High thermal conductivity cov ntaub ntawv

Taw qhia

High thermal conductivity cov ntaub ntawv tseem ceeb heev nyob rau hauv niaj hnub engineering ntiaj teb no. Koj pom lawv nyob txhua qhov chaw-hauv cov khoom siv hluav taws xob, tsheb, lub zog hluav taws xob, thiab txhua yam ntawm cov tshuab ua haujlwm. Yeej, thermal conductivity yog qhov zoo npaum li cas cov khoom txav cua sov los ntawm ib qho chaw mus rau lwm qhov, feem ntau ntsuas hauv watts ib 'meter' -kelvin (W/m·K).

Yog tias cov khoom hloov cua sov sai, nws yuav pab kom cov khoom txias thiab ua haujlwm zoo. Tias yog vim li cas tooj liab thiab txhuas thiaj li nrov; lawv ua hauj lwm zoo, thiab lawv tsis tawg lub txhab nyiaj. Tab sis thaum koj xav tau thawb kev ua tau zoo ntxiv, muaj cov kev xaiv siab heev xws li pob zeb diamond thiab graphite.

Piv txwv li, pob zeb diamond tshuab feem ntau cov hlau tawm hauv dej nrog thermal conductivity ntawm 1000 thiab 2200 W / m·K. Yog li, paub tias cov ntaub ntawv twg ua dab tsi ua rau nws yooj yim dua los xaiv qhov zoo rau cov dab dej kub thiab lwm cov tshuab cua txias.

Aluminium Heat Sinks

Kev faib tawm ntawm cov khoom siv thermal conductivity siab
 

Thaum nws los txog rau cov ntaub ntawv uas txav cua sov zoo, koj tau txais plaub pawg tseem ceeb: hlau, ceramics, carbon-raws li cov khoom, thiab cov khoom sib xyaw. Cov hlau yog qhov mus rau- rau feem ntau kev lag luam vim lawv tsis yog qhov zoo ntawm kev ua cua sov- lawv kuj zoo nkauj yooj yim rau kev tsim thiab ua haujlwm nrog. Nyiaj thiab tooj liab yog nyob rau sab saum toj ntawm daim ntawv, nrog nyiaj ntawm 429 W / m·K thiab tooj liab nyob tom qab ntawm 401. Txhuas tsis nyob deb li cas, ntawm 237. Ceramics xws li txhuas nitride thiab silicon carbide rub ob lub luag hauj lwm -lawv tuav cov cua kub zoo thiab rwb thaiv tsev tiv thaiv hluav taws xob, uas ua rau lawv zoo meej rau cov hluav taws xob.

Tam sim no, cov khoom siv carbon-raws li yog hom ntawm lawv tus kheej. Xav txog graphite thiab pob zeb diamond. Graphite tuaj yeem ntaus ib ncig ntawm 150 W / m·K, tab sis pob zeb diamond tawm txhua yam hauv cov plua plav nrog nws qhov kev ua tau zoo. Tom qab ntawd koj tau txais cov khoom sib xyaw, xws li tooj liab - pob zeb diamond lossis aluminium -graphite. Cov kev sib xyaw no tau dhau los ua neeg nyiam dua vim tias lawv cia cov kws ua haujlwm tweak ob qho tib si thermal thiab mechanical zoo kom haum rau qhov lawv xav tau. Thaum kawg, nws yog txhua yam hais txog kev xaiv cov khoom tsim nyog rau txoj haujlwm- ntsuas cov khoom xws li tus nqi, qhov hnyav, kev coj ua, thiab nws yooj yim npaum li cas los ua ib feem.

Cov khoom tseem ceeb thiab cov yam ntxwv ua tau zoo
 

Cov ntaub ntawv thermal conductivity tsis yog nyob ntawm lawv tus lej conductivity xwb. Muaj ntau qhov sib xyaw ua ke ntawm qhov ua si-thermal diffusivity, ntom ntom, tshwj xeeb tshav kub, thiab txawm tias ntau npaum li cas cov khoom nthuav dav nrog cua sov, txhua yam teeb meem hauv lub neej tiag tiag. Cov hlau txav cua sov nyob ib puag ncig feem ntau nrog lawv cov hluav taws xob dawb, thaum tsis yog- cov hlau zoo li pob zeb diamond siv kev co hauv lawv cov lattice, hu ua phonons. Qhov no yog vim li cas pob zeb diamond tuaj yeem yog cov hluav taws xob hluav taws xob tab sis tseem muaj cov thermal conductivity zoo kawg.

Lwm yam uas yuav tsum nco ntsoov: qee cov ntaub ntawv yog anisotropic. Siv graphite, piv txwv li - nws cov thermal conductivity hloov nyob ntawm seb koj ntsuas qhov kev taw qhia. Tom qab ntawd muaj qhov nto tiav, purity, thiab kub; tag nrho cov no tuaj yeem hloov kev ua haujlwm. Yog hais tias koj qhia impurities los yog tsis xws luag, koj yuav pom ib tug poob rau hauv conductivity yuav luag tam sim ntawd.

Engineers kuj saib seb cov ntaub ntawv ua si ua ke li cas. Yog tias koj tab tom ua haujlwm nrog cov tshuab ua kom sov thiab txias ntau, qhov sib txawv ntawm thermal expansion tuaj yeem ua rau cov neeg kho tshuab kev nyuaj siab- lossis tseem ua rau tej yam tsis zoo. Yog li, nws yog ib qho kev sib npaug tiag tiag, tsis yog tus lej ua si xwb.

Copper Heat Sinks

Cov ntawv thov hauv Modern Industries
 

Cov ntaub ntawv thermal conductivity ua lub luag haujlwm loj hauv txhua hom kev lag luam. Siv cov khoom siv hluav taws xob, piv txwv li -cov dab dej kub, cov ntaub qhwv lub thermal, thiab cov tshuab ua kom txias rau CPUs thiab GPUs txhua tus nyob ntawm cov ntaub ntawv no kom ua haujlwm zoo. Tooj thiab txhuas yog nyob txhua qhov chaw ntawm no. Lawv pheej yig, yooj yim rau kev ua haujlwm nrog, thiab lawv tau ua haujlwm tiav.

Thaum koj saib lub zog tauj dua tshiab, zoo li hnub ci inverters lossis roj teeb cia, txav cua sov kom nrawm yog qhov tseem ceeb. Yog tias koj tsis ua, kev ua haujlwm poob qis thiab qhov chaw tuag sai dua. Hauv tsheb thiab dav hlau, nws yog ib qho kev ntsuas sib txawv. Koj xav tau cov ntaub ntawv uas ua kom sov tau zoo, tab sis koj kuj xav kom lawv ua lub teeb, yog li aluminium alloys thiab zoo nkauj composites yeej tawm.

Tom qab ntawd koj tau txais lub siab -tech sab-semiconductors thiab laser systems- qhov twg tsuas yog qhov zoo tshaj plaws yuav ua. Qhov ntawd yog qhov chaw pob zeb diamond thiab txhuas nitride tuaj.

Nrog cov khoom siv tau me dua thiab muaj zog dua txhua xyoo, muaj ib txwm muaj kev thawb rau cov khoom siv thermal zoo dua. Qhov ntawd yog tsav qee qhov kev ua kom txias, zoo li cov khoom sib xyaw tshiab thiab cov khoom siv nano uas ua kom sov zoo li tsis muaj dab tsi ua ntej.

Yav tom ntej Trends thiab Material Innovations
 

Cov tiam tom ntej ntawm cov khoom siv thermal conductivity yog ua los ntawm cov khoom sib xyaw ua ke thiab kev ua tiav hauv nanotechnology. Cov kws tshawb fawb tau zeroing ntawm cov ntaub ntawv xws li graphene, carbon nanotubes, thiab boron arsenide -cov no txhua tus thawb cov kev txwv thaum nws los txog rau kev txav mus los, tshwj xeeb tshaj yog nyob rau ntawm nanoscale. Siv cov pa roj carbon nanotubes, piv txwv. Hauv cov chaw kuaj sim, lawv tau qhia tawm -- cov kab kos thermal conductivity, qee zaum tshaj 6000 W/m·K.

Tab sis nws tsis yog hais txog ib qho khoom siv xwb. Tib neeg tab tom sib xyaw cov hlau nrog ceramics los yog xaws hauv cov pa roj carbon-raws li cov qauv rau cov khoom siv hybrids uas sib npaug ntawm lub zog thiab kev tswj kom sov. Cov txheej txheem kev tsim khoom tshiab xws li kev tsim khoom ntxiv yog cia cov kws tsim khoom tsim cov dab dej kub hauv cov duab uas tsuas yog ua tsis tau ua ntej, nyem tawm ntau dua.

Cov khoom siv hluav taws xob ua kom me me thiab muaj zog dua, yog li qhov kev sib tw no rau kev tswj xyuas thermal zoo tsis qeeb. Cov kev txhim kho no tsis yog nthuav rau hauv daim ntawv xwb-lawv tab tom hloov qhov kev ua si rau lub tsheb fais fab, super- cov chaw khaws ntaub ntawv zoo, thiab kev ua haujlwm siab - suav. Yog tias koj xav paub seb yav tom ntej mus rau qhov twg, tej zaum nws yuav khiav txias dua li qub.

Cov lus piav qhia

PowerWinxyog cov chaw tsim khoom lag luam tshwj xeeb hauv kev tswj xyuas thermal siab, suav nrog txhuas thiab tooj liab kub dab dej, skived fin heat sinks, thiab kua txias daim hlau. Nrog cov kws tshaj lij hauv kev tuag casting, CNC machining, thiab brazing technologies, PowerWinx muab siab -kev ua tau zoo, tus nqi-txoj kev txias kom haum rau kev lag luam xws li hluav taws xob, hluav taws xob tauj dua tshiab, thiab kev siv tsheb.

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