Kev tsim cov niobium

Niobium hlau tuaj yeem tsim los ntawm electrolysis ntawm molten potassium niobium heptafluoride, los yog txo cov poov tshuaj niobium heptafluoride nrog sodium hlau los yog niobium pentoxide nrog txhuas hlau. Ntshiab niobium yog siv nyob rau hauv electron raj kom tshem tawm cov seem gases, thiab niobium doping nyob rau hauv cov hlau tuaj yeem txhim kho oxidation tsis kam ntawm cov hlau ntawm qhov kub thiab txias thiab txhim kho cov vuam zog ntawm cov hlau. Niobium kuj tseem siv rau hauv kev tsim cov cermets kub.

Cov ore tau los ntawm kev tsuas yog raug rau kev sib cais uas cais tantalum pentoxide (Ta2O5) thiab niobium pentoxide (Nb2O5) los ntawm lwm yam minerals.

Jean-Charles Galisa de Marinha tau tsim cov txheej txheem kev lag luam sib cais uas ua kom zoo dua qhov sib txawv ntawm cov dej solubility uas muaj fluoride complexes ntawm niobium thiab tantalum. Txoj kev tshiab ces siv cov organic hnyav zoo ib yam li cyclohexanone los rho cov tshuaj fluoride los ntawm cov kua aqueous, thiab tom qab ntawd dej kom rho tawm cov niobium thiab tantalum complexes cais los ntawm cov organic hnyav. Qhov sib ntxiv ntawm poov tshuaj fluoride precipitates niobium rau hauv cov poov tshuaj fluoride complex, thaum ntxiv ntawm ammonia precipitates niobium pentoxide.

Muaj ntau txoj hauv kev txo qis ntawm cov khoom sib txuas mus rau lub xeev hlau. Ib qho yog electrolysis ntawm molten sib tov ntawm K2 [NbOF5] thiab sodium chloride, thiab lwm yam yog txo cov niobium fluoride nrog sodium. Cov niobium hlau muab tau los ntawm txoj kev no muaj lub siab purity.

Raws li xyoo 2013, Brazilian Metallurgical thiab Mining Company Ltd. tswj 85% ntawm lub ntiaj teb niobium ntau lawm. Lub Tebchaws Asmeskas Geological Survey kwv yees tias niobium ntau lawm tau nce los ntawm 38,700 tons hauv 2005 txog 44,500 tons hauv 2006. Cov khoom lag luam thoob ntiaj teb ntawm cov khoom siv niobium kwv yees li ntawm 4.4 lab tons. Nyob nruab nrab ntawm 1995 thiab 2005, ntau lawm ntau dua ob npaug ntawm 17,800 tons, thiab ntawm 2009 thiab 2011, kev tsim khoom tseem nyob ruaj khov ntawm 63,{17}} tons hauv ib xyoos.