Abstract

Calcium fluoride powders were prepared by reacting solutions of calcium nitrate (\({{c}_{{{\text{Ca}}{{{({\text{N}}{{{\text{O}}}_{{\text{3}}}})}}_{{\text{2}}}}}}}\) = 0.3846 mol/L) and potassium fluoride (c_KF = 0.7692 mol/L) in a microreactor with intensely swirling flows at a reagent flow rate of 2.1–3.2 L/min. Colloidal solutions were thus prepared, whose settling yielded CaF₂ powders with a mean size of coherent scattering domains of about 40 nm. The particles had no crystallographic faceting. An increase in reagent flow rate prevented the formation of agglomerates and improved the grain-size uniformity of the powder.

中文翻译：

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在强涡流微反应器中合成氟化钙纳米颗粒

摘要

氟化钙粉末是通过将硝酸钙溶液（\({{c}_{{{\text{Ca}}}{{{({\text{N}}{{{\text{O}}}}_ {{\text{3}}}})}}_{{\text{2}}}}}}}\) = 0.3846 mol/L) 和氟化钾 ( c _KF = 0.7692 mol/L) 在微反应器中以 2.1–3.2 L/min 的试剂流速产生强烈的涡流。因此制备胶体溶液，其沉降产生具有约40nm的相干散射域的平均尺寸的CaF ₂粉末。颗粒没有结晶刻面。试剂流速的增加防止了团块的形成并改善了粉末的粒度均匀性。