A kind of low thermal expansion coefficient glass fiber

Abstract

The invention discloses a glass fiber with low thermal expansion coefficient, 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 9.0~16.5%, B 2 o 3 2.0~9.0%, 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 low expansion coefficient 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 , 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; the expansion coefficient of the glass fiber of the present invention is as low as 2.77×10 ‑6 / °C. While ensuring a low expansion coefficient, the glass fiber of the present invention has an elastic modulus as high as 93GPa or more, and is suitable for the requirements of high-precision components.

Description

technical field [0001] The invention relates to the technical field of glass fibers, in particular to a glass fiber with a low thermal expansion coefficient. Background technique [0002] The application of glass fiber has more and more extensive prospects, but due to the high thermal expansion coefficient of most glass series at present, the demand in such as electronic printed circuit board (PCB) and high-precision parts of the automotive industry is limited. The coefficient of thermal expansion is an important thermal property of glass fiber, which largely depends on the chemical composition of glass fiber. [0003] In the common glass fiber series, the expansion coefficient of S series glass is about 4.0×10 -6 / ℃, D glass expansion coefficient is about 3.5×10 -6 / °C. S series glass and D glass have large expansion coefficients, which cannot meet the requirements of high-precision components. [0004] The expansion coefficient of T glass is low, but SiO in T glass 2 ...

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Problems solved by technology

[0007] In order to make up for the deficiencies of the existing technology and solve the problems in the prior art that the expansion coefficient of glass fiber is not low enough, the production difficulty is large, and the mechanical properties such as elastic modulus cannot meet the requirements at the same time, the present invention provides a glass fiber with a low thermal expansion coefficient

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