In electroplating, powders can be a very bad thing, but sometimes bad can be good. We are going to discuss doing a ‘bad thing’, but doing it consistently well.
1. There are five typical ways of making metal powders:
- Melting and atomizing
3. Careful control of key parameters can be used to make consistent powders:
- Metal concentration
- Deposition time
- Flow Rate
- Current density
These parameters can affect the particle size, shape, and density.
4. Powders have a very high surface area. For example, if you take 1 mg of
Another way to increase surface area is to stretch
5. An increase in surface area of powders can be achieved by changing the shape. We can make powder deposits under controlled conditions in order to increase surface area. Changing these conditions can lead to the production of very interesting powders which can be dendritic, fern-like structures with very high surface area and reactivity that ideal for a variety of high-tech applications.