A kind of superalloy thermoelectric material with high figure of merit and its preparation method
A technology of thermoelectric materials and high temperature alloys, which is applied in the directions of thermoelectric device junction lead-out materials and thermoelectric device manufacturing/processing, etc., can solve the problems of complex process flow, low raw material abundance, high cost, etc., and achieves a simple preparation process, Inexpensive, low-cost effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0039] A high-figure coefficient superalloy thermoelectric material with a general composition formula of 0.9Cu 0.5 Ni 0.5 0.1ZrO 2 .
[0040] Preparation method, the steps are as follows:
[0041] (1) Copper-nickel alloy Cu 0.5 Ni 0.5 The particles and zirconia fibers are mixed according to the molar ratio of 9:1 to obtain a preliminary mixture, and a polyvinyl alcohol solution with a mass concentration of 5% is added as a binder. Alcohol solution 0.1ml, mix well and grind for 1h;
[0042] (2) The mixture obtained after grinding is pressed into a disc in an abrasive tool, the applied pressure is 6Kpa, the diameter of the disc is 15mm, and the thickness is 8mm;
[0043] (3) The wafer obtained in step (2) is sintered in a tube furnace, and passed into H 2 / Ar mixed gas, where H 2 With a content of 5%, firstly heat from room temperature to 800°C at a rate of 5°C / min for 2 minutes; then heat at a rate of 1°C / min to 1100°C and keep at this temperature for 6 hours. After si...
Embodiment 2
[0054] A superalloy thermoelectric material with a high figure of merit coefficient, the general composition formula is 0.85Cu 0.5 Ni 0.5 0.15ZrO 2 .
[0055] Preparation method is the same as embodiment 1, and difference is: step (1) copper-nickel alloy Cu 0.5 Ni 0.5 The molar ratio of particles and zirconia fibers is 17:3.
[0056] The superalloy thermoelectric material of this embodiment, its XRD spectrum, as figure 1 shown. Seebeck coefficient and resistivity at different temperatures, such as figure 2 and image 3 shown. The power factor PF at different temperatures varies with temperature as Figure 4 shown.
[0057] The measured thermal conductivity, as Figure 5 shown. The variation of figure of merit ZT with temperature at different temperatures is as follows: Figure 6 shown.
[0058] The performance results of the copper-nickel alloy-based thermoelectric material prepared in Example 2 are shown in Table 2 below, and the detection method is the same as...
Embodiment 3
[0062] A high-figure coefficient superalloy thermoelectric material with a general composition formula of 0.8Cu 0.5 Ni 0.5 0.2ZrO 2 .
[0063] Preparation method is the same as embodiment 1, and difference is: step (1) copper-nickel alloy Cu 0.5 Ni 0.5 The molar ratio of microparticles and zirconia fibers is 4:1.
[0064] The superalloy thermoelectric material of this embodiment, its XRD spectrum, as figure 1 shown. Seebeck coefficient and resistivity at different temperatures, such as figure 2 and image 3 shown. The power factor PF at different temperatures varies with temperature as Figure 4 shown.
[0065] The measured thermal conductivity, as Figure 5 shown. The variation of figure of merit ZT with temperature at different temperatures is as follows: Figure 6 shown.
[0066] The performance results of the copper-nickel alloy-based thermoelectric material prepared in Example 3 are shown in Table 3 below, and the detection method is the same as in Example ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Seeback coefficient | aaaaa | aaaaa |
| electrical resistivity | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More