Preparation method for extruding 3D printing silicon-aluminum oxide ceramic aerogel

Abstract

The invention discloses a preparation method for extruding 3D printing silicon-aluminum oxide ceramic aerogel, and aims to realize additive manufacturing of the aluminum oxide ceramic aerogel and meet the performance requirements of low density, low heat conductivity and high temperature resistance of the silicon-aluminum oxide ceramic aerogel, silicon-aluminum oxide ceramic ink can realize controllable thermocuring by means of temperature induction, and the performance of the silicon-aluminum oxide ceramic aerogel is improved. The 3D printing silicon-aluminum oxide ceramic aerogel with high structural integrity and high shape fidelity is obtained. According to the technical scheme, the preparation method comprises the following steps: preparing thermocurable silicon-aluminum oxide ceramic ink, 3D printing silicon-aluminum oxide ceramic ink, carrying out temperature-controlled thermocuring, carrying out supercritical drying, and carrying out high-temperature heat treatment, so as to obtain the 3D printing silicon-aluminum oxide ceramic aerogel. By adopting the preparation method disclosed by the invention, controllable thermocuring of the silicon-aluminum oxide ceramic ink can be realized, 3D printing silicon-aluminum oxide ceramic with low density, low thermal conductivity, high temperature resistance, high structural integrity and high shape fidelity is obtained, and the aerogel can keep a hollow porous structure after being calcined at 1100 DEG C.

Description

technical field [0001] The invention relates to the technical field of additively manufactured ceramic airgel, in particular to a preparation method for extruding 3D printed silicon-aluminum oxide ceramic airgel. Background technique [0002] Ceramic aerogels have high porosity, large surface area, low density, low thermal conductivity, and excellent thermal oxidation resistance, and are widely used in thermal / acoustic / electrical insulation, catalyst supports, filters, and energy storage materials. However, ceramic aerogels have inherent brittleness problems, and it is difficult to endow ceramic aerogels with complex structures and shapes by relying on traditional subtractive manufacturing processes such as turning, milling, planing, and grinding. Compared with the subtractive manufacturing process, additive manufacturing (also known as three-dimensional printing, 3D printing) provides new ideas and new solutions for the custom molding and complex structure design of ceramic...

AI Technical Summary

Problems solved by technology

[0006] In summary, silicon-aluminum oxide ceramic airgel has excellent high-temperature resistance and is an ideal material for high-temperature heat insulation. The existing 3D printing method of silicon oxide airgel is difficult to apply to the air condensation of silicon-aluminum oxide ceramics. At the same time, the method of preparing silicon-aluminum oxide ceramic airgel by means of extrusion 3D printing technology has not been reported yet.

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