Preparation method of transparent silicon oxide aerogel block material

• Main Authors: ZHOU RUI, YANG ZHIGUO, GUO WEIJIANG, ZHAO YAOYAO
• Format: Patent
• Language: Chinese; English
• Published: 02.11.2021
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention discloses a preparation method of a transparent silicon oxide aerogel block material. The preparation method comprises the steps: adding a silicon source, a solvent, water and an acid catalyst into a reactor, uniformly stirring, hydrolyzing, adjusting the pH value of the hydrolysis solution by using a base catalyst, pouring the adjusted solution into a mold, and gelling to form a wet gel block; coating the surface of the aged gel block with silica sol; putting the coated gel block into a supercritical kettle for supercritical drying; and putting the gel block subjected to supercritical drying into a drying oven for baking, and cooling in a dryer to obtain the transparent silicon oxide aerogel block material. According to the aerogel block material prepared by the preparation method, the transparency of the aerogel block can be ensured while the aerogel block material is prevented from cracking, so that the prepared aerogel block material has the advantages of relatively high temperature resistan