Preparation of Monosized Spherical Particles by Pulsated Orifice Injection Method.

脉动孔板注射法制备单一尺寸球形颗粒。

• 批准号: 05650692
• 负责人: DATE Kazuhiro
• 金额: $ 1.6万
• 依托单位: TOHOKU UNUVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650692/
• 关键词: monosized particles; piezoelectric actuator; pulsated pressure; spherical particle; microsoldering; オリフィス噴射; 数値シミュレーション

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.

提出了一种能够制备单一尺寸金属颗粒的新方法--脉冲喷孔喷射法（POIM），该方法利用压电陶瓷驱动器的压力传递膜片的剪切作用，将熔融金属从小孔喷射出来。由隔膜的周期性位移引起的每个脉冲压力产生具有几乎等于孔口直径的尺寸的液滴。成功地制备了Pb-Sn合金金属粉末，其颗粒形状为球形，表面光滑，平均粒径的标准偏差为2%，小于传统等离子旋转电极法制备的颗粒。讨论了工艺参数对颗粒形成的影响以及液滴喷射动力学。

项目成果

Akira KAWASAKI,Ryuzo WATANABE,Yasunori KOROKI: "Preparation of Monosized Spherical Powders of Pb-Sn Alloy by Pulsated Orifice Injection Method" To be published in the Proceedings of the 1994 World Powder Metallurgy Congress & Exhibition (Paris).

Akira KAWASAKI、Ryuzo WATANABE、Yasunori KOROKI：“脉冲孔板注射法制备Pb-Sn合金的单尺寸球形粉末” 发表于1994年世界粉末冶金大会论文集