Method for measuring absolute value of thermal conductivity
US6497509B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Jun 8, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N25/4833
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring the absolute value of thermal conductivity of low thermal conducting solid materials is disclosed. Thermal conductivity and heat capacity of the sample are determined simultaneously in a single measurement with the prerequisite that these values are frequency independent. This method is realized on power-compensated differential scanning calorimeters without any modification in the measuring system. DSC is calibrated in a standard way for temperature and heat flow. The method uses temperature-time profiles consisting of one fast temperature jump of 0.5 to 2 K and an isotherm. The measuring time for each temperature is less than 1 min. As input parameters only sample thickness and contact area with the DSC furnace (or sample diameter if the sample is disk shaped) are needed together with sample mass. In addition to the sample thermal conductivity and heat capacity the effective thermal contact between sample and DSC furnace is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.