Abstract

An automated instrument to measure specific surface area (SSA) of powdered materials was designed using the Brunauer–Emmett–Teller (BET) isotherm method. A sample of known SSA was introduced to make the method simple, accurate, and fast. The cost of the instrument was reduced by operating the instrument at a fixed partial pressure. A piezoelectric sensor was introduced to detect the changes in gas flow rates with better sensitivity and low cost. The analyzer was used to analyze the SSA of an unknown sample, to compare the SSA of two samples, and to identify unknowns using the SSA. The error of the instrument was less than 0.1%.

中文翻译：

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用于通过 Brunauer-Emmett-Teller (BET) 方法测量粉末比表面积的低成本自动化仪器

摘要

使用 Brunauer-Emmett-Teller (BET) 等温线方法设计了一种用于测量粉末材料比表面积 (SSA) 的自动化仪器。引入了已知 SSA 的样品以使该方法简单、准确和快速。通过在固定分压下操作仪器降低了仪器的成本。引入压电传感器以更好的灵敏度和低成本检测气体流速的变化。该分析仪用于分析未知样品的 SSA，比较两个样品的 SSA，并使用 SSA 识别未知物。仪器误差小于0.1%。