Cov khoom ntawm Niobium

Cov khoom tshwj xeeb ntawm niobium ua rau nws muaj txiaj ntsig rau ntau daim ntawv thov sib txawv hauv ntau qhov kev lag luam. Alloying lossis plating niobium nrog lwm cov hlau tuaj yeem txhim kho ntau yam ntawm cov khoom no.

Niobium yog ntau yam hlau vim tias koj tuaj yeem ua kom nws muaj zog thiab hloov tau ntau txoj hauv kev. Nyob rau hauv nws daim ntawv ntshiab, nws yog mos thiab ductile. Nws muaj Mohs hardness ntawm rau.

Zoo li lwm yam hlau refractory, niobium khaws nws lub zog thiab hardness ntawm qhov kub thiab txias. Nws melting point yog 2,477 degrees Celsius los yog 4,490 degrees Fahrenheit. Nws qhov kub kub yog 4,744 degrees Celsius lossis 8,571 degrees Fahrenheit.

Niobium muaj qhov ntom ntom thiab thermal neutron hla ntu dua li cov hlau refractory. Nws qhov ceev ntawm 20 degrees Celsius yog 8.57 grams ib cubic centimeter.

Niobium yog ib tug conductor ntawm hluav taws xob. Nws conductivity yog 6.7 x 10 6 Siemens ib 'meter'. Thaum tsis kub, nws muaj superconducting zog.

Txhawm rau txhim kho cov khoom refractory ntawm niobium yam tsis ntxiv qhov hnyav, koj tuaj yeem sib xyaw nrog ntau yam hlau xws li npib tsib xee, hlau thiab cobalt. Niobium alloys feem ntau muaj zog heev.

Niobium muaj kev tiv thaiv corrosion zoo heev tab sis nyiam oxidize sai ntawm qhov kub ntawm 400 degrees Celsius lossis 750 degrees Fahrenheit. Cov oxide zaj duab xis ua rau nws tiv taus corrosion. Plating nws nrog lwm cov hlau tuaj yeem pab ua kom nws tiv taus oxidation. Nws kuj reacts nrog carbon, nitrogen, sulfur thiab halogens.

Nyob rau hauv chav tsev kub, nws yog inert rau acids, txawm aqua regia, thiab nws muaj zog txaus kom yaj kub thiab platinum. Txawm li cas los xij, nws tuaj yeem raug tawm tsam los ntawm kub concentrated acids, tshwj xeeb tshaj yog hauv paus thiab oxidizers.