1995 Fiscal Year Final Research Report Summary
Preparation of Monosized Spherical Particles by Pulsated Orifice Injection Method.
Project/Area Number |
05650692
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Material processing/treatments
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Research Institution | TOHOKU UNUVERSITY |
Principal Investigator |
DATE Kazuhiro Faculty of Engineering, Tohoku University Professor, 工学部, 教授 (10111254)
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Project Period (FY) |
1993 – 1995
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Keywords | monosized particles / piezoelectric actuator / pulsated pressure / spherical particle / microsoldering |
Research Abstract |
A novel method being capable of preparing monosized metal particles, termed pulsated orifice injection method (POIM), has been developed, in which molten metal was injected from a small orifice by a clipping action of a pressure transmitting diaphragm given by a piezoelectric actuator. Each pulse pressure, induced by periodic displacement of the diaphragm, produced a liquid droplet having a size almost equal to the orifice diameter. Preparation of metal powders of Pb-Sn alloy was demonstrated in a successful manner, where the shape of the particles is spherical with smooth surface and the standard deviation of the mean particle diameter is 2%, which is less than that for particles prepared by conventional plasma rotating electrode process. The effect of process parameters on the particle formation, as well as the kinetics of liquid droplet injection, was discussed.
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