I. Aluminium vs. Pob zeb diamond
Nrog rau qhov tshwm sim ntawm AI xam lub zog lub sijhawm, cov txheej txheem thermal conduction thiab dissipation kev daws teeb meem sai sai yuav tsum tau kov yeej cov fwj dej -Metallic aluminium muaj thermal conductivity ntawm kwv yees li 240 W / (m·K), ntau dua li cov ntaub ntawv ceramic. Spherical aluminium hmoov tuaj yeem siv los ua cov khoom ntim rau hauv cov roj thermal, cov ntaub ntawv thermal, lossis theem - hloov cov ntaub ntawv, siv cov chips thiab hlau kub dab dej hauv cov xwm txheej uas tsis tas yuav muaj hluav taws xob rwb thaiv tsev lossis tuaj yeem ua tiav los ntawm kev tsim qauv. Pob zeb diamond, ntawm qhov tod tes, sawv tawm vim nws qhov tshwj xeeb thermal conductivity (kwv yees li 2000 W / (m·K) rau ib qho crystals ntawm chav tsev kub) thiab qis coefficient ntawm thermal expansion (CTE). Nws tsis yog tsuas yog suav tias yog kev tshawb fawb tseem ceeb xwb tab sis kuj tau tsim thiab siv ntau yam khoom, suav nrog tooj liab (aluminium) / pob zeb diamond composites, silicon carbide / pob zeb diamond composites, CVD nyias- cov ntaub ntawv zaj duab xis, nanoparticle coatings, thiab TIM cov ntaub ntawv nrog pob zeb diamond micro hmoov.
II. Teeb meem tsom xam thiab kev daws teeb meem
Kev taw qhia rau tus qauv "R=BLT / (λ × A)" yog xav tau. Ntawm no, R sawv cev rau kev tiv thaiv thermal, BLT (Bond Line Thickness) yog daim ntawv cog lus kab tuab, λ yog thermal conductivity ntawm cov khoom, thiab A yog qhov chaw sib cuag. Cov mis no intuitively qhia tau hais tias thermal kuj, raws li ib qho kev ntsuas ntawm ib yam khoom lub peev xwm los impede tshav kub txaus, yog inversely proportional rau thermal conductivity. BLT tuaj yeem nkag siab yooj yim raws li qhov ntev ntawm txoj kev tshav kub, uas yog ncaj qha proportional rau thermal kuj thiab yog li inversely proportional rau thermal conductivity.
Undoubtedly, pob zeb diamond muaj thermal conductivity λ dua li txhuas. Txawm li cas los xij, hauv kev xyaum, "qhov tseem ceeb nce hauv viscosity ntawm silicone roj txwv qhov ntim ntawm pob zeb diamond hmoov." Cov kws tshawb fawb, engineers, thiab cov kws tshaj lij hauv kev lag luam hmoov yeej paub txog cov kev cov nyom uas koj Liu ntsib. Cov kev daws teeb meem muaj xws li:
1, Kev kho deg txheej los txo qhov kev sib cuam tshuam thiab txhim kho kev sib raug zoo ntawm cov muab tub lim thiab cov matrix, hais txog cov teeb meem zoo li lub zog saum npoo av ua rau yooj yim agglomeration.
2, Kho particle morphology thiab particle loj tis. Spherical los yog spheroidal hmoov muab zoo fluidity thiab qis viscosity. Combining particles of different sizes allows smaller particles to fill the gaps between larger ones, forming a denser and more efficient thermally conductive network with the same or even lower total volume fraction.
3, optimizing cov txheej txheem dispersion los yog siv additives los xyuas kom meej cov muab tub lim hmoov yog tag nrho thiab tusyees dispersed, zam lub zos discontinuities uas yuav cuam tshuam tag nrho cov kev ua tau zoo.
Tshaj li cov txheej txheem no, kev tsim kho thiab kev ua kom zoo ntawm cov qauv thermally conductive koom nrog ntau txoj kev xaiv cov khoom siv thiab kev sib xyaw ua ke. Piv txwv li, ib qho - cov khoom siv lead ua loj loj muaj lub qhov dej - xaj cov qauv uas yuav luag tsis muaj qhov tsis zoo ntawm cov ciam teb, txo cov phonon tawg thiab tso cua sov kom tsis txhob cuam tshuam los ntawm siv lead ua lattice. Lwm qhov piv txwv yog polyhedral particles, uas tuaj yeem ua tiav "lub ntsej muag-rau- ntsej muag sib cuag" ntawm cov dav hlau siv lead ua, uas tsis yog "point-to-} taw tes sib cuag" ntawm cov duab kheej kheej, ua rau kom qhov kub hloov chaw. Tsis tas li ntawd, ntau-cov khoom siv lossis ntau- kev sib koom ua ke ntawm morphology tuaj yeem siv tau, xws li siv cov flakes lossis rods (nrog rau qhov sib piv siab) ua los ntawm cov khoom qub lossis cov khoom sib txawv los tsim cov kev sib txuas zoo thermally conductive.