Preparation method of high-temperature-resisting aerogel material

An airgel and high-temperature-resistant technology, which is applied in the field of preparation of high-temperature-resistant airgel materials, can solve problems such as insufficient temperature resistance, potential safety hazards, and failure to consider material temperature resistance, so as to overcome shrinkage, inhibit sintering, The effect of inhibiting growth
CN108249901AActive Publication Date: 2018-07-06AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
Publication Date
2018-07-06

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Abstract

The invention relates to a preparation method of a high-temperature-resisting aerogel material. The method comprises the following steps: (1) preparing sol; (2) carrying out a nano-crystal assemblingprocess to prepare aerogel wet gel which takes an oxide nano-crystal as a framework; (3) preparing an aerogel material; (4) carrying out a heat treatment process to prepare the high-temperature-resisting aerogel material. According to the preparation method provided by the invention, a nano-crystal assembling technology and heat treatment are combined to prepare the high-temperature-resisting aerogel material with a microcosmic core-shell structure; the core-shell structure forms a network framework under high temprature so that the growth of the oxide nano-crystal is inhibited and the shrinkage problem caused by the fact that the structure of oxide aerogel collapses in a high-temperature utilization process is effectively solved. The aerogel material prepared by the preparation method hasa good high-temperature-resisting property; the heat-resisting temperature is 1000 DEG C or more and the high-temperature-resisting aerogel material even can bear the high temperature of 1300 DEG C or more.
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Description

technical field

[0001] The invention relates to the technical field of airgel preparation, in particular to a preparation method of a high-temperature-resistant airgel material. Background technique

[0002] Due to its high porosity and fine nanoporous network structure, airgel materials can effectively inhibit heat conduction and heat convection. It is considered to be the solid material with the best thermal insulation performance, and has been widely used in various spacecraft and aircraft. under heat protection. At present, there are many researches on silica airgel thermal insulation materials at home and abroad. It is a very effective material in the field of medium temperature insulation, but silica airgel has poor high temperature stability, and the long-term use temperature is not higher than 650°C. , so it is difficult to apply in a higher temperature environment. Therefore, seeking high-temperature-resistant airgel thermal insulation composite materials is the m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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