Daim ntawv thov ntawm Niobium Bar

Niobium tuav yog tsim los ntawm niobium hlau los yog nws cov alloy. Niobium yog cov hlau tsis tshua muaj nyiaj-grey nrog kev ntxhib los mos thiab zoo ductility. Niobium thiab niobium alloys muaj cov ntsiab lus melting siab heev thiab tuaj yeem tswj cov khoom ruaj khov ntawm qhov kub thiab txias. Niobium muaj tshuaj lom neeg ruaj khov zoo heev thiab tuaj yeem tiv thaiv corrosion ntawm ntau cov tshuaj, suav nrog cov kua hlau, kua qaub thiab alkalis. Nyob rau hauv tej yam kev mob, xws li ntxiv zirconium thiab lwm yam khoom, oxidation kuj ntawm niobium tuaj yeem txhim kho tau zoo. Cov yam ntxwv no ua rau niobium muaj cov ntawv thov tseem ceeb hauv kev lag luam nuclear.

Niobium tuav thiab niobium alloy tuav yog siv los ua cov ntaub ntawv ntawm aero-engines thiab cov khoom tseem ceeb xws li foob pob hluav taws nozzles, thiab nyiam rau lawv qhov kub thiab txias zog thiab corrosion kuj. Niobium alloy kuj tseem siv rau hauv qee cov khoom siv high-end airframe, xws li foob pob hluav taws propulsion nozzle siv hauv Gemini program thiab Apollo lunar module. Niobium muaj ib qho me me thermal neutron absorption cross-section thiab zoo corrosion kuj, yog li nws tuaj yeem siv los ua cov khoom siv rau atomic reactors thiab ntim khoom rau cov roj nuclear. Niobium kuj tseem siv tau los ua cov khoom siv ntxiv rau cov roj nuclear los txhim kho kev ua haujlwm thiab kev nyab xeeb ntawm lub reactor.

Niobium tuav ua lub luag haujlwm tseem ceeb hauv cov khoom siv tshuaj tiv thaiv corrosion, xws li ua ntau yam corrosion-resistant qhov chaw nyob rau hauv corrosion-resistant tej yam kev mob ntawm nitric acid, hydrochloric acid los yog sulfuric acid. Niobium thiab niobium alloy hlau yog dav siv los tsim cov khoom siv hluav taws xob xws li high-pressure sodium teeb thiab anode leads ntawm electrolytic capacitors. Niobium kuj tseem siv tau los ua cov khoom siv superconducting, getters rau lub tshuab nqus tsev vacuum thiab cov nqi tsev rectifiers. Nyob rau hauv zus tau tej cov micro-alloyed steel, niobium yog ib tug zoo heev additive ntsiab, uas yuav ho txhim kho lub hardness, lub zog, malleability thiab weldability ntawm hlau.

Thaum lub niobium bar siv nyob rau hauv ib puag ncig kub, nws yuav tsum tau muab sau tseg tias niobium pentoxide oxide zaj duab xis uas tsis muaj kev tiv thaiv tej zaum yuav tshwm sim nyob rau hauv nws nto, yog li yuav tsum tau ntxiv kev tiv thaiv, xws li txheej. Kev ua thiab siv cov niobium rods yuav tsum ua raws li cov cai tswj kev nyab xeeb thiab cov txheej txheem kev ua haujlwm kom muaj kev nyab xeeb ntawm cov neeg ua haujlwm thiab cov khoom siv.

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