Low-cost micro-processing method for ultralight and fragile aerogel

Abstract

The invention discloses a low-cost micro-processing method for ultralight and fragile aerogel. The method specifically comprises the steps of 1, cutting a flexible plastic foam board into an equilateral triangle plastic foam board, and forming a circular hole in the center of the equilateral triangle plastic foam board; 2, placing the aerogel to be processed into the circular hole in the equilateral triangle plastic foam board processed in the step 1; and 3, placing the plastic foam board wrapped with the aerogel in the step 2 in a triangle chuck of a micro milling machine displacement platform, properly clamping the plastic foam board through the triangle chuck to prevent the aerogel from shaking in the circular hole of the plastic foam board, and milling the aerogel. According to the method, the thermal effect generated in the processing process and the influence of vibration on the aerogel structure can be avoided, and high-precision processing is realized.

Description

technical field [0001] The invention belongs to the technical field of material processing and molding, and relates to a low-cost micro-processing method for ultra-friable airgel. Background technique [0002] Airgel is a kind of nanoporous material with multi-level fractal structure, which has ultra-low density, ultra-low mechanical modulus, ultra-low thermal conductivity, ultra-low refractive index, ultra-high specific surface area and ultra-high Porosity and other characteristics have important application value in the fields of national defense, aerospace exploration, energy conservation and environmental protection, and basic physics research, especially in the capture of high-speed particles in space, thermal protection of temperature-sensitive components of Mars landing equipment, thermal insulation of missile thermal batteries, Supercapacitors and lithium-ion batteries, 3 It has very important applications in cutting-edge and popular researches such as He superfluid...

AI Technical Summary

Problems solved by technology

Using ordinary tools, electric drills, grinders and other hand-held tools for manual processing can easily lead to airgel fragmentation and damage, and the processing accuracy is difficult to guarantee

Although ultra-precision machining methods such as single-point diamond lathes can obtain extremely high machining accuracy, the cost of related equipment is high (the price of a single unit may exceed one million U.S. dollars), resulting in extremely high processing costs and a long processing cycle (single piece Processing cycle ~ several hours to several days), only small-sized samples can be processed, which is not conducive to batch processing of airgel

For laser ablation processing, the thermal effect generated by the instant interaction between laser and matter is used to ablate the material. Although this method can avoid stress damage to airgel, due to the extremely high specific surface area of ​​airgel, laser processing is difficult. The high temperature generated is very easy to ignite the gas gel. In addition, due to the high energy of the laser used, it is easy to cause damage to human eyes if it is improperly operated during the operation. The processing usually needs to be completed in a clean room, and the cost of laser processing equipment is very high, the processing cost is also extremely high, and the size of the processed sample is also extremely limited, so it is not widely used in the processing of airgel

3D printing is a new type of material forming and processing method that has emerged in recent years. The use of 3D printing technology to process airgel is still immature, and the printing equipment is expensive, the ink formula is single, and the processing technology is complicated. Microfabrication and plasticity of airgel

[0004] In summary, there are many disadvantages in manual processing, ultra-precision machining, laser ablation processing and 3D printing, and the lack of low-cost, high-precision and easy-to-operate airgel micromachining technology is still scarce, which seriously restricts the development of airgel. Glue application and promotion

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