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Galinstan

physical science Maturity 11-13 Next article →

Galinstan is a very special kind of metal mix. This mix is called an alloy. It is made from three different metals: gallium, indium, and tin. Most metals are hard and solid at room temperature. However, galinstan stays liquid even when it is not hot. This makes it very useful for many jobs. It can flow into small spaces and move easily.

Scientists make a specific version called a eutectic alloy. This version melts at a very low temperature. It is made of 68.5% gallium, 21.5% indium, and 10.0% tin by mass. The commercial brand name Galinstan is a near-eutectic alloy. This means it is very close to that special mix. It may also have extra parts to help it flow better. These parts reduce surface tension and help it stay runny.

The name galinstan is a clever word. It is a portmanteau, which is a mix of words. It takes parts from gallium, indium, and the Latin word for tin, stannum. The name is a registered trademark of a company in Germany. This metal is much safer than older liquid metals. For example, it can replace toxic mercury in many tools. It can also replace the reactive sodium-potassium alloy.

Galinstan has many different uses in our world. It is used in thermometers to measure temperature. It can also be used in large liquid-mirror telescopes in astronomy. Some people use it to cool computer parts. It moves heat away better than most thermal pastes. This helps computers run with more power. However, users must be careful because it can damage aluminum.

New technology uses galinstan in amazing ways. It can act like a liquid wire in soft robots. This helps create electronics that can stretch and bend. Scientists also use it in some X-ray machines. In these machines, the metal flows quickly from a nozzle. This fast flow keeps the machine from getting too hot. It also helps the machine make very clear X-ray images.

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