Niobium Chemical Properties

Niobium ruaj khov nyob rau hauv huab cua ntawm chav tsev kub, thiab tsis tag oxidized thaum liab kub hauv oxygen. Thaum qhov kub thiab txias, nws ncaj qha sib xyaw nrog sulfur, nitrogen thiab carbon, thiab tuaj yeem tsim cov alloys nrog titanium, zirconium, hafnium thiab tungsten. Nws tsis ua nrog inorganic acids lossis hauv paus, thiab tsis soluble hauv aqua regia, tab sis yog soluble hauv hydrofluoric acid.
Niobium hlau yog qhov ruaj khov heev hauv huab cua ntawm chav tsev kub thiab tsis cuam tshuam nrog huab cua. Txawm hais tias nws muaj qhov siab melting point hauv lub xeev singlet (2468 degree), nws muaj qhov ntom ntom dua li lwm cov hlau refractory. Niobium kuj tseem tiv taus ntau hom kev yaig thiab ua cov txheej txheem dielectric oxide.
Niobium yog electropositive tsawg dua lub caij zirconium nyob rau sab laug. Nws cov atoms yuav luag zoo ib yam li cov khoom ntawm lub caij tantalum, uas nyob hauv qab nws, vim yog cov nyhuv contraction ntawm lanthanides. Qhov no ua rau niobium tshuaj zoo ib yam li tantalum. Txawm hais tias nws qhov kev tiv thaiv corrosion tsis siab npaum li Tantalum, nws yog pheej yig dua thiab ntau dua, yog li nws feem ntau siv los hloov Tantalum hauv qhov xav tau tsawg dua, xws li cov khoom siv txheej rau cov tso tsheb hlau luam hauv cov nroj tsuag tshuaj.