Tantalum Physical Properties
Chemical cim Ta, steel grey hlau, belongs rau pawg VB nyob rau hauv lub sij hawm lub sij hawm ntawm
cov ntsiab lus, atomic tooj 73, atomic hnyav 180.9479, lub cev-centered cubic siv lead ua,
common valence yog +5.Lub hardness ntawm tantalum yog tsawg thiab muaj feem xyuam rau cov pa oxygen
cov ntsiab lus.Vickers hardness ntawm zoo tib yam ntshiab tantalum tsuas yog 140HV nyob rau hauv lub
annealed xeev.Nws cov ntsiab lus melting yog siab li 2995 ° C, nyob qib tsib ntawm cov
Cov khoom tseem ceeb tom qab carbon, tungsten, rhenium thiab osmium.Tantalum yog
malleable thiab tuaj yeem kos rau hauv nyias filaments kom nyias foils.Nws coefficient ntawm
thermal expansion yog me me.Nws tsuas yog nthuav tawm los ntawm 6.6 qhov chaw hauv ib lab ib degree Celsius.
Tsis tas li ntawd, nws qhov toughness yog qhov muaj zog heev, txawm tias zoo dua li tooj liab.
CAS Nr .: 7440-25-7
Element qeb: kev hloov hlau hlau.
kwv tij atomic mass: 180.94788 (12C = 12.0000)
Qhov ceev: 16650kg / m³;16.654 g / cm³
Hardness: 6.5
Qhov chaw: Lub voj voog thib rau, Pawg VB, Zone d
Cov tsos: Hlau Grey Metallic
Electron configuration: [Xe] 4f14 5d3 6s2
Atomic ntim: 10.90cm3 / mol
Cov ntsiab lus ntawm cov ntsiab lus hauv dej hiav txwv: 0.000002ppm
Cov ntsiab lus hauv crust: 1ppm
Oxidation xeev: +5 (loj), -3, -1, 0, +1, +2, +3
Crystal qauv: Chav tsev cell yog ib lub cev-centered cubic unit cell, thiab txhua chav cell
muaj 2 hlau atoms.
Cell parameters:
ib = 330.13 pm
b = 330.13 Nws
c = 330.13 Nws
AB = 90°
AB = 90°
γ = 90 °
Vickers hardness (arc melting thiab txias hardening): 230HV
Vickers hardness (recrystallization annealing): 140HV
Vickers hardness (tom qab ib tug electron beam melting): 70HV
Vickers hardness (melted los ntawm theem nrab electron nqaj): 45-55HV
Melting point: 2995 ° C
Kev nthuav tawm ceev ntawm lub suab hauv nws: 3400m / s
Ionization zog (kJ / mol)
M – M+ 761
M+ – M2+ 1500
M2+ – M3+ 2100
M3+ – M4+ 3200
M4+ – M5+ 4300
Tshawb nrhiav los ntawm: 1802 los ntawm Swedish chemist Anders Gustafa Eckberg.
Element naming: Ekberg hu ua lub caij tom qab Tantalus, leej txiv ntawm poj huab tais
Neobi ntawm Thebes nyob rau hauv ancient Greek mythology.
Source: Nws feem ntau muaj nyob rau hauv tantalite thiab coexists nrog niobium.
Post lub sij hawm: Jan-06-2023