COMPOSITION OF ELECTRONIC PURITY FIBERGLASS, AS WELL AS FIBERGLASS AND ELECTRONIC FABRIC MADE FROM IT Russian patent published in 2022 - IPC C03C13/00 

FIELD: electronic industry.

SUBSTANCE: invention relates to a composition of fiberglass for the bases of printed circuit boards for the electronic industry, as well as fiberglass and electronic fabric made from it. The proposed composition contains the following components, wt. %: 51.0-57.5 SiO₂, 11.0-17.0 Al₂O₃, more than 4.5 and less than or equal to 6.4 B₂O₃, 19.5-24.8 CaO, 0.1-1.0 MgO, 0.05-1.2 R₂O=Na₂O+K₂O+Li₂O, 0.05-0.8 Fe₂O₃, 0.01-1.0 TiO₂ and 0.01-1.0 F₂; at the same time, the range of the ratio of weight percentages C1=SiO₂/B₂O₃ is from 8.1 to 12.7, the range of the ratio of weight percentages C2=B₂O₃/(R₂O+MgO) is from 2.05 to 6.3 and the total weight percentage of the components listed above is greater than or equal to 99%. The proposed composition can reduce the cost and evaporation of raw materials. It can also improve the dielectric properties of glass, enhance the mechanical properties and water resistance of glass fiber, and improve the temperature range for fiber formation.

EFFECT: proposed composition is suitable for large-scale production in bath furnaces.

20 cl, 5 tbl, 9 ex