High-temperature-resistant high-toughness nanowire aerogel material and preparation method thereof

• Main Authors: LI WENJING, LIU YUANYUAN, ZHANG HAO, ZHANG ENSHUANG, ZHANG WANLIN
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; COMPOUNDS THEREOF; CONCRETE; INORGANIC CHEMISTRY; LIME, MAGNESIA; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; REFRACTORIES; SLAG; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF NATURAL STONE

The invention relates to a high-temperature-resistant high-toughness nanowire aerogel material and a preparation method thereof.The method comprises the steps that aluminum oxide nanometer powder, boron nitride nanosheets and a sulfuric acid solution are evenly mixed with water, a mixed solution is obtained, then the mixed solution is placed at the temperature of 150-300 DEG C for a hydrothermal reaction for 12-18 h, and gel is obtained; the mass fraction of the aluminum oxide nano powder contained in the mixed solution is 5-20%, and the mass fraction of the boron nitride nanosheets contained in the mixed solution is 1-5%; the obtained gel is placed in a silica sol solution containing a catalyst to be soaked for 6-72 h, then the steps of aging, solvent replacement and supercritical drying are sequentially carried out, and the boron nitride doped nanowire aerogel material is obtained; the boron nitride doped nanowire aerogel material is subjected to heat treatment, and the high-temperature-resistant and high-t