FIBERGLASS COMPOSITION WITH HIGH PERFORMANCE CHARACTERISTICS; FIBERGLASS AND COMPOSITION MATERIAL BASED ON IT Russian patent published in 2021 - IPC C03C3/95 C03C13/02 C03C14/00 

FIELD: fiberglass.

SUBSTANCE: invention provides a fiberglass composition, fiberglass and a composite material based on it. High performance fiberglass composition, characterized by the content of the following components, having a content expressed in percentages: SiO₂ from 57.4 to 61.4%, Al₂O₃ from 17.5 to 20.5%, MgO from 10.3 to 14% , Y₂O₃ from 2.9 to 4.3%, CaO from 2 to 6.4%, Li₂O + Na₂O + K₂O less than or equal to 1%, Li₂O less than or equal to 0.75%, TiO₂ less than 1.8%, Fe₂O₃ from 0.05 to 1.2%, CeO₂ from 0.05 to 0.55%, wherein the total mass percentage of the components listed above is at least 98%, and the mass percentage C1=Al₂O₃/SiO₂ is at least 0.293 and the mass percentage C2=(Al₂O₃+MgO+Li₂O)/Y₂O₃ is greater than or equal to 6.5 and less than or equal to 10.4.

EFFECT: composition can significantly increase the strength and elastic modulus of glass, effectively reduce the crystallization rate of glass, provide the desired temperature range (ΔT) for fiber formation, and improve the clarification of molten glass, thus making it particularly suitable for making high performance glass fibers in furnaces with refractory lining.

14 cl, 4 tbl