Hot Disk thermal constants analyzer

Thermal conductivity data [26] was obtained using the Hot Disk thermal constants analyzer, using the following parameters measurement depth 6 mm, room temperature 25 °C, power 0.025 W, measurement time 16 s, sensor radius 2.001 mm, TCR 0.0471 K , disk type kapton, temperature drift rec yes. The diagram is shown in Figure 19.3. 

Figure 19.3 Hot Disk thermal constants analyzer (a) sensor (b) equipment diagram. (Reproduced with kind permission from NLGI. Copyright (2010) NLGI)...

Thermal conductivity of the obtained aerogel glass materials was emalyzed by using a Hot Disk Thermal Constants Analyzer (Model TPS 2500S). A disk-type Kapton Sensor 5465 with radius 3.189 mm was used. The temperatrrre increase of the samples as a function of time was recorded to compute the thermal conductivity. The fined thermal conductivity value reported here was the arithmetic mean of three individual measurements trader different measurement conditions (heating power 5-20 mW, measurement time 5 0 s). 

In this section, the differences between using CVD hybrid fillers and physically mixed hybrid fillers in polymer composites were studied. It shows an interesting result with regard to the thermal and hardness properties of composites. The synergistic effects of two components in the hybrid fillers helped each other perform as fillers and reinforcements in polymer composites. The thermal conductivities and hardnesses of phenolic/CNT—alumina hybrid composites were studied. The CNT—alumina hybrid (HYB compound) was produced via the CVD method, which was discussed in Section 5.6. The phenolic/CNT—alumina hybrid composites were fabricated using hot-mounted molding. Thermal conductivity was measured using the transient plane source method with a Hot-Disk Thermal Constant Analyzer. Table 5.4 shows the sample description in this study. 

The Mathis Instruments Hot Disk Thermal Constants Analyzer is an emerging technology that can measme the in-plane and through-plane TC of an anisotropic material in the same test, using the transient plane source technique [13-17]. The saisor used in this test method is a 10 micron thick nickel foil embedded between two 25.4 micron thick layas of Kapton polyimide film. The nickel foil is wound in a double spir pattern with a radius of 3.189 mm. The thomal eonductivities were measmed at 23"C. 

Hot Disk Thermal Constants Analyzer Instruction Manual, Mathis Instruments, Ltd., Fredericton, New Brunswick, Canada (2001). 

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