Method for preparing zirconium diboride ceramic films

Abstract

The invention belongs to the field of preparation of materials, and particularly relates to a method for preparing zirconium diboride ceramic films. The method includes (1), dissolving boric acid, sucrose and citric acid in deionized water according to a proportion of 8:4:3 to obtain solution with the boric acid molar mass of 3.5 mol / mL, adding 4 mol / mL aqueous solution of zirconium oxychloride octahydrate into the solution, mixing the aqueous solution and the solution with each other to obtain inorganic solution, regulating the pH (potential of hydrogen) of the inorganic solution until the pH of the inorganic solution reaches 3-5, adding 1.5 mol / ml polyvinyl alcohol solution into the inorganic solution and uniformly stirring the polyvinyl alcohol solution and the inorganic solution to obtain precursor solution; (2), coating the precursor solution on glass plates, drying the glass plates to obtain precursor films and sintering the zirconium diboride precursor films at the temperatures of 1600 DEG C to obtain the zirconium diboride ceramic films. The method for preparing the zirconium diboride ceramic films has the advantages that the zirconium diboride ceramic films prepared by the aid of the method are good in performance and high in purity; a proportion of Zr to B in the zirconium diboride ceramic films prepared by the aid of the method is 1:1.726 and is quite close to a standard proportion of 1:2, accordingly, the zirconium diboride ceramic films are good in purity, and the method is simple and is easy to implement.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a method for preparing a zirconium diboride ceramic thin film. Background technique [0002] Due to the rapid development of aviation and military fields, high temperature resistant ceramic materials (UHTC) have received great attention, zirconium diboride (ZrB 2 ) As a kind of high temperature resistant material, it has a very high melting point (>3000°C), high hardness, good impact resistance and many other excellent properties, but ZrB 2 Poor thermal shock resistance limits its application. At present, many studies are focused on improving the performance of the matrix with fibers and particles, but the reinforcement phase does not have ZrB 2 The special high-temperature performance of the substrate often leads to a decrease in the overall performance. Contents of the invention [0003] The purpose of the present invention is to provide a zirconium dibori...

AI Technical Summary

Problems solved by technology

[0002] Due to the rapid development of aviation and military fields, high temperature resistant ceramic materials (UHTC) have received great attention, zirconium diboride (ZrB 2 ) As a kind of high temperature resistant material, it has a very high melting point (>3000°C), high hardness, good impact resistance and many other excellent properties, but ZrB 2 Poor thermal shock resistance limits its application. At present, many studies are focused on improving the performance of the matrix with fibers and particles, but the reinforcement phase does not have ZrB 2 The special high-temperature performance of the substrate often leads to a decrease in overall performance