Cov ceev ceev ntom ntom yog hais txog qhov sib piv ntawm cov khoom loj ntawm cov khoom siv rau nws cov khoom ntim. Pom meej ntim yog qhov ntim tiag tiag ntxiv lub kaw pore ntim. Nws hais txog qhov sib piv ntawm qhov chaw nyob los ntawm cov khoom siv ntawm ib qho kev quab yuam sab nraud rau qhov loj ntawm cov khoom, feem ntau qhia nyob rau hauv phaus cubed) (kg / mp / mp / mp / mp / mp / mg / mg / mg / mg / mg / mg / mg / mg / mg / mg / mg / mg / mg / mg / mg. Nws tuaj yeem cuam tshuam lub porosity, hardness, elasticity thiab lwm yam khoom ntawm cov khoom siv. Rau cov ntaub ntawv nrog cov duab li ib txwm muaj, lub ntim tuaj yeem ntsuas ncaj qha; Rau cov ntaub ntawv nrog cov duab tsis xwm yeem, cov hws tuaj yeem muab ntim nrog cov ntaub qhwv caj dab, thiab tom qab ntawd lub ntim tuaj yeem ntsuas los ntawm kua. Qhov pom tseeb ceev feem ntau yog ntsuas nyob rau hauv lub xeev ntuj ntawm cov khoom, uas yog, lub xeev qhuav khaws cia hauv huab cua ntev. Txog cov roj hmab thiab cov ntaub ntawv rwb thaiv tsev yas ntawm cov roj hmab kaw rau roj hmab thiab cov yas sib txawv nrog qhov qis tshaj plaws nrog qhov qis tshaj thermal condality.
Siab porosity tuaj yeem insulate; Tab sis ceev heev dhau tuaj yeem yooj yim ua rau deformation thiab tawg. Nyob rau tib lub sijhawm, lub zog compression nce nrog kev nce hauv ntom ntom, kom ua rau lub sijhawm ntev ntawm cov khoom. Nyob rau hauv cov nqe lus ntawm thermal conductivity, qhov me dua lub ntom ntom, qis dua cov thermal conductivity thiab zoo dua cov rwb thaiv tsev thermal; Tab sis yog hais tias lub ntom ntom dhau lawm, hloov cua sov sab hauv thiab cov thermal rwb thaiv tsev nyhuv tsawg. Yog li ntawd, thaum xaiv cov ntaub ntawv thermal rwb thaiv tsev, nws yog qhov tsim nyog kom paub meej tias ntau yam khoom muaj ntau yam kom tau raws li cov kev xav tau ntawm cov kev pab sib txawv ntawm cov xwm txheej sib txawv.
Kev ntom ntom nti yog hais txog qhov ntom ntawm cov khoom nws tus kheej, uas yog, qhov sib piv ntawm qhov chaw nyob los ntawm ib qho khoom rau nws pawg. Hauv cov khoom siv hluav taws xob thermal rwb thaiv tsev, nws feem ntau yog hais txog qhov sib piv ntawm cov pore pore cua thiab qhov tseeb ntawm cov khoom siv peej nyob rau sab hauv thiab qhov tseeb ntawm cov kua mis ua kom huv si. Zoo ib yam li cov ceev ceev, kev ceev ceev kuj tseem muaj ib qho ntawm cov khoom siv hluav taws xob thermal, cov rwb thaiv tsev dej, thermal rwb thaiv tsev thiab lwm yam ntxwv ntawm cov khoom.
Yog li, txawm hais tias ob qho tib si pom ntom thiab bulk ntom txog qhov nthe thiab porosity ntawm cov ntaub ntawv rwb thaiv tsev, lawv muaj qee qhov sib txawv:
1. Cov ntsiab lus sib txawv
Cov khoom siv ceev ceev ntawm thermal rwb thaiv tsev cov khoom tsuas yog ntsuas cov khoom sib luag thiab elasticity thiab elasticity, thiab muaj peev xwm qhia txog kev sib raug zoo sib xws ntawm huab cua thiab qhov tseeb loj hauv cov khoom.
Kev ntom ntom nti yog hais txog qhov ntom ntom ntawm cov khoom siv rwb thaiv tsev nws tus kheej, thiab tsis koom nrog txhua cov khoom ntawm cov qauv sab hauv.
2. Cov kev suav sib txawv
Qhov pom tseeb pom ntawm cov ntaub ntawv rwb thaiv tsev feem ntau tau muab xam los ntawm kev ntsuas ceev kom ntsuas los ntawm kev ntsuas qhov hnyav ntawm cov khoom siv ntawm cov ntaub ntawv paub ntim.
3. Tej zaum yuav ua yuam kev
Txij li thaum suav cov ntsiab ntawm qhov pom tseeb ntawm cov khoom siv rwb thaiv tsev yog raws li cov qauv nyob ntawm cov qauv sib xyaw, nws tsis tuaj yeem sawv cev ntawm cov qauv txheej txheem tag nrho ntawm cov khoom. Nyob rau tib lub sijhawm, thaum muaj cov kab ke lossis txawv teb chaws lossis txawv teb chaws sab hauv cov khoom siv, cov kev suav ntawm cov ceev ceev kuj tseem yuav muaj qhov yuam kev. Kev ceev ceev tsis muaj cov teeb meem no thiab tuaj yeem yog qhov tseeb txog qhov ntom ntom thiab qhov hnyav ntawm cov khoom rwb thaiv tsev.
Kev ntsuas txuj ci
Kev tshem tawm txoj kev: rau cov ntaub ntawv nrog cov duab ib txwm muaj, lub ntim tuaj yeem ntsuas ncaj qha; Rau cov ntaub ntawv nrog cov duab tsis xwm yeem, lub qhov hws tuaj yeem muab ntim nrog cov qauv ciab seeded txoj kev, thiab tom qab ntawd lub ntim tuaj yeem ntsuas nrog txoj kev tshais chaw.
Pycnometer txoj kev: rau qee cov ntaub ntawv, xws li cov ntaub ntawv carbon, nrog cov roj ntsha ua tau siv los sau cov micrropores nrog helium mus txog thaum nws yog yuav luag tsis tau adsorbed.
Chaw thov
Pom zoo ntom ntom muaj ntau cov kev siv hauv cov ntaub ntawv kev tshawb fawb. Piv txwv li, hauv cov roj hmab hloov tau roj hmab thiab tshuaj txhuam yas ntsuas qhov ntsuas pom tseeb thiab ua kom pom tseeb tias nws cov cua sov ua kom tau raws cov qauv. Ib qho ntxiv, qhov ceev pom meej meej tseem siv los soj ntsuam cov khoom siv lub cev ntawm cov ntaub ntawv thiab cov ntaub ntawv ua tau zoo ntawm cov ntawv thov engineering.
Yog tias qhov ntom ntom thiab cov roj hmab thiab cov khoom siv yas ntxiv thiab cov thermal conductivy yuav nce ntxiv, tab sis cov thermal rwb thaiv tsev ua tau zoo zuj zus. Kingflex pom muaj kev pom kev zoo tag nrho hauv kev sib raug zoo ntawm thermal, lub zog ntub dej tsis muaj zog, qhov muag muaj zog ntub dej, uas yog, qhov zoo tshaj plaws ntom ntom.
Lub Sijhawm Post: Jan-18-2025
