MGA Technology

Miscibility Gap Alloys (MGA) are a newly developed thermal energy storage media. By providing a cost effective means of energy storage at a large scale, they have the potential to revolutionise the way we think about electricity generation and energy-intensive industry.

So how do they work? Our alloys are made up of 2 components. One of these will melt, while the other stays solid. The melting phase is dispersed as fine grains, and the non-melting phase forms a continuous matrix. When heat is applied, the melting phase melts, storing energy, and the other phase holds everything together and rapidly distributes heat.

Melting phase grains (light), surrounded by the non-melting matrix (dark).

The resulting structure exhibits the high energy storage capacity and constant temperature storage of a phase change system while macroscopically behaving as a continuously solid modular block. This means that there are no expensive containment issues normally seen when trying to store high-temperature phase change materials. As we only use cheap and safe starting materials which exhibit a miscibility gap, our materials can also be cycled a huge number of times while losing little or no storage capacity. All of this combines to make our technology safe, cheap and easy to use.

Our vision is to provide this material to a wide range of applications, to allow high efficiency and reliable electricity generation from variable renewable sources, and enhance future technologies.