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This is a Experimental Study study.

October 18, 2025Open Access

Preparation of W-Cu Composite Powders by Hydrogen Reduction of WO3 And Copper Nitrate Mixture

JCJi Won ChoiSeoul National University of Science and Technology JKJi Young KimSeoul National University of Science and Technology YKYoungmin KimSeoul National University of Science and Technology

Key Points

The research demonstrates that hydrogen reduction successfully creates homogeneous W-Cu composite powders.
Using ultrasonic spray pyrolysis WO3 resulted in spherical agglomerates with fine particles and pores.
TEM analysis confirmed the uniform distribution of Cu elements within the composite powder.
These findings provide insights that may help optimize the synthesis process for W-Cu nanocomposite powders.

Abstract

The synthesis of fine W composite powder with homogeneously dispersed Cu particles was investigated. Commercial or ultrasonic spray pyrolysis WO3 powders were used as source materials of W, and copper nitrate was added and hydrogen-reduced to finally fabricate W-Cu composite powder. The reduced powder prepared using ultrasonic spray pyrolysis WO3 powder exhibited a spherical agglomerate composed of fine particles and pores, whereas that using commercial WO3 showed relatively fine particles with a size of about 200 nm. TEM analysis revealed that Cu elements were uniformly distributed in the composite powder. These results help to optimize the synthesis process of homogeneous W-Cu nanocomposite powders.

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