Kodak sib tham txog 6 qhov kev ceeb toom loj tshaj plaws rau kev siv lub chaw kuaj dej cryogenic txhua hnub
txoj haujlwm ua haujlwm
Raws li lub hom phiaj ntawm kev siv, ntau hom kev ntsuas kub tau tsim thiab tsim ua. Lub hauv paus tsim: electrothermal qhov kub thawm niaj thawm niaj thawm siv cov khoom, kua, nkev hauv qab ntawm kev kub thiab thermal expansion thiab contraction phenomenon; nyob rau hauv cov dej tsis tu ncua, cov pa roj carbon (lossis vapor siab hloov vim muaj qhov sib txawv ntawm cov kub; thermoelectric effect; hloov ua haujlwm nrog cov kev hloov hauv kub;
Feem ntau, txhua yam khoom ntawm txhua yam khoom, tsuas yog thaum nws hloov pauv thiab ho muaj kev hloov hauv qhov kub thiab txias, tuaj yeem siv los kos rau qhov kub thiab ua kom tus pas ntsuas kub.
Siv thiab cais
Nrog rau kev paub txog science thiab technology thiab cov kev xav tau ntawm kev lag luam niaj hnub, kev ntsuas kev ntsuas kub tau ua tau zoo zuj zus lawm thiab zoo tuaj. Vim tias muaj ntau qhov kev kub siab, nce raws li qhov yuav tsum tau muaj, lawv kuj ua cov ntsuas kub txawv. Nov yog qee yam ntawm lawv.
1, tus pas ntsuas kub: siv ntau dua hydrogen lossis helium raws li kev ntsuas kub, fais thermostatic blast cub vim tias hydrogen thiab helium liquefaction yog kub tsawg, ze li ntawm zero, yog li nws qhov kub ntau yog qhov dav. Hom kab mob no zoo tshaj plaws thiab siv rau kev ntsuas ntau.
2, kuj thermometer: Muab faib ua tus pas ntsuas kub thiab cov thermometer, uas yog ua raws li tus yam ntxwv ntawm kev hloov pauv nrog qhov kub ua ntawm qhov kev ua no. Cov thermometers hlau yog siv rau platinum, kub, tooj liab, xee npe thiab lwm yam ntshiab hlau thiab ferronickel, phosphor alloy bronze; semiconductor thermometers feem ntau yog siv cov roj, germanium thiab lwm yam. Kev ntsuas tus pas ntsuas tau yooj yim siv thiab tau siv dav. Qhov ntsuas ntau yog nyob ib ncig ntawm -260 ° C mus txog 600 ° C.