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The Tough guy in rare metals
2024-04-02 15:24:46
In the rare metal family, there are many members of the "tenacious character." They not only have a high melting point, but also have strong corrosion resistance and are not easy to be oxidized in the air, so they are called "tough guys" in metals.
The toughest guy is the metal tungsten.
Its melting point is as high as 3410 ° C, which is the highest of all metals, so it can be used as a filament material. Tolerating high temperatures of 2000°C is a piece of cake for tungsten. Tungsten metal is mainly used in cemented carbide, special steel and other products, is widely used in the national defense industry, aerospace, information industry, some people gave it the title of "industrial teeth".
The second highest melting point is the metal rhenium at 3180°C.
It is worth mentioning that rhenium is a truly rare element. It is very rare and dispersed in the Earth's crust, only higher than such elements as protactinium and radium. Therefore, it was one of the last elements found in nature. Since Mendeleev discovered the periodic law of the elements, scientists have not found it after more than half a century of efforts, until 1925, it was discovered by German chemists.
The third highest melting point is metal hunger at 3045°C.
At the same time, it is also the heaviest metal in nature, with a density of up to 22.4 g/cm³.
In fourth place is the metal tantalum, which has a melting point of 2,996 °C.