In this study, the conversion of Celestite to SrCO₃ was studied by wet mechanochemical synthesis in a high‐energy ball mill and treatment with Na₂CO₃. For this purpose, solid strontium carbonate and soluble Na₂SO₄ were obtained after wet milling of Celestite powder and sodium carbonate. The solid phase was washed with water at room temperature by filter pressing. X‐Ray diffraction patterns showed that the SrCO₃ nanopowder was synthesized and conversion boosted with increasing the milling time up to 8 hours Also, Rietveld refinement analysis was used to calculate the fraction of SrCO₃ as well as structural properties of synthesized samples. It was found that initial Celestite could be converted to strontium carbonate with a purity more than 98% using high‐energy milling without simultaneous heating. The optimum milling time was determined as 4 hours resulting in formation of nanopowders with an average particle size around 90 nm. Field Emission Scanning Electron Microscopy (FE‐SEM), clearly showed the nanoscale structure of the synthesized powders.

中文翻译：

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天青石高效机械化学合成碳酸锶纳米粉

在这项研究中，通过在高能球磨机中进行湿机械化学合成并用Na ₂ CO ₃处理，研究了天青石向SrCO ₃的转化。为此目的，在将天青石粉末和碳酸钠湿磨之后，获得固体碳酸锶和可溶性Na ₂ SO ₄。通过压滤在室温下用水洗涤固相。X射线衍射图谱表明，合成了SrCO ₃纳米粉并随着长达8小时的研磨时间而提高了转化率。此外，使用Rietveld精炼分析法计算了SrCO ₃的分数以及合成样品的结构特性。发现使用高能研磨无需同时加热，即可将初始天青石转化为纯度超过98％的碳酸锶。确定最佳研磨时间为4小时，以形成平均粒径约为90nm的纳米粉。场发射扫描电子显微镜（FE‐SEM）清楚地显示了合成粉末的纳米级结构。