Izakhiwo ze-Tungsten
| Inombolo ye-athomu | 74 |
| Inombolo ye-CAS | 7440-33-7 |
| Isisindo se-athomu | 183.84 |
| Iphoyinti lokuncibilika | 3 420 °C |
| Iphuzu elibilayo | 5 900 °C |
| Ivolumu ye-athomu | 0.0159 nm3 |
| Ukuminyana ku-20 °C | 19.30g/cm³ |
| Isakhiwo sekristalu | cubic egxile emzimbeni |
| I-lattice engaguquki | 0.3165 [nm] |
| Ukuchichima koqweqwe lomhlaba | 1.25 [g/t] |
| Isivinini somsindo | 4620m/s (ku-rt)(induku ezacile) |
| Ukunwetshwa kwe-thermal | 4.5 µm/(m·K) (ku-25 °C) |
| I-Thermal conductivity | 173 W/(m·K) |
| Ukumelana nogesi | 52.8 nΩ·m (ku-20 °C) |
| Mohs ubulukhuni | 7.5 |
| Vickers ubulukhuni | 3430-4600Mpa |
| Ukuqina kweBrinell | 2000-4000Mpa |
I-Tungsten, noma i-wolfram, iyikhemikhali enophawu W kanye nenombolo ye-athomu engu-74. Igama elithi tungsten livela egameni lesi-Swedish langaphambili le-tungstate mineral scheelite, i-tung sten noma "itshe elisindayo". I-Tungsten iyinsimbi eyivelakancane etholakala ngokwemvelo eMhlabeni icishe ihlanganiswe kuphela nezinye izakhi ezinhlanganisela zamakhemikhali kunokuba yodwa. Yahlonzwa njengento entsha ngo-1781 futhi yaqala ukuhlukaniswa njengensimbi ngo-1783. Insimbi ebalulekile ihlanganisa i-wolframite ne-scheelite.
Isici samahhala siyaphawuleka ngokuqina kwayo, ikakhulukazi iqiniso lokuthi inendawo ephakeme kakhulu yokuncibilika yazo zonke izakhi ezitholiwe, incibilika ku-3422 °C (6192 °F, 3695 K). Futhi inephuzu lokubilisa eliphakeme kakhulu, ku-5930 °C (10706 °F, 6203 K). Ukuminyana kwayo kuphindwe izikhathi ezingu-19,3 kunamanzi, uma kuqhathaniswa ne-uranium negolide, futhi kuphakeme kakhulu (cishe izikhathi ezingu-1,7) kunomthofu. I-Polycrystalline tungsten iyinto eqinile futhi eqinile (ngaphansi kwezimo ezijwayelekile, uma ingahlanganisiwe), okwenza kube nzima ukusebenza. Kodwa-ke, i-single-crystalline tungsten emsulwa iyi-ductile futhi ingasikwa nge-hacksaw yensimbi eqinile.
Ama-alloys amaningi e-Tungsten anezinhlelo eziningi zokusebenza, okuhlanganisa imicu ye-incandescent light bulb, amashubhu e-X-ray (njengawo kokubili umcu kanye nethagethi), ama-electrode ku-gas tungsten arc welding, ama-superalloy, nokuvikela imisebe. Ubulukhuni be-Tungsten kanye nokuminyana okuphezulu kunikeza ukusetshenziswa kwezempi kuma-projectiles angenayo. Ama-Tungsten compounds nawo avame ukusetshenziswa njengama-catalysts ezimbonini.
I-Tungsten iyona kuphela insimbi evela ochungechungeni lwenguquko lwesithathu olwaziwayo ukuthi lwenzeka kuma-biomolecules atholakala ezinhlotsheni ezimbalwa zamabhaktheriya kanye ne-archaea. Yisici esinzima kunazo zonke ezaziwayo ukuthi sibalulekile kunoma iyiphi into ephilayo. Kodwa-ke, i-tungsten iphazamisa i-molybdenum ne-copper metabolism futhi ithi thizeni inobuthi ezinhlotsheni ezijwayeleke kakhulu zezilwane.
Imikhiqizo eshisayo ye-Tungsten
