Lub cev muaj zog ntawm Niobium thiab Tantalum

Niobium muaj greyish-dawb xim hlau luster, hmoov yog tsaus thiab zoo li platinum; tantalum yog grey thiab hnyav heev; Ob qho tib si niobium thiab tantalum yog qhov nyuaj heev thiab nyuaj rau yaj. Kub, uas yog "tsis ntshai ntawm hluav taws", muaj qhov melting point tsuas yog 1063 degrees Celsius. Platinum, uas yog ib qho nrov tshaj plaws kub-resistant hlau, yog yaj tag thaum nws tshaj 1769 degrees Celsius. Txawm li cas los xij, lub melting point ntawm niobium yog siab li 2400 degrees Celsius, thiab lub melting point ntawm tantalum yog ze rau 3000 degrees Celsius. Lub plasticity ntawm ntshiab niobium yog qhov zoo heev, thiab nws tuaj yeem dov rau hauv ib daim ntawv nyias nyias hauv lub xeev txias yam tsis muaj qhov nruab nrab annealing;