Cobalt can be converted into complex ion by excess ammonia and then recovered as highly pure metal cobalt powder by replacing with zinc powder.

所得少量浓缩液去掉铁等杂质之后，加过量氨使钴形成络合物，再用锌粉置换出金属钴粉。

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In coat flake form aluminium powder basically is layer upon layer overlay, zinc powder did not distribute evenly in aluminium powder, glue knoted together between metal powder.

涂层中片状铝粉基本上是层层盈加，锌粉不均匀地夹杂在铝粉中，金属粉之间通过粘结剂粘结在一起。

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This paper designs a new kind of nozzle used for laser welding of zinc-coated steels with metal powder and studies the better modality of shielding gas and the powder beam with schlieren device.

本文设计了一套应用于镀锌板激光填充粉末焊接的喷嘴，并利用纹影仪等手段研究了该喷嘴的最佳保护气流量和最佳粉末束拘束度参数；

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