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Mechanochemical synthesis of strontium britholites: Reaction mechanism

机译：锶锶方锰矿的机械化学合成：反应机理

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摘要

The britholites have gained a great interest thanks to their potential applications as matrices for the confinement of the byproducts in the nuclear industry such as minor actinides and long-lived fission products. However, the preparation of britholites requires high temperatures, above 1200 °C. In this work, we strive to prepare these kinds of compounds by a mechanochemical synthesis at room temperature from the starting materials SrF2, SrCO3, Sr2P2O7, La2O3 and SiO2 using a planetary ball mill. The obtained results showed that the prepared products were carbonated apatites and the corresponding powders contained some unreacted silica and lanthana. To obtain pure britholites, a heat-treatment at 1100°C was required. The mechanism involved in the different steps of the reaction is discussed in this paper. The obtained results suggest that the use of raw materials containing no carbonate is expected to directly lead to pure britholites by appropriate milling at room temperature.
机译：由于其在核工业中作为副产物（例如次act系元素和长寿命裂变产物）的限制基质的潜在应用，水铁矿获得了极大的兴趣。但是，制备方沸石的过程需要1200℃以上的高温。在这项工作中，我们努力使用行星式球磨机在室温下通过机械化学合成方法从原料SrF2，SrCO3，Sr2P2O7，La2O3和SiO2制备这类化合物。获得的结果表明，所制备的产物是碳酸磷灰石，并且相应的粉末包含一些未反应的二氧化硅和氧化镧。为了获得纯方沸石，需要在1100℃下进行热处理。本文讨论了反应不同步骤所涉及的机理。获得的结果表明，通过在室温下进行适当的研磨，预期使用不含碳酸盐的原料将直接产生纯的水铁矿。

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