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New Calcium Test to Determine Water Vapor Transmission Rates Based on Quartz Crystal Microbalance Measurements

机译:基于石英晶体微量天平测量结果确定水蒸气透过率的新钙测试

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Errors can occur when using the Ca test based on electrical resistivity or optical transmission to measure water vapor transmission rates (WVTRs). The changes in electrical resistivity or optical transmission may not be linear with oxidation because of the inhomogeneous oxidation of the Ca film. Recent results have shown that there is little change in electrical resistivity of Ca films until the later stages of Ca film oxidation. In response to these problems, we have developed a new Ca test based on quartz crystal microbalance (QCM) measurements. The QCM measures the mass gain that occurs as the Ca film oxidizes according to Ca + 2H_2O → Ca(OH)_2 + H_2. Recent results from our QCM method suggest that the lack of linearity for electrical and optical calcium tests results from the non-linear oxidation of the Ca film itself. This paper explores the use of the QCM mass-based Ca test as a probe for understanding the oxidation of Ca films.
机译:使用基于电阻率或光学透射率的Ca测试来测量水蒸气透过率(WVTR)时,可能会发生错误。由于Ca膜的氧化不均匀,电阻率或光透射率的变化可能与氧化呈线性关系。最近的结果表明,直到Ca膜氧化的后期,Ca膜的电阻率几乎没有变化。针对这些问题,我们开发了一种基于石英晶体微天平(QCM)测量的新型Ca测试。 QCM测量Ca膜根据Ca + 2H_2O→Ca(OH)_2 + H_2氧化时发生的质量增加。我们的QCM方法的最新结果表明,电和光学钙测试缺乏线性是由于Ca膜本身的非线性氧化所致。本文探讨了使用基于QCM质量的Ca测试作为了解Ca膜氧化的探针。

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