| Datensatz noch nicht abgeschlossen | |
| Zugriffsnummer | 45407 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | The thermal conductivity of dialkylphthalates |
| Autor(in); Institution |
Poltz, H.; PTB-Braunschweig
|
| Quelle/Jahr | Wärme- und Stoffübertragung: 3 (1970), 247 - 250 |
| ISSN | 0042-9929 (PRINT) ; 1432-1181 (ONLINE) |
| DOI | |
| Verlag | Berlin: Springer |
| Freie Schlagworte | Thermal conductivity ; Heat flux ; Elevated temperature ; Reference material ; Apply physic |
| Zusammenfassung | The thermal conductivity of liquids poorly absorbing heat radiation depends considerably on the thickness of the sample in the direction of heat flux. This arises from the radiative component of thermal conductivity which shows a size effect just for such sample sizes which are mostly chosen for experimental reasons. Therefore, only values of strongly absorbing liquids should be selected for reference purposes because the radiative term is much smaller in such liquids. This is important in particular at elevated temperatures because the radiative component increases very considerably with temperature. In the range from about 0 °C to 300 °C dialkylphthalates seem to be suitable reference materials. As a first contribution to the problem of obtaining appropriate standard reference data the thermal conductivity of six compounds of this type was measured between + 10 °C and 85 °C. The measurements show that the size effect is not larger for these compounds than for alcohols. |
