When a material is heated in a vacuum at a steady heating rate, the weight of the material decreases. With the weight loss caused by vaporing and the change of temperatuure, thermogravimetric curve is obtained and then able to calculate saturated vapor pressure and evaporation rate.
weight change・saturated vapor pressure・evaporation rate (molecular weight is known)
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature〜1000℃ | vacuum | φ4mm x height 4mm or φ7.5mm x height 8mm |
Saturated vapor pressure analysis by extrapolation
Analysis by extrapolation is possible for the saturated vapor pressure in the temperature range where weight loss is not confirmed.
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature〜1000℃ | – | – |
suitable for this measurement： Vapor Pressure Evaluation System VPE-9000
