Glass fiber based composite absorbing material and preparation method thereof
A composite wave absorbing material and glass fiber technology, applied in the field of wave absorbing material manufacturing, can solve problems such as poor wave absorbing performance and complicated process, and achieve the effect of improving electromagnetic performance, simple process and repairing shrinkage cracks
Active Publication Date: 2015-04-29
CHINA BUILDING MATERIALS ACAD
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[0003] In order to overcome the disadvantages of poor absorbing performance and complex process of the above-mentioned absorbing materials, the present invention provides a method for preparing a glass fiber-based composite absorbing material. The absorbing performance is very good
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[0026] In order to further illustrate the technical means and effects of the present invention to achieve the intended purpose of the invention, the preparation method of a glass fiber-based composite wave-absorbing material proposed according to the present invention is described in detail as follows with a preferred embodiment.
[0027] The preparation method of a glass fiber-based composite wave-absorbing material provided by the present invention comprises the following steps: preparation of wet gel: preparing barium-containing citric acid mixed solution and iron-containing citric acid mixed solution respectively, and taking the barium-containing citric acid mixed solution Mix with iron-containing citric acid mixture, Ba in the mixture 2+ and Fe 3+ The molar ratio of the mixture is 1:8~13, the pH value of the above mixed solution is adjusted to 6~8 by ammonia water, and then heated at 80~100°C for 2~5 hours to form a wet gel, wherein: barium-containing citric acid is mixed...
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Abstract
The invention relates to the field of processing of glass fibers and particularly relates to a glass fiber based composite absorbing material and a preparation method thereof. The preparation method comprises the following steps: respectively preparing mixed liquor containing barium citrate and mixed liquor containing iron citrate, mixing the mixed liquor containing barium citrate with the mixed liquor containing iron citrate according to a molar ratio of 1: (8-13), regulating the pH of the mixed liquor to 5-9 by using ammonia water, and then heating at 80-100 DEG C for 2-5 hours to generate wet gel; placing glass fibers with surfaces roughened in the wet gel, coating the surfaces of the glass fiber with a layer of wet gel, and drying the glass fibers coated with the wet gel to form glass fibers coated with the wet gel; maintaining the temperature of the glass fibers coated with the wet gel at 600-800 DEG C for 1-3 hours, and then cooling; placing the barium ferrite / glass fiber composite material in an impregnating compound, taking out the barium ferrite / glass fiber composite material and drying. The glass fiber based composite absorbing material provided by the invention has good mechanical properties and electromagnetic wave absorption properties.
Description
technical field [0001] The invention relates to the field of wave-absorbing material manufacturing, in particular to a method for preparing a glass fiber-based composite wave-absorbing material. Background technique [0002] With the development of modern science and technology, the electromagnetic environment is becoming increasingly complex. After noise pollution, air pollution, and water pollution, electromagnetic pollution has become the fourth major public hazard that threatens human survival. It is of great practical significance to develop and produce efficient and lightweight electromagnetic shielding and wave-absorbing materials. At present, absorbing materials can be divided into two categories: coating type and structure type. Compared with coating-type absorbing materials, structural absorbing materials not only have excellent electromagnetic wave absorption performance, but also have the advantages of light weight, high strength, and can be used as load-bearing...
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IPC IPC(8): C04B35/80C04B35/26C04B35/624
Inventor 徐铭贾菲许海龙鲍红权张帆崔凯
Owner CHINA BUILDING MATERIALS ACAD