A low thermal expansion coefficient high modulus glass fiber

Abstract

The invention discloses a glass fiber with low thermal expansion coefficient and high modulus, which belongs to the technical field of glass fiber. The glass fibers of the present invention consist of the following components: SiO 2 55.0~63.0%, Al 2 o 3 17.5~25.0%, MgO 6.0~14.5%, B 2 o 3 1.0~6.0%, Y 2 o 3 1.0~6.0%, ZnO 0.1~4.5%, TiO 2 0.1~4.0%, ZrO 2 0.1~3.0%,H f o 2 0.1~2.0%, Li 2 O 0.1~2.0%; of which TiO 2 , ZrO 2 、H f o 2 The sum of the contents is 1.0-5.0%. The glass fiber of the present invention does not add CaO, K 2 O, Na 2 O component, add B at the same time 2 o 3 , Y 2 o 3 , ZnO, TiO 2 , ZrO 2 、H f o 2 And optimizing the ratio of each element significantly reduces the expansion coefficient of the glass fiber of the present invention, and at the same time significantly increases the elastic modulus of the glass fiber. Adding the expansion coefficient of the glass fiber of the present invention is as low as 2.8×10 ‑6 / °C. While ensuring a low expansion coefficient, the glass fiber of the present invention has an elastic modulus as high as 97GPa or more, and is suitable for the requirements of high-precision components.

Description

Technical field [0001] The present invention relates to the field of glass fibers, and in particular, to a high-equivalent glass fiber having a low thermal expansion coefficient. Background technique [0002] In a common glass fiber series, the S-series glass expansion coefficient is about 4.0 × 10 -6 / ° C, the elastic modulus is around 92 GPA; the elastic modulus can be, but the coefficient of thermal expansion is too high. The expansion coefficient of T glass is low (about 3.4 × 10 -6 / ° C), but T glass SiO 2 Alone 2 O 3 The content is very high (≥ 89%), resulting in a temperature of the T-glass 1000 molecules exceeding 1460 ° C, and the temperature difference of 1000 mooring is very small, the working temperature range is very small, the processing is very difficult, the fiber formation rate is low Not suitable for industrial application. E glass reduces silicon aluminum content, the molding temperature and liquid phase temperature are significantly reduced, but its thermal ...

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Problems solved by technology

[0006] In order to make up for the deficiencies of the prior art and solve the problems in the prior art that the expansion coefficient of glass fiber is not low enough, the production difficulty is high, and the mechanical properties such as elastic modulus cannot meet the requirements at the same time, the present invention provides a glass with a low thermal expansion coefficient and a high modulus fiber

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