一种氧化-还原方法交替制备细小氧化物颗粒增强银基电接触材料的工艺

Process for preparing fine oxide particle reinforced silver-based electric contact material by oxidization-reduction method

Abstract

The invention relates to a process for preparing a fine oxide particle reinforced silver-based electric contact material by an oxidization-reduction method. The process comprises the steps of smelting, surface treatment, extrusion, drawing, thrusting and cutting, alternative oxidization and reduction, ingoting, sintering, extrusion and drawing, wherein the added substances comprises two or mote than two of Ce, La, Dy and Ge, and the weight percentages are as follows: 85-90% of Ag, 3-13% of Sn, 2-3% of In, 0-1.0% of Ce, 0-1.0% of La, 0-1.0% of Dy and 0-1.0% of Ge. The process is adopted to enable oxygen to be fully and rapidly diffused to the inside through a grain boundary, the oxidization speed is greatly increased, and the sizes of oxide particles are sharply reduced; the oxide particles in the silver tin oxide electric contact material prepared by the process are fine, and the reliability, the stability and the welding resistance of the welding resisting property of the electric contact material are remarkably improved.
本发明涉及一种氧化-还原交替方法制备氧化物颗粒细小的银氧化锡电接触材料。步骤包括熔炼、表面处理、挤压、拉拔、冲断、氧化-还原交替、压锭、烧结、挤压、拉拔,所述添加物包括Ce、La、Dy、Ge中的两种或两种以上,以重量百分比计,Ag85-90%,Sn3-13%,In2-3%,Ce0-1.0%,La0-1.0%、Dy0-1.0%、Ge0-1.0%。本发明的应用,使得氧可以充分、快速通过晶界扩散至内部,氧化速率大大增加,氧化物颗粒尺寸急剧减小。采用该方法制备的银氧化锡电接触材料中氧化物颗粒细小,电接触材料的可靠性、稳定性以及抗熔焊性能等得到了显著提高。

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    CN-105702503-AJune 22, 2016福达合金材料股份有限公司Preparation method for silver tin oxide indium oxide contact material