(1) Qhov ntom ntom: Nws yog qhov tseem ceeb rau kev nthuav qhia thiab ntsuas qee lub khob iav.Nws tsis tsuas yog pab txiav txim qhov nruj thiab qhov porosity ntawm cov khoom ntim tshuaj, tab sis kuj tseem ceeb heev rau kev siv tshuaj thiab tus nqi-kev ua tau zoo thaum lub sij hawm tsim cov khoom ntim tshuaj.Cov tshuaj tshuaj iav lub raj mis uas tsis tshua muaj zog, lub teeb yuag thiab yooj yim ncig yog yooj yim los txhawb
(2) Hygroscopicity: yog hais txog kev ua haujlwm ntawm cov iav fwj kom nqus lossis tso cov dej noo ntawm huab cua hauv qee qhov chaw ruaj khov thiab av noo.Cov khoom ntim tshuaj hygroscopic tuaj yeem nqus dej noo hauv huab cua hauv qhov chaw ntub dej kom nws cov ntsiab lus noo noo;nyob rau hauv ib puag ncig qhuav, nws yuav tso dej noo thiab txo nws cov dej noo.Lub hygroscopicity ntawm cov khoom ntim tshuaj muaj qhov cuam tshuam zoo rau cov tshuaj ntim khoom.Qhov nqus dej noo thiab cov ntsiab lus dej ua lub luag haujlwm tseem ceeb hauv kev ua kom cov tshuaj zoo thiab tswj cov dej noo.
(3) Barrier khoom: yog hais txog cov khoom thaiv ntawm cov khoom ntim tshuaj rau huab cua (xws li oxygen, carbon dioxide, nitrogen, thiab lwm yam) thiab dej vapor, tau kawg, suav nrog cov khoom thaiv ntawm ultraviolet rays thiab tshav kub, uas tuaj yeem tiv thaiv. noo noo, lub teeb, thiab tshuaj tsw qab., Lub luag haujlwm ntawm kev tiv thaiv roj.Nws yog ib qho tseem ceeb heev rau kev ntim cov dej noo thiab cov tshuaj tsw qab, thiab cov khoom thaiv kev tiv thaiv yog ib qho tseem ceeb ntawm cov khoom ntim tshuaj.
(4) Thermal conductivity: yog hais txog kev hloov hluav taws xob ntawm cov iav fwj.Vim qhov sib txawv ntawm kev tsim los yog cov qauv ntawm cov khoom ntim tshuaj, cov thermal conductivity ntawm ntau cov khoom ntim tshuaj kuj sib txawv.
(5) Kev tiv thaiv kub thiab txias: yog hais txog kev ua haujlwm ntawm cov khoom ntim tshuaj kom tiv taus qhov kub thiab txias hloov yam tsis ua haujlwm.Qhov loj ntawm cov cua sov kuj nyob ntawm qhov sib piv ntawm cov khoom ntim tshuaj thiab qhov sib xws ntawm cov qauv.Feem ntau hais lus, rau cov khoom ntim tshuaj uas muaj cov qauv kub-resistant crystalline loj dua cov uas muaj cov qauv amorphous, qhov siab dua qhov melting point, qhov kub tsis kam.Lub tshav kub tsis kam ntawm cov tshuaj iav fwj yog qhov zoo dua, thiab cov cua sov ntawm cov yas yog qhov sib txawv.Cov iav kuj yuav tsum tau siv nyob rau hauv qhov kub thiab txias txias, xws li khov-qhuav hmoov txhaj tshuaj, uas yuav tsum tau iav fwj kom muaj qhov txias txias.
Post lub sij hawm: Sep-16-2022