The effect of mechanical activation of a mixture of micron-sized rutile and lithium carbonate in a Pulverisette-5 ball mill on the kinetics of the second stage of Li₄Ti₅O₁₂ synthesis was investigated. The values of the energy of activation of the second stage of lithium pentatitanate synthesis from starting mixtures that were mechanically activated for 1 and 60 min were determined to be 463 ± 23 kJ·mol⁻¹ and 393 ± 20 kJ·mol⁻¹, respectively. It was shown that mechanical activation of the starting mixture leads to the destruction of lithium carbonate with the release of CO₂ and an increase in the reactivity of TiO₂, which strongly influences the synthesis of lithium pentatitanate. The results of our study demonstrate that mechanical activation promotes a reduction in the temperature of the first stage of lithium pentatitanate synthesis, that is, the formation of Li₂TiO₃, by approximately 230°С and a reduction in the temperature of the second stage, i.e., the the formation of Li₄Ti₅O₁₂, by 50 °C. We show that single-phase Li₄Ti₅O₁₂ with a particle size of ca. 200 nm can be successfully synthesized from a mechanically activated starting mixture at 750 °C with a 3 h holding time or at 800 °C with a 0.5 h holding time.

研究了在Pulverisette-5球磨机中机械活化微米级金红石和碳酸锂的混合物对Li ₄ Ti ₅ O ₁₂合成第二阶段动力学的影响。测定的五钛锂合成第二级的激活的能量从起始混合物进行1分钟和60分钟进行机械活化的，该值是463±23千焦耳·摩尔^-1和393±20千焦·摩尔^-1，分别。结果表明，起始混合物的机械活化导致碳酸锂的破坏和CO ₂的释放以及TiO ₂反应性的提高。，这会严重影响五钛酸锂的合成。我们的研究结果表明，机械活化可促进戊二酸锂合成第一阶段的温度降低，即形成Li ₂ TiO ₃约230°С，并且降低第二阶段的温度即在50℃下形成Li ₄ Ti ₅ O ₁₂。我们表明，单相Li ₄ Ti ₅ O ₁₂的粒度约为ca。在750°C下保持3 h或在800°C下保持0.5 h可以从机械活化的起始混合物成功合成200 nm。