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Ultrahigh-temperature magnesium oxide fibre product and preparation method thereof

A magnesia fiber, ultra-high temperature technology, used in fiber processing, spinning solution preparation, textiles and papermaking, etc., can solve the problem of batch preparation of magnesia fiber and improve the strength of magnesia fiber, magnesia fiberboard and special-shaped parts without breakthrough. It has not been studied, and the strength of magnesium oxide fibers is not high. It achieves the effect of no phase change thermal protection performance, good mechanical properties and high temperature bending resistance, and good thermodynamic stability.

Active Publication Date: 2015-04-22
SHANDONG UNIV
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Problems solved by technology

[0006] At present, the problem of low strength and easy pulverization of magnesia fiber has not been solved, and a series of technical bottlenecks such as batch preparation of magnesia fiber and improvement of magnesia fiber strength have not been solved, so that magnesia fiberboard and special-shaped parts have not been studied. , so far there is no report of magnesium oxide fiber products at home and abroad

Method used

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  • Ultrahigh-temperature magnesium oxide fibre product and preparation method thereof
  • Ultrahigh-temperature magnesium oxide fibre product and preparation method thereof
  • Ultrahigh-temperature magnesium oxide fibre product and preparation method thereof

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Embodiment Construction

[0009] Technical scheme of the present invention is as follows:

[0010] An ultra-high temperature magnesium oxide fiber product, which is composed of magnesium oxide fibers with a diameter of 0.2-30 μm, a mass content of magnesium oxide ≥ 98%, and a density of 0.07-3.0 g / cm 3 .

[0011] According to the present invention, the ultra-high temperature magnesia fiber product can be made into plate shape, strip shape, cylinder shape, cylinder shape and other shapes according to needs, and can be used as heat insulation material.

[0012] According to the present invention, the ultra-high temperature magnesia fiber product can be made into other special-shaped products as required.

[0013] According to the present invention, preferably, the tensile strength of the magnesium oxide fiber is ≥0.5 GPa.

[0014] According to the present invention, preferably, the compressive strength of the fiber product is ≥1.5 MPa.

[0015] According to the present invention, preferably, described...

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Abstract

The invention relates to an ultrahigh-temperature magnesium oxide fibre product and a preparation method thereof. The ultrahigh-temperature magnesium oxide fibre product is composed of magnesium oxide fibres with the diameter of 0.2-30 mu m; the mass content of magnesium oxide is more than or equal to 98%; the density of magnesium oxide is 0.07-3.0g / cm<3>; and the ultrahigh-temperature magnesium oxide fibre product can be prepared into high-temperature-resistant products in shapes of plates, long strips, columns, cylinders and the like according to requirements, and can be used as thermal insulation materials. The fibre product prepared by the invention can be used at 1800-2700 DEG C for a long time; the intensity of the fibre product cannot be lost in the use process; and furthermore, the fibre product can bear high-frequency thermal shock and continuous impact of high-temperature and high-speed air flows.

Description

technical field [0001] The invention relates to a magnesium oxide fiber product and a preparation method thereof, belonging to the technical field of preparation and application of ultra-high temperature refractory materials. Background technique [0002] When a hypersonic vehicle flies at high speed in the atmosphere, aerodynamic heating will seriously damage the structural strength of the vehicle. The thermal protection system (TPS) is a key subsystem to ensure the safe flight of the vehicle in the high-temperature and high-speed oxidative airflow environment. The material required for the TPS of the vehicle It must have the characteristics of high temperature resistance (1100℃~2200℃), high strength, high toughness, light weight and environmental stability at the same time. The ultimate goal is to need a material with high specific strength at high temperature, among which thermodynamic stability is It is the key to determine whether the TPS material can be used safely. ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/04C04B35/622D01F9/08D01D1/02D01D5/00D01D5/18
Inventor 许东林学军王新强朱陆益刘雪松张光辉冯聪靳晓彤
Owner SHANDONG UNIV
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