Preparation method of oxide high-entropy ceramic fiber

A method for preparing an oxide high entropy ceramic fiber comprising the steps of:

• configuring a spinning solution with an organic polymer precursor of at least five elements of Zr, Hf, Ti, Ce, Y, La, Gd, Er, Sm and/or its corresponding nitrate as a metal source, anhydrous methanol or anhydrous ethanol or a mixture thereof as a spinning solvent, and polyvinylpyrrolidone (PVP), polyethylene oxide (PEO), or a mixture of PVP and PEO as a spinning auxiliary;
• the mass ratio of the metal source, the spinning solvent The mass ratio of the metal source, spinning solvent, and spinning aid was (10-30):(20-40):(0.06-0.15);
• the spinning solution was electrostatically spun at a spinning voltage of 4-10 kV to obtain oxide high-entropy ceramic precursor fibers, and the precursor fibers were heat-treated in air to obtain oxide high-entropy ceramic fibers.