Abstract：In order to determine the use of electroless plating method for the preparation of Ce(OH)4 with W particles as the core and Ce(OH)4 as the shell The feasibility of the core shell structure of W@Ce(OH)4 and the reaction pathway of Ce(OH)4. In this study, NaOH was added dropwise to a mixed aqueous solution of Ce(NO3)3-6H2O and polyethylene glycol containing high-purity tungsten powder. The above feasibility and reaction pathway were analyzed by combining experimental observation, microstructure analysis of powder and sintered body. The results show that the electroless plating method can be successfully prepared W@Ce(OH)4 core-shell structure. When the aqueous solution of NaOH is not dripped, even after 24 hours, there is no sign of reaction in a mixed aqueous solution with a weak acidic pH (about 5.63), and Ce(OH)4 shells cannot be formed. After dropping the NaOH aqueous solution dropwise, signs of reaction gradually appear in the aqueous solution. As the amount of NaOH drops increases, the color of the W particles in the mixed solution changes from the original gray to white and eventually to yellow. Ce(OH)4 shell is formed on the surface of W particles by first reacting Ce3+with OH- to form Ce(OH)3 precipitation, which is then formed by reacting with dissolved oxygen and water.
2023, Vol. 