High-temperature resistant aluminium oxide aerogel heat-proof composite material and method for making same
A technology of alumina aerogel and composite material, which is applied in the field of high temperature resistant alumina aerogel heat insulation composite material and its preparation, can solve the problems of high brittleness, low strength, poor ability to block infrared radiation, etc., and achieves a small pore size , high porosity, good barrier effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0016] The product of this embodiment is composed of aluminum silicate fiber felt and alumina airgel.
[0017] Preparation method: Mix aluminum sec-butoxide, absolute ethanol, and deionized water in a molar ratio of 1:16:0.6, heat to 60°C with a reflux device and stir for 45 minutes. The formed sol is colorless and transparent. When the sol drops to room temperature , adding methanol, deionized water and glacial acetic acid mixture to obtain alumina sol, wherein the molar ratio of methanol, deionized water and glacial acetic acid to aluminum sec-butoxide is 5: 0.168: 0.448: 1; The bulk density is 0.20g / cm 3 In the aluminum silicate fiber felt mold, make the two compound, gel after 1 hour, then add absolute ethanol to make it soak the sample, aging at room temperature for 2 days, put it into the autoclave, pre-filled with N 2 To 2MPa, heat up to 270°C at a rate of 1°C / min, keep the temperature constant for 1 hour, release the pressure slowly at a rate of 70KPa / min, after reach...
Embodiment 2
[0019] The product of this embodiment is composed of mullite fiber preform and alumina airgel doped with opacifying agent.
[0020] Preparation method: Mix aluminum isopropoxide, isopropanol, and deionized water in a molar ratio of 1:12:0.6, heat to 80°C with a reflux device and stir for 50 minutes. When the sol drops to room temperature, add methanol, deionized water, and Alumina sol was obtained from the oxalic acid mixture, wherein the molar ratio of methanol, deionized water, glacial acetic acid to aluminum sec-butoxide was 6:0.1:0.622:1. According to the ratio of alumina sol and opacifying agent of 100ml / lg, titanium dioxide was added and stirred for 10 minutes to disperse to obtain doped alumina sol. Set the bulk density to 0.18g / cm 3 The mullite fiber preform is mixed with alumina sol doped with titanium dioxide, gels after 0.5 hours, then isopropanol is added to soak the sample, aged at room temperature for 1 day, and then placed in an autoclave , pre-filled with 1.0...
Embodiment 3
[0022] The product of this embodiment is composed of aluminum silicate fiber felt and alumina airgel.
[0023] Preparation method: Mix aluminum nitrate, absolute ethanol, and deionized water at a molar ratio of 1:32:4, heat to 60°C with a reflux device and stir for 50 minutes, and when the sol drops to room temperature, add methanol, deionized water, and oxalic acid to mix Alumina sol was obtained from the solution, wherein the molar ratio of methanol, deionized water and oxalic acid to aluminum sec-butoxide was 8:0.25:0.448:1. Set the bulk density to 0.15g / cm 3 The aluminum silicate fiber felt is mixed with alumina sol, after 0.5 hours of gelation, absolute ethanol is added to make it soaked in the sample, aged at room temperature for 1.5 days, then put into an autoclave, pre-filled with N 2 to 0.5MPa, heat up to 270°C at a rate of 1°C / min, keep the temperature constant for 1 hour, release the pressure slowly at a rate of 100KPa / min, and then release the pressure with N 2 R...
PUM
Property | Measurement | Unit |
---|---|---|
Bulk density | aaaaa | aaaaa |
Thermal conductivity | aaaaa | aaaaa |
Thermal conductivity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com