4.2 Article

Vapor Pressure and Evaporation Coefficient Measurements at Elevated Temperatures with a Knudsen Cell and a Quartz Crystal Microbalance: New Data for SiO

Journal

JOURNAL OF CHEMICAL AND ENGINEERING DATA
Volume 57, Issue 5, Pages 1594-1601

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/je300199a

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Funding

  1. Deutsche Forschungsgemeinschaft DFG [Schwerpunktprogramm 1385]

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In this work we describe an experimental setup to measure vapor pressures and evaporation coefficients with the Knudsen method at elevated temperatures (1100 K to 1800 K) with a quartz crystal microbalance and an electron beam evaporator. Details of the experimental setup are presented, and the theoretical basis to calculate the vapor pressure data from measured quantities is given. The results for the well-known vapor pressure of copper demonstrate the proper operation of the setup. For SiO, new results are presented. We confirmed the value for the SiO evaporation coefficient but derived a lower vapor pressure compared to existing literature data.

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