A kind of aluminum oxide fiber and preparation method thereof
A technology of alumina fiber and alumina, applied in the field of materials, can solve the problems of low production output, limited development space of mullite fiber, and high production cost
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[0028] The invention provides a method for preparing alumina fibers, comprising:
[0029] A) mixing an aluminum source, a silicon source and other oxide sources to obtain a silicon-aluminum mixed solution;
[0030] B) mixing the first spinning aid and the silicon-aluminum mixed solution, and distilling and concentrating to obtain the spinning inner solution;
[0031] C) preparing the second spinning aid into a solution as an external spinning solution;
[0032] D) The spinning inner solution and the spinning outer solution are combined by blown fiber forming and electrospinning to obtain precursor fibers;
[0033] E) heating the precursor fiber, increasing the temperature, and roasting to obtain alumina fiber.
[0034] The preparation method of the alumina fiber provided by the invention firstly mixes the aluminum source, the silicon source and other oxide sources to obtain the silicon-aluminum mixed liquid.
[0035] According to the present invention, the aluminum source i...
Embodiment 1
[0068] (1) According to the mass ratio of aluminum oxide in basic aluminum chloride and silicon oxide in silica sol is 80:20, weigh them separately and mix them evenly. And the boric acid solution is added according to the proportion that the added amount is 1% of the sum of solid contents of alumina and silica.
[0069] (2) Slowly dissolve polyvinyl alcohol A at 95° C. into an aqueous solution with a mass fraction of 5 wt %, and add the above silicon-aluminum mixed solution in an amount of 3 % of the total solid content.
[0070] (3) Stir the above mixed solution evenly, then distill and concentrate at 150° C. for 2 hours to obtain a transparent and uniform silicon-aluminum composite spinning solution, which is filtered. as spinning solution.
[0071] (4) Take out the above spinning solution and seal it. After aging, a clear and transparent sol was obtained. Spinning aid B was configured into a solution with a mass concentration of 15%, and filtered for later use. As spin...
Embodiment 2
[0075] (1) According to the mass ratio of aluminum oxide in basic aluminum chloride and silicon oxide in silica sol is 95:5, weigh them separately and mix them evenly. And add the boric acid solution according to the proportion that the added amount is 2% of the sum of the solid content of alumina and silica.
[0076] (2) Slowly dissolve polyvinyl alcohol A at 95° C. into an aqueous solution with a mass fraction of 7 wt %, and add the above-mentioned silicon-aluminum mixed solution according to 5% of the total solid content of alumina and silica.
[0077] (3) Stir the above mixed solution evenly, then distill and concentrate at 150° C. for 2.5 hours to obtain a transparent and uniform silicon-aluminum composite spinning solution, which is filtered. as spinning solution.
[0078] (4) Take out the above spinning solution and seal it. After aging, a clear and transparent sol was obtained. Spinning aid B was configured into a solution with a mass concentration of 15%, and filte...
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Abstract
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