Glass fiber, preparation method thereof and glass fiber composite material

Abstract

The invention discloses a glass fiber, a preparation method thereof and a glass fiber composite material. The nominal diameter of the glass fiber ranges from 3 micro to 15 micro and the deviation value of the diameter of the glass fiber is within + / -15% of the nominal diameter. According to the weight percent, in the glass fiber, the alumina content is 20-33%, the silicon oxide content is 4.11-5.48 times of calcium oxide and the calcium oxide content is 0.9-2.1 times of magnesium oxide. Under the condition of high alumina content (20-33% or 23-33% or 25-33%), the glass fiber can generate a new product property with the function of dispersion of aluminum, silicon, calcium and magnesium, so that the problem in the prior art that the dissolving and the quality of air bubbles cannot be controlled resulting from high glass viscosity as a result of high aluminum content is solved; energy and consumption are greatly reduced; the carbon emission is lowered; the devitrification temperature is low, so that mass production can be carried out; and besides, pollutant discharge of toxic boron gas is not generated in the production process.

Description

technical field [0001] The invention relates to glass fiber and its preparation method. The glass fiber has the characteristics of low crystallization temperature, high strength and low viscosity. The glass fibers can be used to make glass fiber composites. Background technique [0002] Existing glass fibers and glass fiber composite products all have some defects: [0003] 1. High and medium-alkali glass fiber: by weight percentage, its composition contains about 67% silicon oxide, about 1% magnesium oxide, about 9.5% calcium oxide, about 5-7% aluminum oxide, and about 2-2% sodium oxide 10%, fluorine oxide about 0.5%, boron oxide about 3%, barium oxide about 2%. The defect of its products is that the viscosity in the production process is high, and the production energy consumption is large; when the diameter of the glass fiber is less than or equal to 9 microns, the breaking strength (N / tex) is poor, generally below 0.4, so the technical effect is poor, and it is difficu...

AI Technical Summary

Problems solved by technology

[0023] 9. Especially for wind blade materials in glass fiber composite materials, due to the low strength of glass fibers used, or the high cost and low output of S-grade glass fibers, the sweeping area of ​​wind blades cannot be increased, which seriously restricts The conversion of wind energy to electric energy restricts the cost of wind power generation, which is much higher than that of thermal power and hydropower.

Images