Hafnium

Hafnium is a lustrous, silvery, ductile metal generally similar to zirconium. Good corrosion resistance and high strength. Ka atete ki te waikura na te hanga o te uaua, kiriata waikura e kore e taea te uru ki runga i tona mata. The metal is unaffected by alkalis and acids, hāunga te waikawa pūhāhā. Ko te Hafnium he uaua ki te wehe i te ahua o te zirconium, na te mea he ngota te rahi o nga huānga e rua. Ko te Hafnium me ona koranu e whakamahia ana mo nga rakau whakahaere i roto i nga reactors karihi me nga waka moana karihi na te mea he pai te hafnium ki te ngongo i nga neutrons he tino teitei te reactor me te aukati i te waikura.. Kei te whakamahia i roto i te koranu teitei-te wera me te uku, i te mea ko etahi o ona puhui he tino whakakeke: e kore e rewa engari i raro i te tino werawera.

Hafnium (tohu ngota: Hf, tau ngota: 72) he Poraka D, Rōpū 4, Wā 6 huānga me te taumaha ngota o 178.49. The number of electrons in each of Hafnium’s shells is 2, 8, 18, 32, 10, 2 and its electron configuration is [Xe] 4f14 5d2 6s2. The hafnium atom has a radius of 159 pm and a Van der Waals radius of 212 pm. Hafnium was predicted by Dmitri Mendeleev in 1869 but it was not until 1922 that it was first isolated Dirk Coster and George de Hevesy.

In its elemental form, hafnium has a lustrous silvery-gray appearance. Hafnium does not exist as a free element in nature. It is found in zirconium compounds such as zircon. Hafnium is often a component of superalloys and circuits used in semiconductor device fabrication. Its name is derived from the Latin word Hafnia, meaning Copenhagen, where it was discovered. Kei runga ake nei nga korero mo nga korero noa iho. Kaore e tika te kawenga a te Eagle Alloys mo te tika o enei tuhinga, tono ranei. Ko nga tuhinga waahanga kua oti ka tukuna pea ki tetahi atu tuatoru mo te tuku ki waho.