Linapanga TUNGSTEN MOLYBDENUM

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Tungsten

Katundu wa tungsten

chiwerengero atomiki 74
CAS chiwerengero 7440-33-7
atomiki misa 183,84
limatsogolera mfundo 3 420 ° C
kuwira mfundo 5 900 ° C
buku atomiki 0,0159 nm 3
Osalimba pa 20 ° C 19.30g / cm³
kapangidwe Crystal thupi zokha kiyubiki
latisi zonse 0,3165 [nm]
Wochuluka mu matanthwe a Dziko Lapansi 1,25 [g / T]
Liwiro phokoso 4620m / s (pa RT) (woonda ndodo)
matenthedwe kuwonjezeka 4.5 μm / (m · K) (pa 25 ° C)
matenthedwe madutsidwe 173 W / (m · K)
magetsi resistivity 52,8 nΩ · mamita (pa 20 ° C)
Mohs kuuma 7.5
Vickers kuuma 3430-4600Mpa
Brinell kuuma 2000-4000Mpa

Tungsten, kapena Bambo Wolfram, ndi chinthu mankhwala chizindikiro W ndi atomiki nambala 74. Dzina tungsten amachokera zakale dzina Swedish kwa tungstate mchere scheelite, tung sten kapena "katundu mwala". Tungsten ndi zitsulo osowa anapeza mwachilengedwe padziko Lapansi mwapadera kawiri pamodzi ndi zinthu zina mankhwala mankhwala osati yekha. Iwo anazindikiritsidwa monga chinthu chatsopano mu 1781 ndi woyamba olekanitsidwa monga chitsulo mu 1783. Ndi ores zofunika monga wolframite ndi scheelite.

Amafotokozera ufulu ndi zothandiza kwambiri robustness lake, makamaka chakuti ali apamwamba limatsogolera mfundo za zinthu zonse azindikira kusungunuka pa 3422 ° C (6192 ° F, 3695 K). Lilinso ndi apamwamba kuwira mfundo, pa 5930 ° C (10706 ° F, 6203 K). kachulukidwe ake nthawi 19,3 kuti madzi, yofanana ndi ya ureniamu ndi golide, ndi apamwamba kwambiri (za 1.7 nthawi) kuposa patsogolo. Polycrystalline tungsten ndi intrinsically Chimaona ndi zovuta zakuthupi (m'mikhalidwe muyezo, pamene uncombined), zikhale zovuta ntchito. Komabe, wangwiro umodzi-crystalline tungsten ndi zambiri ductile ndipo akhoza kudula ndi hacksaw olimbika zitsulo.

Tungsten

Tungsten wa kasakaniza wazitsulo ambiri ofunsira ambiri, kuphatikizapo incandescent getsi filaments, machubu X-ray (monga onse filament ndipo mulingo), maelekitirodi mu mpweya tungsten Arc kuwotcherera, superalloys, ndi cheza kutetezedwa. kuuma Tungsten ndi mkulu osalimba kuupereka ntchito asilikali ozama projectiles. mankhwala Tungsten amagwiritsidwanso monga catalysts mafakitale.

Tungsten ndi zitsulo yekha mu mndandanda lachitatu kusintha kuti amadziwika zimachitika biomolecules kuti zimapezeka mitundu ingapo ya bakiteriya ndiponso archaea. Ndi chinthu yakula amadziwika kuti kofunika kuti aliyense chamoyo moyo. Komabe, tungsten zina ndi molybdenum ndipo thupi mkuwa ndi penapake poizoni mitundu bwino za moyo wa chinyama.



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