Abstract Experiments on same-material granular tribocharging in bidisperse mixtures have demonstrated a clear size dependence in the polarity of charge on each species. These experiments typically involve charging via fluidization or shaking in air or similar environments, and frequently measure only overall polarity rather than individual grain charge. These experiments require discrete size species in each mixture, and may include additional environmental influences on the charging process that remain poorly understood. Using our methodology for charging in high vacuum and measuring individual grain charge, we have examined mixtures of zirconia-silica grains with two primary size species combined in varying quantities. We have explored the accuracy of a variety of charging models compared to the charge distributions observed in our experiments. Our experimental results will inform future theoretical models for the charge transfer mechanism in dielectric grains.

中文翻译：

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混合特性对同种材料介电颗粒尺寸相关充电的影响

摘要双分散混合物中相同材料颗粒摩擦带电的实验表明，每个物种的电荷极性具有明显的大小依赖性。这些实验通常涉及通过在空气或类似环境中流化或摇动来充电，并且经常仅测量整体极性而不是单个颗粒电荷。这些实验需要在每种混合物中使用离散尺寸的物质，并且可能包括对充电过程的额外环境影响，而这些影响仍然知之甚少。使用我们在高真空下充电和测量单个颗粒电荷的方法，我们检查了氧化锆-二氧化硅颗粒与两种不同数量组合的主要尺寸物质的混合物。与实验中观察到的电荷分布相比，我们探索了各种充电模型的准确性。