Tus coefficient ntawm thermal expansion yuav tsis zoo?

Cov txheej txheem:

Tus coefficient ntawm thermal expansion yuav tsis zoo?
Tus coefficient ntawm thermal expansion yuav tsis zoo?
Anonim

Thermal expansion is a fundamental property of solids. Txawm li cas los xij, txawm tias tsis tshua muaj, qee cov ntaub ntawv cog lus thaum cua sov nyob rau hauv lub siab tas li. Cov no yog negative thermal expansion (NTE) cov ntaub ntawv. Qhov tseeb, NTE tsis tuaj yeem piav qhia los ntawm cov txheej txheem ib txwm tau piav qhia saum toj no thiab yog ib qho kev tshawb fawb ntawm nws tus kheej.

Dab tsi muaj qhov tsis zoo thermal expansion?

Cov tshuaj uas qhia qhov tsis zoo thermal expansion (NTE) dhau qhov kub me me tau paub ntev. Piv txwv li, dejnthuav tawm qhov tsis zoo thermal expansion hla ntau ntawm ob peb degrees ze rau nws qhov chaw khov.

Tus coefficient ntawm ntim nthuav dav puas yog qhov tsis zoo?

Nws tau qhia tias Grüneisen tas li muab los ntawm cov khoom elastic ntawm cov khoom tuaj yeem ua rau tsis zoo hauv qee kis. Nyob rau hauv tag nrho cov no, lub ntim expansion coefficient ntawm cubic lattice yuav tsis zoo ntawm txaus qis kub. …

Vim li cas dej thiaj muaj qhov tsis zoo thermal expansion coefficient?

Kuv nkag siab tias muaj qhov tsis zoo thermal expansion coefficient txhais tau tias tsis yog cov khoom nthuav dav raws li nws ua kom sov nws cog lus, uas is Yuav ua li cas dej thiab kuv paub tias coefficient tsis zoo thaum kub qis dua 4 ∘C.

Dab tsi yog qhov zoo thermal expansion coefficient?

Qhov nruab nrab CTE raucoj mus muag ntshiab hlau yog 24 × 10-6/ K (13 × 10- 6/°F). Aluminium alloys raug cuam tshuam los ntawm kev muaj silicon thiab tooj liab, uas txo qhov nthuav dav, thiab magnesium, uas ua rau nws nce.

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