Environment-friendly glass fibres and preparation method thereof

Abstract

The invention discloses environment-friendly glass fibres. The environment-friendly glass fibres are prepared from the sludge in the Qiantang river drainage basin, aluminium oxide, calcium oxide, magnesium oxide, titanium dioxide, tungsten trioxide, yttrium oxide, cerium dioxide and lithium oxide in percentage by weight. A preparation method of the environment-friendly glass fibres comprises the following steps: drying, crushing and screening the sludge in the Qiantang river drainage basin first; then, mixing the sludge in the Qiantang river drainage basin and other components, and then, melting and preparing the mixture into vitreous humour at the temperature of 1,400 to 1,500 DEG C; finally, cooling the vitreous humour to 1,250 to 1,350 DEG C and drawing. According to the environment-friendly glass fibres, the sludge which is deposited or filtered in a tap water purifying process of a water supply plant in the Qiantang river drainage basin is taken as a main raw material, so that the pollution to the environment caused by chemical raw materials is reduced; meanwhile, the environment-friendly glass fibres can also help the water supply plant to treat deposited substance or filtered substance; high performance of the glass fibres is ensured, and meanwhile, the cost is reduced to the greatest extent; in addition, the used raw materials do not contain the compounds of boron and fluorine; the environment is not influenced by embedding the raw materials after the raw materials are wasted; the environment-friendly glass fibres have good industrial application value.

Description

technical field [0001] The invention relates to an environment-friendly glass fiber and a preparation method thereof, belonging to the technical field of material science. Background technique [0002] Glass fiber is a new type of inorganic non-metallic functional material and structural material, which has a series of characteristics such as high tensile strength, high elastic modulus, good impact resistance, good chemical stability, good fatigue resistance, and high temperature resistance. As a reinforcing material for composite materials, glass fiber was originally used in military fields such as aviation, aerospace and weapons. Equipment, building reinforcement, etc. have also been widely used. However, its molding temperature is high, and a variety of precious metal compound raw materials are used, which greatly increases the production cost and limits its commercialization process. [0003] At present, commercial glass fiber products mainly include: S glass fiber and...

AI Technical Summary

Problems solved by technology

At the same time adding TiO 2 , ZrO 2 , Li 2 O, Fe 2 o 3 , CaF 2 、Na 2 O and K 2 O, to improve the manufacturability of glass melting and fiber forming, improve the modulus, strength and chemical corrosion resistance of glass, the forming temperature of glass fiber is about 1280 ℃; although the glass fiber melting temperature and melting time, but its tensile strength is only 3600~3900MPa

In addition, China Taishan Fiberglass Co., Ltd. starts from raw materials and uses a series of low-cost raw materials such as silica sand, pyrophyllite, kaolin, alunite, quicklime, magnesium oxide and blast furnace slag to prepare a high-strength and high-modulus glass fiber. The melting temperature is 1470 ℃, and the drawing temperature is 1310 ℃; however, due to the cumbersome preparation process and the use of water quenching and quenching treatment, there is not enough time for the arrangement of bonds to reduce the strength of the glass fiber, and its fiber tensile strength is only 3100~3500 MPa