Method for preparing nano zirconium boride ceramic fibers from organic zirconium source, ceramic fibers and application

Abstract

The invention relates to the field of nano ceramic fibers, and provides a method for preparing nano zirconium boride ceramic fibers from an organic zirconium source, the ceramic fibers and application. The method comprises the following steps of (1) adding cane sugar into a proper amount of organic solvent, heating to achieve dissolving, sequentially adding triethyl borate and zirconium acetate after cooling, adjusting the pH value of the solution to be acidic with acetic acid, adding a proper amount of a spinning aid after uniform mixing, and conducting stirring for 3-6 hours to obtain a precursor solution; (2) carrying out electrostatic spinning in a proper environment to obtain precursor fibers; and (3) carrying out high-temperature calcination on the precursor fibers in a tubular furnace in an argon atmosphere to obtain the nano zirconium boride ceramic fibers. According to the method, the zirconium acetate which is low in price and can be prepared in a laboratory serves as a zirconium source, the triethyl borate serves as a boron source, the diameter of the zirconium boride ceramic fibers prepared through an electrostatic spinning method is about 200 nm, and the fibers have the properties of being high in specific surface area, low in density, high in temperature resistance, good in thermal shock resistance and the like. The nano zirconium boride ceramic fibers can be usedin the fields of structural components, catalyst carriers, reinforcing materials and the like, and have wide application prospects.

Description

technical field [0001] The invention belongs to the field of nano-ceramic fiber preparation, and in particular relates to a method for preparing nano-zirconium boride ceramic fiber from an organic zirconium source. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the rapid development of modern science and technology, the aviation and aerospace industries are gradually rising, and the conditions for the use of materials are becoming more and more stringent. It quickly reaches 1600°C. During flight, the nose cone, wing leading edge, empennage leading edge, sealing surface and thermal protection system panel all have relatively high temperatures, and conventional mater...

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Problems solved by technology

However, the inventors found that the preparation of nano-zirconium boride fibers by this method takes up to 7 hours during high-temperature pyrolysis, the preparation period is long, and unstable ammonia gas is used as the pyrolysis atmosphere, which has many limitations in the large-scale preparation and application of fibers.

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