Adding ground fluorite powder makes the molten metals more fluid and protects the titanium from air as it cools.
加入萤石粉(即氟化钙)可以使熔融态的金属更具有流动性，并在钛冷却过程中将钛与空气隔绝。
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Dental amalgams, the silver-colored material used to fill teeth after removal of a cavity, include liquid mercury and a powder that contains silver, tin, copper, zinc, and other metals.
The absorption characteristics of eight kinds of powder layers coated on common metals have been investigated using CO_2 laser beam with low and high power density.