Analysis of thermal conductivity・thermal diffusivity
Accurate measurement of each sample and measurement direction is available with meeting various needs in sample size from bulk to 20nm-thin film.
Quick reference matrix
Measurement temperature
Thermal conductivity of various materials
laser flash method
measure thermal diffusivity of a sample from temperature response on the backside of the sample after laser-pulse-heating the front side of the sample.
thermal conductivity
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature | air vacuum inert gas |
φ10mm～square 7㎜ thickness 1㎜～3㎜ *Consult us about thickness. |
| 50℃～1000℃ | vacuum innert gas |
thermal diffusivity
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature | air vacuum inert gas |
φ10mm～square 7㎜ thickness 1㎜～3㎜ *Consult us about thickness. |
| 50℃～1200℃ | vacuum innert gas |
|
| – | – | powder sample |
two dimensions method (thermal diffusivity)
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature | air | square 25～30㎜ length 0.1～1㎜ *Consult us about thickness. |
multi-layer analysis (thermal diffusivity)
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| ー | ー | 2 layers or 3 layers |
suitable for this measurement : Laser Flash Method Thermal Constant Measurement System TC-1200RH
Xe flash method
Xe flash method is used to measure thermal diffusivity of a sample from temperture rise on the backside of the sample after xenon-pulse-heating the front side of the sample.
thermal diffusivity
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature | air inert gas |
φ10、20mm、square 10㎜ thickness 0.1～2㎜ *Consult us about shape. |
| 50℃～300℃ | in inert gas |
multi-layer analysis (thermal diffusivity)
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| ー | ー | 2 layers or 3 layers |
suitable for this measurement：Thermal diffusivity Measurement System by Xe flash method TD-1 series
scanning laser heating AC method
Scanning laser heating AC method / Apply a band of laser to the surface of a thin film sample periodically and then evaluate the thermal diffusivity of the sample in-plane direction.
thermal diffusivity (in-plane direction)
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature | vacuum air |
self-standing thin sheet W2.5～4mm x L30mm thickness 10 ～300μm |
| air | self-standing thin sheet W2.5～4mm x L30mm thickness 10 ～50μm” |
Calculation result of thermal conductivity (with the known data of specific heat and density)
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature | vacuum | not self-standing thin film thickness100～1000nm * glass substrate will be provided. |
suitable for this measurement：AC Method Thermal Diffusivity Measurement System LaserPIT
periodic heating method
Apply periodic heating to a sample and then evaluate the thermal diffusivity of the sample from the temperature behaviour caused by periodic temperature change.
thermal diffusivity(in the thickness direction)
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| room temperature | vacuum | width10mm x length 10mm or more thickness 10～300μm * Consult us about shape and thickness. |
suitable for this measurement：Periodical Heating Method Thermal Diffusivity Measurement System FTC series
steady method
keep steady temperature gradient on a sample by applying higher temperature at one end of the sample and lower temperature at the other end and then calculate thermal conductivity after measuring the temperature.
thermal conductivity
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| 50℃〜280℃ | air | self-standing thin film square 25mm thickness 2～8mm |
| 50℃〜200℃ | film square 25mm thickness 100～1000μm |
suitable for this measurement：Steady Method Thermal Conductivity Measurement System GH-1 series
2 omega method
By detecting thermal amplitude with thermo-reflectance method, thermal conductivity of an insulating film on the substrate can be measured in thickness direction.
thermal conductivity
| temperature range | atmosphere | sample size, shape |
|---|---|---|
| 26℃ | vacuum | width10mm x length 20mm thickness 20～1000nm substrate thickness 0.5～1㎜ * Consult us about material and thickness. |
suitable for this measurement：2-Omega Method Nano Thin Film Thermal Conductivity Meter TCN-2ω