Cov yam ntxwv ntawm cov khoom siv rwb thaiv tsev

Cov khoom siv rwb thaiv tsev cov khoom siv thiab cov raj xa dej tau raug thaiv, siv cov ntsuas cua sov thiab cov khoom siv aerogels tau xub thov rau cov cua sov rwb thaiv tsev ntawm qhov chaw tsim los ntawm NASA. Nws muaj cov yam ntxwv ntawm kev ua kom muaj cua sov tsawg, ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntaws tuaj yeem ua kom zoo, nws muaj cov yam ntxwv ntawm cov thermal conductivity tsawg, tsis ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntaws Nws cov cua sov ua kom sov ntawm chav sov yog 0.018W/(K · m) thiab nws tsis muaj dej tsis txaus, thiab nws cov rwb thaiv tsev ua haujlwm tau zoo yog 3-8 npaug ntawm cov khoom siv ib txwm muaj.

Cov rwb thaiv tsev rwb thaiv tsev muaj cov yam ntxwv ntawm cov thermal conductivity tsawg, qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom tau zoo tuaj yeem ua rau muaj qhov tsis zoo ntawm cov khoom siv hluav taws xob, kev tiv thaiv ib puag ncig, kev tiv thaiv ib puag ncig thiab kev tiv thaiv ib puag ncig.

Lub cev hnyav, feem ntau 10-96kg/m3, 20kg/m3 lossis tsawg dua yog hnov, 24-48kg/m3 yog lub rooj tsav xwm nruab nrab, 48-96kg/m3 yog lub rooj tsav nyuaj, uas 48kg/m³ tuaj yeem siv ua lub qab nthab, nrog qhov ua kom muag muag ntawm 500 ° C Nyob ib puag ncig 300 ° C, cov nyiaj siv hauv Tebchaws Meskas loj dua, k=0.9.

Calcium silicate rwb thaiv tsev cov khoom lag luam tau tsim tiav hauv xyoo 1970 hauv Suav teb. Lawv muaj cov yam ntxwv ntawm kev sib zog ua kom siab, tsis muaj cua sov ua kom sov, tsim kho yooj yim thiab rov siv dua, thiab tau siv dav hauv cov tshuab fais fab.

Feem ntau ntawm kev tsim khoom hauv tsev feem ntau yog hauv kev cob qhia me me, thiab tom qab ntawd plaub kab kev tsim khoom tau tshaj tawm los ntawm Tebchaws Meskas, nrog cov cuab yeej siv siab dua, siv cov tshuab fiber ntau tam sim, rab koob qhuav zoo, ruaj khov, thiab tiv taus kub ntawm 800-1250 ° C.

Nta: Cov kua qaub los ntawm qhov siab tshaj 2.0, tiv taus qhov kub thiab txias, thiab cov raj xa dej dav dav yog ntau dua 1000 ° C. Cov khoom siv no yuav tsum tau siv. Qhov kub yaj yog kwv yees li 2000 ° C.

Cov khoom tseem ceeb yog polystyrene ua npuas ncauj thiab polyurethane ua npuas ncauj, tab sis muaj teeb meem nrog daim ntawv thov hauv kev tsim kho. Nws yog feem ntau siv rau cov hlau mesh nyuaj vaj huam sib luag thiab xim hlau sib xyaw nyuaj nyuaj vaj huam sib luag. Txawm hais tias muaj qee qhov kev txwv, lawv tau txhim kho sai. Raws li kev tsim hluav taws tiv thaiv kev xav tau rau cov khoom siv tau nruj thiab nruj dua, cov teeb meem tshiab tau thov rau kev siv cov khoom siv no.

Cov ntaub ntawv rwb thaiv tsev tuaj yeem khaws cov cua sov ntau dhau thiab tso tawm kom ruaj khov raws sijhawm. Cov kev hloov pauv gradient me me, uas ua rau txo qhov poob. Chav sov tuaj yeem hloov pauv thiab lub caij ntuj no rwb thaiv tsev tuaj yeem ua lub luag haujlwm zoo. Hauv kev kho kom zoo nkauj ntawm lub tsev tshiab thiab kho dua tshiab ntawm lub tsev qub, nws kov yeej qhov tsis xws luag xws li phab ntsa tawg, hws, kab mob, ua paug, thiab lwm yam; thiab nws muaj kev nyab xeeb thiab ntseeg tau rau kev sib koom nrog lub hauv paus tag nrho, nrog kev ua haujlwm tsis zoo, tsis muaj kab noj hniav, thiab zam kev tsis zoo cua siab los kua muag thiab ntog tawm. Nws tuaj yeem kov yeej cov teeb meem ntawm sab tav tom qab lub vaj huam sib luag sib txuas, thiab cov ces kaum sab nrauv ntawm cov ces kaum sab nrauv tsis zoo thiab cov vuas ntog tawm. Cov organic teeb meem hauv cov khoom cuam tshuam nrog cov kua qaub dawb uas muaj nyob hauv cov phab ntsa tseem ceeb tsim los ua ib qho kev sib xyaw, uas nkag mus rau hauv micropores ntawm phab ntsa tseem ceeb los tsim zej zog, ua kom qhuav nplaum, thiab txhim kho ntub ntub cov ntaub ntawv khaws cia, nrog zoo heev nplaum.