Production method of superfine silver-tin binary alloy powder used for electronic paste

• Main Authors: MA LIBO, LI YONGHONG, GAO SHUJUAN, SONG SHUQING, CHEN GANGQIANG
• Format: Patent
• Language: Chinese; English
• Published: 24.03.2020
• Subjects: CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

The invention discloses a production method of a superfine silver-tin binary alloy powder used for an electronic paste. The method comprises the following steps of (1) selecting production equipment;(2) putting silver and tin into a crucible in a metal heating evaporation system according to a weight ratio; (3) starting an air blower in a power system, and replacing air in the system with an inert gas till that the system is in an oxygen-free atmosphere; (4) rapidly melting the metal in the crucible into a metal liquid under heating of a high-temperature plasma, and forming metal steam on a liquid level of the crucible; (5) sucking the metal steam into a metal steam condensation powder forming system under carrying of the inert gas; and (6) making the metal alloy powder enter into a gas-dust separation system. The method is completely spherical, a surface oxygen content is low, components are uniform and controllable and a sintering temperature is low. 本发明公开了一种电子浆料用超细银锡二元合金粉的生产方法，其特征在于：包括以下步骤：（1）选取生产设备，（2）将银和