Abstract

Some results on the mechanochemical synthesis of apatites with simultaneous substitutions of calcium by lanthanum and of phosphate by silicate are presented. The reagents of reaction mixtures are taken such that to synthesize the compounds containing equal concentrations of lanthanum and silicon. The synthesis is performed in an AGO-2 planetary mill. The complete conversion of initial reagents in the synthesis of substituted apatite takes a longer period as compared to the time required for the synthesis of unsubstituted apatite. The mechanochemical synthesis time must be 40 min to synthesize lanthanum-and-silicate substituted apatite with a degree of substitution of <6 mol. When the concentration of substituents is higher than 6 mol, the total conversion of initial reagents occurs after 100 min of mechanical impact.

中文翻译：

---

镧和磷酸钙同时取代硅酸钙的机械化学合成磷灰石。

摘要

提出了磷灰石的机械化学合成方法，同时钙被镧取代，磷被硅酸盐取代。如此选择反应混合物的试剂以合成包含相等浓度的镧和硅的化合物。合成在AGO-2行星式磨机中进行。与合成未取代磷灰石所需的时间相比，在取代磷灰石的合成中初始试剂的完全转化需要更长的时间。机械化学合成时间必须为40分钟，以合成取代度<6 mol的镧和硅酸盐取代的磷灰石。当取代基的浓度高于6 mol时，在100分钟的机械冲击后，初始试剂的总转化率会发生。