A thermal cycle high-efficiency phase change heat storage material and its preparation method
A phase-change heat storage and high-efficiency technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as difficulty in meeting dispersion requirements, adhesion of microcapsules, and need to strengthen heat resistance cycles, etc., to achieve easy Effect of controlling, avoiding loss, and increasing the number of cycles
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0023] On the one hand, the present invention provides a method for preparing a heat cycle high-efficiency phase-change thermal storage material, comprising the following steps:
[0024] Mix aluminum-silicon alloy powder, nano-calcium oxide powder, nano-silicon oxide powder, and nano-alumina powder with a solvent to make a mixed slurry; filter the mixed slurry, dry it, and then make it more than 90% Calcining for 3-6 hours under the condition of humidity air atmosphere and 600-850 DEG C, and cooling to room temperature to obtain a thermal cycle high-efficiency phase-change thermal storage material.
[0025] Preferably, the aluminum-silicon alloy powder, nano-calcium oxide powder, nano-silicon oxide powder and solvent are mixed according to the following weight ratio: 40-60% of the aluminum-silicon alloy powder, 5-20% of the nano-calcium oxide powder %, 0.5-3% of nano-silica powder, 0.5-2% of nano-alumina powder, and 30-40% of solvent.
[0026] The nano-calcium oxide powder us...
Embodiment 1
[0035] According to the following weight ratio, mix aluminum-silicon alloy powder, nano-calcium oxide powder, nano-silicon oxide powder and ethanol with a concentration of 93% at a constant temperature of 25°C for 25 minutes to obtain a mixed slurry: aluminum-silicon alloy powder 40% of calcium oxide powder, 20% of nano-calcium oxide powder, 2% of nano-silica powder, 2% of nano-alumina powder, and 36% of ethanol.
[0036] Filter the mixed slurry, dry it to constant weight, put it into a corundum crucible and place it in a muffle furnace, bake it in an air atmosphere with a humidity of 95% and 600°C for 6 hours, and cool it to room temperature to obtain a high thermal cycle efficiency. Phase change thermal storage materials.
[0037] The heat cycle high-efficiency phase change heat storage material prepared in this example was subjected to 5000 heat cycles at 650° C., and the phase change latent heat retention rate was 92%.
Embodiment 2
[0039] According to the following weight ratio, mix the aluminum-silicon alloy powder, nano-calcium oxide powder, nano-silicon oxide powder and ethanol with a concentration of 95% at a constant temperature of 30°C for 20 minutes to obtain a mixed slurry: aluminum-silicon alloy powder 45% of calcium oxide powder, 15% of nano calcium oxide powder, 1.5% of nano silicon oxide powder, 1.5% of nano alumina powder, and 37% of ethanol.
[0040] Filter the mixed slurry, dry it to constant weight, put it into a corundum crucible and place it in a muffle furnace, bake it in an air atmosphere with a humidity of 95% and 650°C for 5 hours, and cool it to room temperature to obtain a high thermal cycle efficiency. Phase change thermal storage materials.
[0041] The heat cycle high-efficiency phase change heat storage material prepared in this example was subjected to 5000 heat cycles at 650° C., and the phase change latent heat retention rate was 93%.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More