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Nickel yog dab tsi?

Nws yog cov khoom siv tshuaj lom neeg nrog cov cim tshuaj Ni thiab atomic naj npawb 28. Nws yog ib qho lustrous silvery dawb hlau nrog cov lus qhia ntawm kub hauv nws cov xim dawb. Nickel yog ib qho kev hloov pauv hlau, tawv thiab ductile. Cov tshuaj lom neeg ua haujlwm ntawm cov nickel ntshiab yog qhov siab heev, thiab qhov kev ua no tuaj yeem pom hauv cov hmoov av uas thaj chaw reactive saum npoo yog maximized, tab sis cov nickel hlau ntau reacts maj mam nrog cov huab cua nyob ib puag ncig vim hais tias ib txheej ntawm oxide tiv thaiv tau tsim nyob rau saum npoo. . yam. Txawm li cas los xij, vim muaj kev ua haujlwm siab txaus ntawm npib tsib xee thiab cov pa oxygen, nws tseem nyuaj rau nrhiav tau cov xim hlau npib tsib xee rau saum npoo ntawm lub ntiaj teb. Lub ntuj npib tsib xee nyob rau hauv lub ntiaj teb nto yog nyob rau hauv loj nickel-hlau meteorites, vim hais tias meteorites tsis muaj oxygen thaum lawv nyob rau hauv qhov chaw. Nyob rau hauv lub ntiaj teb, cov nickel ntuj no yeej ib txwm ua ke nrog hlau, xav tias lawv yog cov khoom tseem ceeb kawg ntawm supernova nucleosynthesis. Nws feem ntau ntseeg tias lub ntiaj teb lub hauv paus yog tsim los ntawm nickel-hlau sib tov.
Kev siv cov npib tsib xee (lub ntuj npib tsib xee-hlau alloy) hnub rov qab mus txog 3500 BC. Axel Frederick Kronstedt yog thawj zaug cais cov npib tsib xee thiab txhais tias nws yog cov khoom siv tshuaj lom neeg hauv xyoo 1751, txawm hais tias nws pib yuam kev cov nickel ore rau cov ntxhia ntawm tooj liab. Lub npe txawv teb chaws ntawm npib tsib xee los ntawm qhov tsis zoo goblin ntawm tib lub npe nyob rau hauv cov lus dab neeg ntawm German miners (Nickel, uas zoo ib yam li lub npe menyuam yaus "Old Nick" rau dab ntxwg nyoog hauv lus Askiv). . Qhov nyiaj txiag tshaj plaws ntawm npib tsib xee yog hlau ore limonite, uas feem ntau muaj 1-2% npib tsib xee. Lwm cov minerals tseem ceeb rau nickel muaj xws li pentlandite thiab pentlandite. Cov neeg tsim khoom loj ntawm npib tsib xee suav nrog thaj tsam Soderbury hauv Canada (uas feem ntau ntseeg tau tias yog lub pob zeb meteorite), New Caledonia hauv dej hiav txwv Pacific, thiab Norilsk hauv Russia.
Vim tias npib tsib xee oxidizes qeeb ntawm chav tsev kub, nws feem ntau suav hais tias yog corrosion resistant. Vim li no, npib tsib xee tau siv keeb kwm los siv rau ntau qhov chaw, xws li hlau (xws li hlau thiab tooj dag), sab hauv ntawm cov khoom siv tshuaj lom neeg, thiab qee cov alloys uas yuav tsum tau ua kom muaj qhov ci ci tiav (xws li cov nyiaj npib tsib xee) . Kwv yees li 6% ntawm lub ntiaj teb nickel ntau lawm yog tseem siv rau corrosion-resistant ntshiab npib tsib xee plating. Nickel yog ib qho piv txwv ntawm cov nyiaj npib, tab sis qhov no feem ntau tau hloov los ntawm cov hlau pheej yig dua, tsis yog vim qee tus neeg muaj tawv nqaij ua xua rau npib tsib xee. Txawm li cas los xij, Tebchaws Askiv tau pib minting npib hauv npib tsib xee dua hauv xyoo 2012, dhau qhov kev tawm tsam ntawm cov kws kho mob dermatologist.
Nickel yog ib qho ntawm plaub lub ntsiab lus uas yog ferromagnetic ntawm chav tsev kub. Nickel-muaj alnico cov hlau nplaum ruaj khov muaj lub zog sib nqus ntawm cov hlau nplaum uas muaj hlau nplaum ruaj khov thiab cov hlau nplaum tsis tshua muaj hauv ntiaj teb. Nickel cov xwm txheej hauv lub ntiaj teb niaj hnub no feem ntau yog vim nws cov alloys ntau yam. Txog 60% ntawm lub ntiaj teb nickel ntau lawm yog siv los tsim ntau yam nickel steels (tshwj xeeb tshaj yog stainless hlau). Lwm cov alloys sib xws, nrog rau qee cov superalloys tshiab, suav txog ze li ntawm tag nrho lub ntiaj teb siv npib tsib xee ntxiv. Cov tshuaj siv los ua cov khoom sib txuas rau tsawg dua 3 feem pua ​​​​ntawm cov nickel ntau lawm. Raws li kev sib xyaw ua ke, npib tsib xee muaj ntau qhov tshwj xeeb siv hauv kev tsim tshuaj lom neeg, piv txwv li catalyst rau cov tshuaj tiv thaiv hydrogenation. Cov enzymes ntawm qee cov kab mob thiab cov nroj tsuag siv npib tsib xee ua qhov chaw nquag, yog li nickel yog ib qho tseem ceeb rau lawv. [1]


Lub sij hawm xa tuaj: Nov-16-2022