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Sonofragmentation of Ionic Crystals

机译：离子晶体的超声波灭火

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Mechanochemistry deals with the interface between the chemical and the mechanical worlds and explores the physical and chemical changes in materials caused by an input of mechanical energy. As such, the chemical and physical effects of ultrasound, i.e., sonochemistry, are forms of mechanochemistry. In this paper, the fragmentation of ionic crystals during ultrasonic irradiation of slurries has been quantitatively investigated: the rate of fragmentation depends strongly on the strength of the materials (as measured by Vickers hardness or by Young's modulus). This is a mechanochemical extension of the Bell-Evans-Polanyi Principle or Hammond's Postulate: activation energies for solid fracture correlate with binding energies of solids. Sonofragmentation is unaffected by slurry loading or liquid vapor pressure, but is suppressed by increasing liquid viscosity. The mechanism of the particle breakage is consistent with a direct interaction between the shockwaves created by the ultrasound (through acoustic cavitation) and the solid particles in the slurry. Fragmentation is proposed to occur from defects in the solids induced by compression-expansion, bending, or torsional distortions of the crystals.
机译：机械化学处理化学和机械世界之间的界面，并探讨了由机械能引起的材料的物理和化学变化。因此，超声波的化学和物理效应，即儿学，是机械化学的形式。在本文中，定量地研究了超声波照射期间的离子晶体的破碎：碎裂速率强烈取决于材料的强度（通过维氏硬度或杨氏模量测量）。这是贝尔evans-polanyi原理或哈蒙德假设的机械化学延伸：用于固体断裂的激活能量与固体的结合能相关。超声波沉着不受浆料负荷或液态蒸气压的影响，而是通过增加液体粘度来抑制。颗粒破裂的机理与由超声（通过声空化）和浆料中的固体颗粒产生的冲击波之间的直接相互作用一致。提出碎片从通过压缩 - 膨胀，弯曲或曲面的晶体诱导的固体中的缺陷发生。

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