A method for preparing a superfine homogeneous single-phase tungsten-rhenium powder

CN118455541BActive Publication Date: 2026-07-21UNIV OF SCI & TECH BEIJING

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: UNIV OF SCI & TECH BEIJING
Filing Date: 2024-05-23
Publication Date: 2026-07-21

AI Technical Summary

Technical Problem

Existing technologies are prone to introducing impurities and powder agglomeration when preparing nano-tungsten-rhenium powder, which makes the sintering densification process difficult and makes it difficult to achieve large-scale production of tungsten-rhenium alloy powders with different rhenium contents.

Method used

A liquid-liquid mixing combined with nitriding decomposition process was adopted, using ammonium metatungstate and ammonium rhenium as raw materials. After being mixed by liquid-phase chemical method, they were heated in a water bath to form a gel-like substance, which was then dried in a blower dryer. Next, they were calcined in a muffle furnace to form a mixed oxide, and then nitrided and decomposed in a tube furnace to finally obtain uniform nano-tungsten rhenium powder.

Benefits of technology

It achieves uniform dispersion of nano-tungsten rhenium powder with an oxygen content of less than 800 ppm and a rhenium content deviation of less than 1.5%, and can be mass-produced, simplifying the process and making it suitable for industrial production.

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Abstract

The application discloses a preparation method of superfine uniform single-phase tungsten-rhenium alloy powder, which uses ammonium metatungstate and ammonium rhenate as raw materials, adopts liquid-liquid mixing mode to obtain a uniform mixed liquid in proportion, evaporates the uniform mixed liquid in a water bath to obtain a gelatinous mixture, places the gelatinous mixture in a blast drying oven to dry to obtain a precursor powder, places the precursor powder in a muffle furnace to calcine to obtain a mixed oxide, and places the mixed oxide in a tube furnace to nitride and decompose to obtain the nano tungsten-rhenium powder. The nano tungsten-rhenium powder has a single phase. The D50 of the nano tungsten-rhenium powder is 40-50 nm, the D90 is 80-100 nm, the oxygen content is not more than 800 ppm, the rhenium content deviation is less than 1.5%, and the XRD result is a single BCC W phase. The raw materials are easy to obtain, the preparation process is simple, the requirement on equipment is low, and batch production of the superfine uniform single-phase tungsten-rhenium alloy powder can be realized.

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