Composition for high-performance glass fiber

Abstract

The invention relates to a composition for high-performance glass fiber, which comprises 55 to 63 wt percent of SiO2, 23 to 26 wt percent of Al2O3, 11.5 to 14.5 wt percent of MgO, 0.5 to 2.5 wt percent of CeO2, 0 to 0.5 wt percent of LiO2, 0 to 1.5 wt percent of Bi2O3, 0 to 1.5 wt percent of WO3, and the balance of unavoidable impurities; the contents of the Li2O, the Bi2O and the WO3 can not be zero simultaneously. By adopting the composition as a raw material, the high-performance glass fiber can be produced by using a melting furnace and a fiber drawing furnace which are made from the existing fire resisting materials to perform melting and wire drawing. With reduced production difficulty and low cost, the composition has good producibility, is suitable for industrial continuous production and can save energy source, and the produced high-performance glass fiber can be used as the reinforcing material of a resin base composite material and has the advantages of high strength, corrosion resistance, high temperature resistance and light weight.

Description

technical field [0001] The invention relates to a composition for high-performance glass fibers. The glass fibers can be used in the field of advanced composite materials with high performance requirements such as high strength, high temperature resistance, and high acid resistance, and belong to the field of special glass fiber components. Background technique [0002] Glass fiber is an inorganic fiber material with excellent performance, and it can be used to reinforce resin to make composite materials with excellent performance. At present, more than 90% of the glass fibers used in various fields in the world are alkali-free glass fibers (E-glass). Shells, missile shells, light military weapons, aircraft components, wind power generation, advanced sporting goods and other high-performance composite materials are required. Therefore, since the 1960s, various countries have competed to develop high-strength glass fibers with various components. Their strength is about 3920...

AI Technical Summary

Problems solved by technology

Its composition is only composed of oxides of silicon, aluminum, and magnesium, and its content is SiO 2 : 65wt%, Al 2 o 3 : 25wt%, MgO: 10wt%, the glass fiber is characterized by high tensile strength (4600~4800MPa), but the glass forming temperature is relatively high, its liquidus temperature is 1471°C, and the drawing bushing temperature is as high as 1571°C, special It is difficult to carry out industrialized production in my country due to the harsh conditions of the wire drawing process and the high production cost.

British patent 1006524, its composition design is not reasonable enough, its Al 2 o 3 Not in the optimal close-packed state in glass, Li 2 The introduction of O is too large, which not only increases the cost, but also reduces the chemical stability. The composition design also introduces more toxic substances (Sb 2 o 3 ) as a clarifying agent, which not only affects human health, but also easily causes environmental pollution

Chinese patent application 94111349.3, in order to promote the clarification of the glass liquid in the composition design, a certain amount of Fe is added to the glass frit composition 2 o 3 , although it can play a clarifying role, but at the same time it brings problems such as poor heat permeability and poor melting performance of the glass. Fe 2 o 3 Excessive introduction will obviously color the glass fiber, affect the color of the glass fiber applied to the composite material, and affect the appearance of the composite material

In addition, excessive Fe 2 o 3 It is also easy to undergo a reduction reaction with the molybdenum electrode to form elemental Fe, which leads to poisoning accidents on the platinum leak board

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