Measurement of thermal conductivity of conductive diamond
Request measurement
Even thin and small samples, as well as samples with high thermal conductivity, can be measured!
We are also able to measure the thermal conductivity of conductive diamonds. Normally, diamonds are insulators, but by doping with boron, they can be made conductive, allowing for the creation of high-performance electrodes. This enables redox reactions that are impossible with electrodes made from other materials due to a wide potential window, and they can be used in harsh environments such as strong acids and strong alkalis, offering significant advantages. Personally, I am particularly interested in their potential use in the recycling of CFRP. The measurements will be conducted using the ThermoWave Analyzer TA35. [About the Samples] The samples this time have thicknesses of 30μm and 300μm, and with a sample size of 10mm x 10mm, it can be said that measurement with ordinary thermal conductivity measurement devices is nearly impossible. Measurement is only possible with the ThermoWave Analyzer. The 30μm thick sample is matte black with a smooth surface. The 300μm thick sample is also matte black, but its surface was slightly rough. However, this level of roughness has no effect on the measurements at all.
Inquire About This Product
basic information
[Measurement of Thermal Diffusivity] Both samples are black, and there is no need for blackening with carbon spray. By the way, carbon spray is applied to absorb laser light on the surface and enhance infrared radiation from the backside. Additionally, the physical property value obtained from the thermo-wave analyzer is the thermal diffusivity (for small samples, materials with good thermal conductivity cannot have their thermal conductivity directly measured). Thermal diffusivity can be converted to thermal conductivity from specific heat and density. Carbon-based materials have significant temperature dependence, and when the sample temperature rises due to the heat from the laser irradiation, the thermal conductivity changes. This time, since we want to measure the thermal conductivity near room temperature, we will conduct measurements while varying the laser intensity, plotting laser intensity on the horizontal axis and thermal diffusivity on the vertical axis. By extrapolating to zero laser intensity, we can determine the thermal diffusivity excluding the effects of temperature rise due to the laser.
Price information
For details, please refer to the price list below.
Price range
P3
Delivery Time
P4
※We will report back in about two weeks.
Applications/Examples of results
【Measurement Results】 t=30μm Conductive Diamond Thermal diffusivity: 78.2×10^-6 m²/s Thermal conductivity: 143 W/mK (Calculated from literature values of specific heat and density) t=300μm Conductive Diamond Thermal diffusivity: 122.2×10^-6 m²/s Thermal conductivity: 223 W/mK (Calculated from literature values of specific heat and density) The obtained thermal conductivity was close to that of metals. The thermal conductivity as a material is relatively high, and I believe that it can be expected to have a heat dissipation capability comparable to metals for components that require heat dissipation. By understanding the thermal conductivity of the material, foundational data for use in various environments can be obtained. Particularly in this case, since the samples are small and thin, understanding the thermal conductivity is not easy, but accurate thermal conductivity was measured non-destructively using a thermo-wave analyzer. 【Reference: Thermal Conductivity of Metals】 Copper: 401 W/mK Aluminum: 237 W/mK Magnesium: 156 W/mK Iron: 80 W/mK
catalog（2）
Download All Catalogs
News about this product（6）
Company information
Leveraging the assembly technology cultivated over many years, we have expanded our business areas to include the development of precision component assembly, thermal property measurement devices, contract measurement services, and the development of medical and dental plastic products equipped with clean rooms. We deepen and integrate our "original products" from a unique manufacturing perspective, consolidating our know-how and technology. With "speedy decision-making and execution," which is a strength unique to Bethel, we provide high-quality products under the "Made by BETHEL" label. Our wish at Bethel is for our customers who use Bethel products to be satisfied with our products, manufacturing, and services, and to feel that they made the right choice in trusting our company. Furthermore, we hope that the satisfaction of our customers will lead to the happiness of each employee who works here.