标题： 由回旋管微波辐射引发的BaTiO3超快固态化学合成 显示英文标题

标题： Ultrafast solid-state chemical synthesis of BaTiO3 initiated by gyrotron microwave radiation

摘要： 这项工作展示了在多模腔反应器中，利用24 GHz回旋管产生的连续微波辐射下，二氧化钛固态合成的研究结果。 结果显示，在初始化学计量反应混合物（由超细碳酸钡和二氧化钛粉末组成）中，由微波辐射引发的细尺度热不稳定性区域，合成过程可在1.5至7分钟内完成，目标产物产率可达90%。 基于一个涉及稳态麦克斯韦方程和热传导方程迭代求解的多模反应器真实数值模型，证明了在细尺度热不稳定性发展的区域，特定吸收功率在输入微波功率为400 W时可达到670 W/cm3。 显示英文摘要

摘要： This work presents the results of a study on the solid-state synthesis of barium titanate under continuous microwave radiation from a 24 GHz gyrotron in a multimode cavity reactor. It is shown that in localized domains where fine-scale thermal instabilities develop, initiated by microwave radiation within the initial stoichiometric reaction mixture of ultrafine barium carbonate and titanium dioxide powders, the synthesis can proceed within 1,5 - 7 minutes, achieving a target product yield of up to 90%. Based on a developed realistic numerical model of the multimode reactor, involving an iterative solution of stationary Maxwell and heat conduction equations, it is demonstrated that the specific absorbed power in the domains where fine-scale thermal instabilities develop can reach 670 W/cm3 under an input microwave power of 400 W.