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[Measurement Example] <Insulation substrate material for electronic circuits> Thermal conductivity of polyimide sheet

[Measurement Example] <Insulation substrate material for electronic circuits> Thermal conductivity of polyimide sheet

Thermal conductivity distribution measurement and the anisotropy of thermal diffusivity in each part can be evaluated.

Here is an example of evaluating thin polyimide sheets. Polyimide sheets are resin materials primarily used as insulating substrates and insulating layers in electronic circuits. This time, we measured the thermal diffusivity in the thickness direction using a ThermoWave Analyzer TA on a sheet with a thickness of 7.5 μm. Even with the same polyimide sheet, there are significant thermal differences depending on the thickness. When comparing examples of 25 μm and 7.5 μm using the measure of thermal diffusion time, there is nearly a tenfold difference. The thinner sheet diffuses heat in one-tenth the time. For in-plane measurements, it is relatively easy to achieve time resolution since the distance between the heating point and the detection point can be established. However, for thickness direction measurements, it is necessary to detect rapid temperature changes, which affects the basic performance of the equipment. Traditional measurement methods make the measurement itself difficult. Additionally, at a thickness of 7.5 μm, the thermal effects of surface blackening treatment cannot be ignored, so we have devised methods to minimize these effects during sample preparation and measurement. The measurement results are as follows: Thermal diffusivity in the thickness direction: 0.103 × 10^-6 m²s^-1. This value is approximately 30% lower compared to the 25 μm thick polyimide.

  • Other physicochemical equipment

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[Measurement Example] <Fuel Cell Materials> Thermal Conductivity of Zirconia

[Measurement Example] <Fuel Cell Materials> Thermal Conductivity of Zirconia

Thermal conductivity can be measured non-contact! No surface treatment is required for carbon-based materials!

Yttria-stabilized zirconia is "an oxide based on zirconia, with the addition of yttrium oxide, which stabilizes the crystal structure of zirconia at room temperature." Applications include refractory materials, electrically conductive ceramics, materials for solid oxide fuel cell (SOFC) products, and due to its hardness and optical properties in single crystals, it is also used as a gemstone, such as cubic zirconia. In the case of fuel cell materials, thermal properties are important because the operating temperatures are high. Additionally, cubic zirconia closely resembles diamond and is often used as a diamond substitute. Like diamonds, it has a high refractive index, which gives it a sparkling appearance. The main difference lies in thermal conductivity. There are devices that can simply assess thermal properties to distinguish between diamond and zirconia. It seems that it is also used in thermal barrier coatings (TBC) for gas turbines. The measured result for thermal diffusivity was 1.13×10^-6 m^2s^-1. This value is 2 to 3 orders of magnitude lower compared to diamond. Our ThermoWave Analyzer TA allows for non-contact measurements. Many carbon-based materials can be measured without the need for surface treatment.

  • Other physicochemical equipment

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[Technical Data] Case Study on Thermal Conductivity Measurement of Thermal Interface Materials

[Technical Data] Case Study on Thermal Conductivity Measurement of Thermal Interface Materials

Measuring thermal pads! Covering anisotropy, mapping, and comparisons of measurement methods.

In this document, we introduce "Measurement examples of thermal interface materials using a thermo-wave analyzer." We measure thermal pads, a type of thermal interface material. The measurement covers anisotropy, mapping, and comparisons with other measurement methods. Please feel free to download and take a look. 【Contents】 ■ Introduction ■ Measurement Samples ■ Measurement Results ■ Conclusion ■ References *For more details, please refer to the PDF document or feel free to contact us.

  • Logic Analyzer

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