FIELD: electrical materials. SUBSTANCE: objective of invention is preparing material based on silica sol and volumetrically-reinforced woven materials based on silica or quartz fibers made for electric industry. Method of invention includes soaking of above-indicated fibers with 23-25+ACU- aqueous silica sol solution under evacuation during 0.5±0.08 h under evacuation during 0.5±0.08 h followed by stepped heat treatment including multiple dryings and final heat treatment. Drying temperature rises to 200 C passing through plateaus at 90±10 C and 200±10 C during 4±0.25 h, soaking-drying cycles being performed fivefold and final heat treatment being conducted for 8±0.25 h at temperature 600±10 C. EFFECT: improved strength and dielectric properties of material. 4 cl, 2 tbl
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