Zithunzi za Tungsten
| Nambala ya atomiki | 74 |
| Nambala ya CAS | 7440-33-7 |
| Misa ya atomiki | 183.84 |
| Malo osungunuka | 3 420 °C |
| Malo otentha | 5900 °C |
| Mphamvu ya atomiki | 0.0159 nm3 |
| Kuchuluka kwa 20 ° C | 19.30g/cm³ |
| Kapangidwe ka kristalo | cubic yokhala ndi thupi |
| Lattice yosasintha | 0.3165 [nm] |
| Kuchuluka mu kutumphuka kwa dziko lapansi | 1.25 [g/t] |
| Liwiro la mawu | 4620m/s (pa rt) (ndodo yowonda) |
| Kukula kwamafuta | 4.5 µm/(m·K) (pa 25 °C) |
| Thermal conductivity | 173 W/(m·K) |
| Kulimbana ndi magetsi | 52.8 nΩ·m (pa 20 °C) |
| Mohs kuuma | 7.5 |
| Vickers kuuma | 3430-4600Mpa |
| Brinell kuuma | 2000-4000Mpa |
Tungsten, kapena wolfram, ndi mankhwala okhala ndi chizindikiro W ndi nambala ya atomiki 74. Dzina lakuti tungsten limachokera ku dzina lakale la Swedish la tungstate mineral scheelite, tung sten kapena "mwala wolemera".Tungsten ndi chitsulo chosowa chomwe chimapezeka mwachilengedwe padziko lapansi pafupifupi chophatikizika ndi zinthu zina mumagulu amankhwala osati okha.Idadziwika kuti ndi chinthu chatsopano mu 1781 ndipo idadzipatula koyamba ngati chitsulo mu 1783. Ndi zofunika kwambiri ores monga wolframite ndi scheelite.
Chinthu chaulere ndi chodabwitsa chifukwa cha kulimba kwake, makamaka chifukwa chokhala ndi malo osungunuka kwambiri kuposa zinthu zonse zomwe zapezeka, kusungunuka pa 3422 °C (6192 °F, 3695 K).Ilinso ndi malo otentha kwambiri, pa 5930 °C (10706 °F, 6203 K).Kuchulukana kwake ndi kuwirikiza ka 19.3 kuposa madzi, kuyerekeza ndi uranium ndi golidi, ndipo kuŵirikiza kwambiri (pafupifupi nthaŵi 1.7) kuposa kuja kwa mtovu.Polycrystalline tungsten ndi chinthu chosalimba komanso cholimba (pansi pamikhalidwe yoyenera, ikasakanikirana), zomwe zimapangitsa kuti zikhale zovuta kugwira ntchito.Komabe, tungsten yoyera ya single-crystalline ndi ductile ndipo imatha kudulidwa ndi hacksaw yachitsulo cholimba.
Ma aloyi ambiri a Tungsten ali ndi ntchito zambiri, kuphatikiza ma incandescent mababu, machubu a X-ray (monga ma filament ndi chandamale), ma elekitirodi mu mpweya wa tungsten arc welding, superalloys, ndi chitetezo cha radiation.Kuuma kwa Tungsten ndi kachulukidwe kakang'ono kumapereka ntchito zankhondo polowera ma projectiles.Mankhwala a Tungsten amagwiritsidwanso ntchito nthawi zambiri ngati zopangira mafakitale.
Tungsten ndiye chitsulo chokhacho kuchokera pamtundu wachitatu wosinthika womwe umadziwika kuti umapezeka m'ma biomolecules omwe amapezeka mumitundu ingapo ya mabakiteriya ndi archaea.Ndilo chinthu cholemera kwambiri chomwe chimadziwika kuti ndi chofunikira kwa chamoyo chilichonse.Komabe, tungsten imasokoneza kagayidwe kake ka molybdenum ndi mkuwa ndipo ndi poizoni ku mitundu yodziwika bwino ya nyama.
Zogulitsa Zotentha za Tungsten
