Dab tsi yog sublimation txheej txheem?
Dab tsi yog sublimation txheej txheem?

Video: Dab tsi yog sublimation txheej txheem?

Video: Dab tsi yog sublimation txheej txheem?
Video: Customized Adhesive daim kab xev, cov khoom siv rau cov khoom siv hauv qab, tiv thaiv plua plav dai 2024, Kaum ib hlis
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Sublimation yog a txheej txheem siv los ntawm chemists los purify compounds. Ib qho khoom yog feem ntau muab tso rau hauv a sublimation apparatus thiab rhuab nyob rau hauv lub tshuab nqus tsev vacuum. Nyob rau hauv qhov kev txo qis no, cov khoom volatilizes thiab condenses raws li ib tug purified compound ntawm ib tug txias nto (txias ntiv tes), tawm hauv ib tug tsis-volatile residue ntawm impurities qab.

Kuj paub yog, dab tsi yog sublimation thiab piv txwv?

Sublimation yog ib qho kev hloov pauv tshwj xeeb ntawm lub xeev thaum cov khoom siv hla cov kua theem thiab txav ncaj qha mus rau theem roj. Qhov no tshwm sim vim hais tias cov tshuaj absorbs zog sai heev los ntawm ib puag ncig uas melting yeej tsis tshwm sim. Piv txwv ntawm Sublimation : 1. "Dry ice" los yog cov khoom carbon dioxide sublimes.

Tsis tas li ntawd, thaum twg koj tuaj yeem siv txoj kev sublimation? Cov sublimation txheej txheem tuaj yeem tsuas yog siv rau ntawm 100% polyester cov ntaub ntawv los yog cov ntaub ntawv nrog ib tug tshwj xeeb polymer txheej. Sublimation yog qhov zoo tshaj plaws rau cov ntaub dawb los yog lub teeb xim. Qhov no yuav zoo li qhov kev xaiv tsawg, tab sis cov khoom siv polymer coated ua tau muaj xws li coasters, mugs, nas ncoo thiab lwm yam.

Ib tug kuj yuav nug, vim li cas sublimation tshwm sim?

Sublimation tshwm sim thaum tag nrho cov siab ntawm cov cua yog tsawg tshaj li lub vapor siab ntawm compound, thiab melting tseem tsis tau tshwm sim vim nws tsis kub txaus. Cov tebchaw sib txawv muaj qhov sib txawv vapor pressures. Melting kub yog tsim rau hauv ib yam khoom. Nws tsuas yog nyob ntawm lub ntiaj teb sab nraud xwb.

Dab tsi yog qhov piv txwv zoo ntawm sublimation?

Los ntawm sublimation , ib yam khoom hloov ntawm cov khoom mus rau ib qho roj yam tsis tau dhau los ntawm cov kua theem. Cov dej khov qhuav, cov khoom CO2, muab qhov sib txawv piv txwv ntawm sublimation . Nws tseem ua tau rau dej khov rau sublimate , txawm hais tias nws xav tau ib puag ncig huab cua tshwj xeeb thiab qhov siab siab.

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