Nyob rau hauv xyoo tsis ntev los no, lub thermal conductivity ntawm cov roj hmab khoom tau txais kev saib xyuas ntau. Thermally tiam cov roj hmab cov khoom lag luam tau siv nyob rau hauv cov teb ntawm aerospace, cov khoom siv hluav taws xob ua si lub luag haujlwm hauv kev ua kom sov, kev nqus hluav taws xob thiab kev poob siab thiab poob siab thiab poob siab thiab poob siab thiab poob siab thiab poob siab. Kev txhim kho ntawm thermal conductivity yog qhov tseem ceeb tshaj plaws rau kev ua haujlwm cov khoom siv roj hmab. Cov roj hmab muaj cov roj hmab muaj txiaj ntsig tau npaj los ntawm cov khoom siv hluav taws xob, uas yog qhov tseem ceeb ntawm kev txhim kho ntawm lawv txoj kev ntseeg tau thiab kev ncua ntawm lawv lub neej kev pabcuam.

Ntawm tam sim no, cov roj hmab cov ntaub ntawv siv hauv cov log tsheb yuav tsum muaj cov yam ntxwv ntawm cov cua kub tsawg thiab siab thermal conductivity. Ntawm ib sab tes, hauv cov log tsheb volcanization, cov roj cua hloov cua sov tau nce, lub zog siv hluav taws xob txo; Cov cua sov tsim tawm thaum lub sijhawm tsav tsheb txo cov ntsuas kub ntawm lub cev tuag thiab txo cov log tsheb ua rau muaj kev cuam tshuam los ntawm ntau dhau. Lub thermal conductivity ntawm thermally coj cov roj hmab yog feem ntau txiav txim siab los ntawm cov roj hmab loj thiab cov khoom siv thermally. Lub thermal conductivity ntawm ob qho hais lossis cov fibrous thermal conder carteive muab ntau dua li ntawm cov roj hmab loj.

Feem ntau siv cov floally ua cov fillers yog cov ntaub ntawv hauv qab no:

1. Cubic Beta Phase Nano Silicon Carbide (Sic)

Nano-nplai silicon carbide hmoov cov ntaub ntawv sib txuas cov cua sov, thiab yooj yim heev txhim kho cov khoom cua sov uas tsis muaj kev txo cov khoom siv sib xyaw cov khoom siv tshuab.

Lub thermal conductivity ntawm silicon carbide epoxy composite muaj cov khoom muaj nyob rau hauv cov khoom siv sib xyaw ua ke zoo heev thaum tus nqi tsawg. Lub zog ntawm qhov zoo thiab cuam tshuam lub zog ntawm silicon carbide epoxy Composite thiab tom qab ntawd txo qis ntawm cov nyiaj ntawm silicon. Cov kev hloov kho saum npoo ntawm silicon muaj peev xwm txhim kho cov thermal conductivity thiab cov khoom siv mechanies ntawm cov khoom sib xyaw.

Silicon Carbide muaj cov tshuaj lom neeg muaj zog, nws cov thermal conductivies zoo dua li lwm cov thermalonduction tseem ceeb tshaj li ntawm cov hlau ntawm chav tsev kub. Cov kws tshawb fawb los ntawm Beijing University of Beijing University of Bermal conductivity ntawm Alumina thiab Silicon Carbide Reinfourced silicone roj hmab. Cov txiaj ntsig qhia tau hais tias cov thermal conductivity ntawm silicone roj hmab nce raws li tus nqi ntawm silicon carbide nce; Thaum tus nqi ntawm silicon carbide yog tib yam, lub thermal conductived ntawm cov roj hmab me me silicone silicon carbide reawced silicone roj hmab; Lub thermal conductivity ntawm silicon roj hmab pab nrog silicon carbide zoo dua li ntawm alumina txhawb cov roj hmab silicon. Thaum cov pawg piv ntawm Alumina / Silicon Carbide yog 8/2 thiab tag nrho cov nyiaj yog 600 qhov chaw, lub thermal conductivity ntawm silicon roj hmab yog qhov zoo tshaj plaws.

2. Aluminium Nitride (Aln)

Aluminium Nitride yog ib qho atomic crystal thiab belongs rau pob zeb diamond nitride. Nws tuaj yeem muaj nyob ntawm qhov kub ntawm 2200 ℃. Nws muaj zoo thermal conductivity thiab tsawg thermal nthuav kev coefficient, ua nws ib qho zoo thermal cov khoom siv zoo. Lub thermal conductivity ntawm aluminium nitride yog 320 W · (,4, uas nyob ze rau cov thermal condivity ntawm boron oxide, thiab yog ntau tshaj 5 lub sij hawm loj dua li ntawm alumina. Cov kws tshawb fawb los ntawm Qingdao University of Science thiab Technology tau kawm cov thermal conductivity ntawm Aluminium Nitride Reinites Reinites. Cov txiaj ntsig qhia tau tias: Raws li tus nqi ntawm aluminium nitride nce, thermal conductivity ntawm cov khoom siv sib xyaw; Lub thermal conductivity ntawm cov khoom siv sib dhos uas tsis muaj aluminium nitride yog 0.26, thaum tus nqi ntawm cov khoom siv hluav taws xob nce mus txog 0.442, nce 70%.

3. Nano alumina (Al2o3)

Alumina yog ib hom fultifunctional inorganic muab tub lim, uas muaj loj thermal conductivity, dielectric tas li thiab zoo hnav tsis kam. Nws yog dav siv hauv cov khoom siv roj hmab.

Cov kws tshawb fawb los ntawm Beijing University cov tshuaj thev naus laus zis siv cov thermal conductivity ntawm nano-alumina / carbon nanotube / ntuj roj hmab muaj composites. Cov txiaj ntsig qhia tau hais tias kev sib xyaw ua ke ntawm nano-alumina thiab carbon nanotubes muaj cov nyhuv synapices los txhim kho cov thermal conductivity ntawm cov khoom siv hluav taws xob; Thaum tus nqi ntawm cov pa roj carbon nanotubes yog tas li, lub thermal conductivity ntawm cov khoom siv sib xyaw ua kom nce linearly nrog nce ntawm tus nqi ntawm nano-alumina; Thaum 100 thaum siv nano-alumina raws li cov muab cov khoom siv thermally ua ke, cov thermal conductivity ntawm cov khoom siv sib xyaw ua kom nce los ntawm 120%. Thaum muaj 5 qhov chaw ntawm cov nanotubes tau siv ua cov muab cov khoom siv thermally ua ke, lub thermal conductivity ntawm cov khoom siv sib xyaw ua kom nce los ntawm 23%. Thaum twg 100 feem ntawm alumina thiab 5 seem yog siv thaum cov pa roj carbon nanotubes tau siv ua cov khoom siv thermally ntawm cov khoom siv sib xyaw ua ke los ntawm 155%. Qhov kev sim ua ke kuj kos ob qho kev txiav txim siab nram qab no: Ua ntej, thaum muaj cov neeg siv roj carbon monoxide tas li, thiab qhov poob ntawm cov khoom siv hluav taws xob nce ntxiv. Thaum 100 qhov chaw ntawm nano-alumina thiab 3 feem ntawm cov pa roj carbon nanotubes tau siv ua ke ntawm cov khoom siv sib xyaw ua ke ntawm cov khoom siv sib xyaw yog tsuas yog 12 ℃, thiab cov kws kho tshuab hluav taws xob zoo heev; Thib ob, thaum tus nqi ntawm cov pa roj carbon nanotubes yog tsau, raws li tus nqi ntawm cov khoom siv sib xyaw ua kom nce ntxiv, thaum lub zog tensile thiab elongation thaum tawg zuj zus.

4. Cov Nanotube

Cov Nanotubes muaj cov khoom siv lub cev zoo heev, thermal conductivity thiab hluav taws xob conductivity, thiab yog cov kev txhawb nqa zoo tagnrho. Lawv cov khoom siv roj hmab ntxiv tau txais kev saib xyuas dav dav. Cov Nanotubes yog tsim los ntawm curling txheej txheej ntawm graphite daim ntawv. Lawv yog hom tshiab graphite cov khoom siv nrog lub cylindrical qauv nrog lub cheeb ntawm kaum ntawm nanometers (10-30nm, 30-60nm, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-60NM, 60-100nm). Lub thermal conductivity ntawm cov pa roj carbon nanotubes yog 3000 Win · (,1, uas yog 5 zaug ntawm thermal conductivity ntawm tooj liab. Cov Nanotubes tuaj yeem txhim kho lub thermal conductivity, thiab cov khoom siv hluav taws xob zoo dua li cov roj hmab dub, carbon fiber thiab iav fiber ntau. Cov kws tshawb fawb los ntawm Qingdao University of Science thiab Technology ua kev tshawb fawb ntawm Thermal conductivity / EPDM sib xyaw cov ntaub ntawv. Cov txiaj ntsig qhia tau tias: Cov pa roj carbon nanotubes tuaj yeem txhim kho lub thermal conductivity thiab lub cev ntawm cov khoom siv sib xyaw; Raws li tus nqi ntawm cov pa roj carbon nanotubes nce, thiab elongation ntawm kev ntxhov siab thawj zaug thiab tom qab ntawd txo qis, lub zog zuj zus; Thaum tus nqi ntawm cov pa roj carbon nanotubes yog me me, cov kab uas hla roj ntau dua los ua cov saw hlau yooj yim dua li cov pa roj carbon me me, thiab lawv tau zoo dua nrog cov roj hmab loj.