The project goals are to (1) assess the quality of existing vapor pressure data of compounds such as Hf [(CH3)2N]4 (acronym TDMAH), (2) fill gaps in the existing data by developing apparatus capable of accurate vapor pressure measurements, (3) provide the resulting accurate data to industry, and (4) investigate alternate methods to measure vapor pressure that are suitably accurate yet more convenient than existing methods.
To measure vapor pressure, the laboratory apparatus uses pressure gauges that operate at the same temperature as the sample. This direct method was chosen over indirect methods that rely on, for example, thermogravimetric analysis or nuclear magnetic resonance. Challenges include achieving appropriate control of the sample temperature, handling hazardous samples, and avoiding systematic errors due to the presence of decomposition products, dissolved gases, and other impurities. To measure thermal stability, a gas chromatograph/mass spectrometer is incorporated into the apparatus.
Lead Organizational Unit:pml
Manufacturers and users of vapor delivery equipment.
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