Abstract
The liquid-phase reduction method for synthesis of metallic ultrafine particles is known to be advantageous to the production for bimetallic ultrafine particles.By use of this method, the following results were obtained.(1) In aqueous media, the increase in drop-rate of a reducer solution into a metal salt solution caused the remarkable decrease in the particle size for Ni-Zn bimetallic fine particles.(2) The strong dependency of the particle size on the synthesis temperature was found in both aqueous and nonaqueous media for Ni-Zn bimetallic fine particles(3) By means of X-ray diffraction analysis, metallic Ni ultrafine particles produced in nonaqueous media were found amorphous.(4) Amorphous Ni-Zn ultrafine alloy particles were easily produced with the addition of a reducer solution into a Ni-Zn bimetal salt solution. However, no formation of alloy phase was give the synthesis of o-Zn bimetallic ultrafine particles by the similar manner.
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