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Porous mullite fiber product

A technology of porous mullite and mullite fibers, which can be applied in the fields of chemical characteristics of fibers, rayon manufacturing, textiles and papermaking, etc., can solve the problems of high labor cost, complicated process, difficult continuous production, etc. Thermal effect, high thermal decomposition temperature, effect of reducing expansion rate

Active Publication Date: 2014-11-05
HUZHOU TEACHERS COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is relatively complicated, it is difficult to carry out continuous production, and the labor cost is high

Method used

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Embodiment Construction

[0027] The invention provides a porous mullite fiber product, which comprises the following three key process steps.

[0028] The first step is to modify the mullite fiber. Mullite can use Al 4+2x Si 2-2x o 10-x where x represents an oxygen vacancy (value range 0.2 to 0.9), and its structure terminates at the crystal surface, which will generate paired electrons, that is, dangling bonds. -OH structure can be formed in water. This structure is the reason why the mullite fiber can be chemically combined with the coupling agent. (1) Mix unmodified mullite fiber with aluminum-zirconium coupling agent, as a preference, the ratio of mass fraction is 100:10. Considering that any agitation has the possibility of fragmentation and shortening for brittle mullite inorganic fibers, once the fibers are shortened, on the one hand, it will affect the quality of the product, on the other hand, short and thin fibers will have an impact on industrial workers and the environment , so in th...

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Abstract

The invention belongs to the technical field of refractory material, and in particular relates to a porous mullite fiber product. The fiber product comprises the following components according to weight percentage: 85wt%-95wt% of modified mullite fiber, 1wt%-5wt% modified carbon fiber, 0.1wt%-1wt% of calcined alumina powder, 0.5wt%-2wt% silica sol, 0.2wt%-1.2wt% of sodium hypochlorite, 0.7wt%-1.3wt% of starch, and 0.5wt%-1.5wt% of an additive; the mullite fiber comprises the following chemical components: 50wt%<= Al2O3<= 70wt%, 25wt%<= SiO2<= 28wt%, and oily substances > 2wt%. The invention can prolong the service life of the mullite fiber porous product, and enhance the thermal insulation effect.

Description

technical field [0001] The invention belongs to the technical field of fire-resistant and heat-insulating materials, and in particular relates to a porous mullite fiber product. Background technique [0002] Mullite fiber is a kind of basic material in the field of high temperature technology. It has a series of excellent properties, including high melting point (1850 ° C), excellent high temperature creep resistance, excellent high temperature strength, electrical insulation and chemical stability. , low thermal conductivity and thermal expansion coefficient (~5.3×10 -6 K), as well as excellent corrosion resistance and high shear modulus, play a very prominent role in the development of the national economy, and are closely related to the development of steel, nonferrous metals, building materials, energy and new technology industries. Important Guarantee. Therefore, mullite fiber has been paid more and more attention as a light-weight and high-temperature resistant mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01F1/10D01F11/00
Inventor 陈海锋
Owner HUZHOU TEACHERS COLLEGE
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