Preparation method of superfine spherical zirconium powder capable of realizing size grading

Abstract

The invention discloses a preparation method of superfine spherical zirconium powder capable of realizing size grading. Based on a hydrogenation dehydrogenation principle, zirconium hydride powder is firstly prepared, temperature-controllable plasma is adopted to heat the zirconium hydride powder for dehydrogenation, the zirconium powder is crushed under the action of gas explosion, and meanwhile, the crushed zirconium powder is subjected to plasma spheroidizing treatment to prepare the spherical zirconium powder. The zirconium powder subjected to plasma dehydrogenation spheroidization is further dehydrogenated under the protection of high-temperature inert gas, the zirconium powder is graded by using the inert gas, and the graded zirconium powder is directly conveyed into a reaction container filled with a passivation reagent for in-situ passivation treatment, so that the passivated spherical zirconium powder with different particle sizes is obtained. The technical problems that the zirconium powder prepared by a hydrogenation dehydrogenation method is irregular in morphology, coarse in particle size, difficult to classify, easy to oxidize, long in technological process and the like are solved, and the preparation cost of the zirconium powder can be reduced.

Description

Technical field [0001] The present invention belongs to the field of metal powder material, and more particularly to a preparation method of ultrafine spherical zirconium powder capable of achieving particle size fractionation. Background technique [0002] The zirconium powder has a large density, high activity, high volume, and a small amount of heat capacity. It is more fun to combust to aluminum powder, and the use of zirconium powder in the propellant has the following advantages: (1) density ratio; 2) The ignition performance is good, which is conducive to increasing the combustion rate; (3) The two-phase flow loss is small; (4) Effective inhibition of unstable combustion. In addition, zirconium powder is high, the energy is large, and the energy is large, can be rapidly consuming and rapidly warming, significantly improves weapon killing. However, the current zirconium powder has high cost, and the preparative zirconium powder is irregular such that zirconium powder is use...

AI Technical Summary

Problems solved by technology

However, the zirconium powder prepared by the hydrodehydrogenation method is irregular, and the particle size of the zirconium powder is difficult to control and classify. The preparation process is long, and the particles are mainly broken and refined by ball milling. The high oxygen content in the zirconium powder leads to the loss of active zirconium.

Spherical zirconium powder can be prepared by methods such as crucible-free atomization, and the purity of zirconium powder is high, but the preparation cost is high and the yield is low, which limits the large-scale application of zirconium powder