Complete characterization of local thermal transfer in high quality CVD diamond
- Room temperature microscopic thermal transfer in a high quality chemical vapor deposited diamond sample is completely characterized with micrometer resolution. A thermoreflectance microscope measures thermal conductivity and its slight variations inside a grain. Measurements reveal an inhomogeneous conductivity distribution with highest values close to that of natural IIa diamond. Using the same microscope, frequency dependent investigations of thermal barriers located between diamond grains are performed. Thermal resistance is found to vary between 10−9 and 10−8 m2K/W. Frequency dependent measurements sensitive to three-dimensional heat flow and averaging over a variable number of grains yield an enormous decrease of thermal conductivity with decreasing modulation frequency. Taking the average of thermal conductivity inside the grains and an average value for the barrier height together …
Metadaten| Author: | Jürgen Hartmann |
|---|
| Parent Title (English): | AIP Conference Proceedings (463) |
|---|
| Document Type: | Conference Proceeding |
|---|
| Language: | English |
|---|
| Year of publication: | 1999 |
|---|
| Publishing Institution: | Hochschule für Angewandte Wissenschaften Würzburg-Schweinfurt |
|---|
| Release Date: | 2020/12/04 |
|---|
| First Page: | 295 |
|---|
| Last Page: | 299 |
|---|
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 536 Wärme |
|---|
