The Thermal Resistance (m²K/W) and Thermal Conductivity (W/m·K) of Copy Paper (89 µm) and Airloy ® X116 (400 µm, aerogel film) samples were measured using the MP-1 Transient Plane Source (TPS) method: Proprietary Transient Thermal Resistance (TTR) – Thin-Film Module.
Figure 1. MP-1 TPS for testing at room temperature with TTR-TF Stand.
The MP-1 TPS with TTR-TF Module allows for the measurement of thermal resistance & thermal conductivity of films, adhesives, pastes, and coatings (up ~ 1 mm thick).
Figure 2. Room temperature set-up of TTR Module sample and sensor assembly.
Figure 3. Airloy® X116 Flexible Thin Film samples (left) and Copy Paper samples (right).
A sensor with 20 mm diameter is used for TTR-TF tests, along with four pieces of steel 21 mm in diameter. Two of the pieces have length l1 = 3 mm, and the other two pieces have length l2 = 25 mm. Two pieces of copy paper and Airloy® X116 were cut into circles of diameter 21 mm. The thin film sample goes in between pieces l1 and l2 (no contact agent is needed due to the insulative properties of the samples). This testing may also be done in asymmetric configuration.
| Sample | Film Thickness (µm) |
Thermal Resistance 10-3 (m²K/W) |
| Copy Paper | 89 | 1.22 |
| Airloy ® X116 | 400 | 14.98 |
9.9 mm radius (4617-1), 5 sec. 1 W, 23°C, n=5.
| Sample | Thermal Conductivity (W/mK) |
| Copy Paper | 0.073 |
| Airloy ® X116 | 0.029 |
9.9 mm radius (4617-1), 5 sec. 1 W, 23°C, n=5.
When comparing the measured and supplier value:
Copy Paper Range: 0.07 to 0.085 W/m·K
1Airloy® X116: 0.029 W/m·K by ASTM C177
The MP-1 with TPS TTR-TF Module demonstrates good agreement with known and measured values for thin-insulative materials.
Reference:
1http://www.buyaerogel.com/product/airloy-x116-thin-films/