Boron-free low dielectric constant glass fiber using solid waste as raw material and preparation method thereof

Abstract

The invention discloses a boron-free low-dielectric-constant glass fiber with solid waste being raw material and a preparation method thereof. The glass fiber consists of 40-65 wt% of blast furnace slag, 35-45 wt% of silicon ash and 0-20 wt% of aluminium oxide. The low-dielectric-constant glass fiber is prepared by reasonably blending the three raw materials including the blast furnace slag, the silicon ash and a small quantity of the aluminium oxide through pre-treatment of the blast furnace slag. The preparation method is simple in processes. The glass fiber is excellent in dielectric properties. The preparation method is reasonable in technology parameters, is good in feasibility and is low in production cost. The blast furnace slag can be widely applied in production of low-dielectric-constant alumina silicate glass fibers.

Description

technical field [0001] The invention relates to a low dielectric constant glass fiber prepared by using blast furnace slag, silica fume and aluminum oxide, which can be used as a reinforcing material for printed circuit boards. Background technique [0002] In recent years, the rapid process of industrialization and urbanization has accelerated the generation of waste, occupying a large area of ​​waste landfill, and turning these industrial waste into useful products can solve this problem. Blast furnace slag is a by-product discharged from blast furnaces during the ironmaking process. In ironmaking production, in addition to adding iron ore, fuel and other raw materials to the blast furnace, it is also necessary to add a considerable amount of limestone and dolomite as flux and slagging agents. When the furnace temperature is as high as 1400-1600 ° C, the The flux reacts with iron ore at high temperature to produce iron and slag. Blast furnace slag is a fusible substance c...

AI Technical Summary

Problems solved by technology

In addition, some low dielectric constant glass fibers such as D glass and NE glass have lower dielectric constant, but the content of boron oxide is very high (up to 30wt%). In the process of glass fiber preparation, although boron oxide can play a role However, the volatilization of boron oxide during the melting process has very adverse effects on the production of glass fibers, such as affecting the uniformity of product components, damaging the furnace, polluting the environment and increasing production cost, etc., so it is extremely important to prepare environmentally friendly boron-free low dielectric constant glass fibers

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