What are the characteristics and preparation methods of nano-metal powder?

Characteristics of nano-metal powder

1. High efficiency catalyst: nano-powder has the characteristics of high activity, large specific surface area so that it is often suitable for use as a catalyst.  Experimental results show that nanometer cobalt powder, zinc powder and so on have strong catalytic effect.  The catalytic efficiency of the catalysts made from these nano-powders is tens of times higher than that of traditional catalysts in the chemical synthesis of some organic compounds, and can be used for hydrogenation of organic compounds, automobile exhaust treatment, etc.  (nano cobalt powder, nano nickel powder, nano zinc powder).

2. High efficiency combustifier: nano powder has strong energy storage characteristics, it can be added into the fuel as an additive can greatly improve the combustion rate.  The combustion heat, combustion efficiency and combustion stability can be greatly improved by adding some nano powders into solid propellant of rocket.  Studies have shown that adding 0.5% nano aluminum powder or nickel powder to rocket solid fuel can increase the combustion efficiency by 10%-25% and accelerate the combustion speed by dozens of times.  (nano aluminum powder, nano nickel powder)  

Preparation method of nano-metal powder

1. Traditional preparation methods: gas phase method, liquid phase method, solid phase method.  

2. New preparation methods: plasma gasification and metal spray combustion.