Platinum-gallium alloy for platinum jewelry or platinum spring and preparation method of platinum-gallium alloy

The invention provides a platinum-gallium alloy for platinum jewelries or platinum springs and a preparation method of the platinum-gallium alloy. The mass ratio of metal gallium to metal platinum in the platinum-gallium alloy is (0.01-0.06): 1. The platinum-gallium alloy is high in hardness, white in color and luster and bright in surface; the platinum jewelry prepared from the platinum-gallium alloy is not easy to wear and not easy to stretch and deform; the platinum spring prepared from the platinum-gallium alloy is good in elasticity and durable in use; and the preparation method is simple, high in efficiency, low in platinum loss and easy to industrialize. 本发明提供了一种用于铂金首饰或铂金弹簧的铂镓合金及其制备方法，所述铂镓合金中金属镓与金属铂的质量比为(0.01-0.06):1。本发明所述铂镓合金的硬度大，色泽白，表面光亮；所述铂镓合金制备的铂金首饰不易磨损，不易拉伸变形；所述铂镓合金制备的铂金弹簧弹性好，经久耐用；且制备方法简单，效率高，造成的铂金损耗少，易于工业化。