Thaum tshav kub kub-Resistant yog Tantalum li cas?

Tantalum (Ta)yog ib qho kub-resistant heevrefractory hlau.

Cov ntaub ntawv tseem ceeb Thermal rau Tantalum

Khoom	Tus nqi
Melting point	3017℃(5463℃F) - 5th siab tshaj ntawm tag nrho cov hlau
Boiling point	~ 5458 degree
Max nruam siv temp	~ 2000℃(hauv lub tshuab nqus tsev / inert); qis hauv huab cua vim tsim oxide
Thermal conductivity	~ 57 W / (m·K) (zoo rau cov hlau refractory)
Coefficient ntawm thermal expansion	6.3 × 10⁻⁶ / K (tsawg, zoo seem stability)
Tshwj xeeb kub	~0.14 J/(g·K)

Thaum tshav kub kub Resistance Details

Oxidation hauv huab cua:Cov txheej txheem tiv thaiv Ta₂O₅, tab sis siab dua ~ 300-400℃hauv huab cua, oxidation nrawm thiab tuaj yeem ua rau embrittlement. Nyob rau hauv ib puag ncig uas muaj oxygen, max nyab xeeb temp poob qis heev.

Hauv lub tshuab nqus tsev lossis inert gas:Nws tuaj yeem siv tsis tu ncua nyob ze 2000℃yam tsis muaj kev puas tsuaj loj.

Corrosion kuj:Cov tshuaj tiv thaiv siab heev (tshwj tsis yog HF thiab kub siab H₂SO₄ / HNO₃ sib tov).

Mechanical zog:Khaws lub zog rau qhov kub thiab txias zoo dua li ntau cov hlau.

Daim ntawv thov ntsig txog Kev Tiv Thaiv Kub

Cov khoom siv hluav taws xob kub kub (cov khoom cua sov, crucibles hauv cov xwm txheej tshwj xeeb).

Aerospace & nuclear industries (kub tiv thaiv, capacitors).

Chemical processing hlab ntsha rau corrosive/kub kua.

Kev sib piv nrog lwm cov hlau refractory:

Hlau	Melting Point (zeeg)	Max Siv Temp (Air)	Max Siv Temp (Nqus Tsev)
Tungsten	3422	~ 600 (tsuas yog oxidation)	~3400
Rhenium	3186	~800	~3100
Tantalum	3017	~400	~2000
Molybdenum	2623	~400	~2600
Niobium	2477	~300	~2200

Cov ntsiab lus

Qhov kub siab tshaj plaws crucible: Tungsten(~ 3400℃hauv lub tshuab nqus tsev / inert), ua raws li graphite (~ 3000℃hauv inert). Hauv huab cua, alumina / zirconia yog cov kev xaiv saum toj kawg nkaus (~ 1800-2000 degree).

Tantalum kub kuj: Cov ntsiab lus melting siab heev (3017 degree), zoo heev zog tuav ntawm siab T, tab sis txwv nyob rau hauv huab cua los ntawm oxidation - zoo tshaj plaws siv nyob rau hauv lub nqus tsev vacuum / inert hauv qab no ~ 2000 degree.

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