

A detailed Mossbauer investigation of magnetites prepared under different hydrothermal conditions and doped with Cu and Cr is presented. The samples were characterized by means of room temperature Mossbauer spectrometry, infrared spectroscopy, and X-ray diffraction, Mossbauer results show that the hydrothermal method produces highy stoichiometric and relativelly well-crystallized magnetites. The results suggest that the best samples arc obtained when the alkaline solution is added quickly to the ferrous solution. It was also found that mixing the solutions under constant ultrasonic stirring produce magnetites with slightly better crystallinity and stoichiometry than the samples produced under magnetic or nitrogen bubbling stirring. The effect of the Cu and Cr on the hyperfine parameters is also presented and discussed.
机译：详细介绍了在不同水热条件下制备并掺杂有Cu和Cr的磁铁矿的Mossbauer研究。通过室温Mossbauer光谱，红外光谱和X射线衍射对样品进行表征，Mossbauer结果表明，水热法可产生高化学计量比和相对良好结晶的磁铁矿。结果表明，将碱性溶液快速添加到亚铁溶液中可获得最佳的样品。还发现，与在磁力或氮气鼓泡搅拌下产生的样品相比，在恒定超声波搅拌下混合溶液所产生的磁铁矿的结晶度和化学计量比稍好。还介绍和讨论了铜和铬对超细参数的影响。

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