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Discovery and Application of Hafnium Elements with High Melting Points

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Update time : 2020-07-17 11:33:49

First Extraction of Hafnium Metal

In 1923, Swedish chemist Hervez and Dutch physicist D. Koster discovered the element hafnium in zircons produced in Norway and Greenland, and named it Hafnium, after the Latin name for the city of Copenhagen. In 1925, Hervis and Koster separated zirconium and titanium by the method of separation crystallization containing fluoro salts to obtain pure hafnium salts; Reduce the hafnium salt with metallic sodium to obtain pure hafnium metal. Herviz produced a sample of a few milligrams of pure hafnium.


Applications of hafnium metal

Hafnium is useful because it emits electrons easily (eg as a filament for an incandescent lamp). Alloys of hafnium and tungsten or molybdenum are used as electrodes for high voltage discharge tubes. Commonly used in X-ray cathode and tungsten manufacturing industries. Pure hafnium has plasticity, easy to process, high temperature resistance and corrosion resistance, is an important material in atomic energy industry. Hafnium thermal neutron capture cross section is an ideal neutron absorber, which can be used as control rod and protection device in atomic reactor. Hafnium powder ACTS as a booster for rockets. Cathodes of X-ray tubes can be manufactured in the electrical industry. Hafnium alloys can be used as front guards for rocket nozzles and glider re-entry vehicles, and hafnium alloys can be used to make tool steel and resistance materials. Hafnium is used as an additive element in heat resistant alloys, such as tungsten, molybdenum, and tantalum.


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