Nkag siab txog cov ntawv thermal conductive silicone hauv ib kab lus

Traditional thermally conductive cov ntaub ntawv feem ntau yog cov hlau (Ag, Cu, thiab Al) thiab hlau oxides (Al₂O₃, MgO, thiab BeO), nrog rau cov khoom tsis yog- hlau (graphite, carbon dub, Si₃N₄, thiab AlN). Cov kev cai tshiab tau raug tsim los ntawm cov ntaub ntawv thermally conductive raws li kev nce qib ntawm kev tsim khoom thiab kev tshawb fawb thiab thev naus laus zis. Lub siab xav rau cov ntaub ntawv nrog cov khoom tshwj xeeb tshaj plaws tau pom. Hauv cov khoom siv hluav taws xob thiab hluav taws xob, qhov loj ntawm cov khoom siv hluav taws xob thiab cov logic circuits tau poob los ntawm ntau txhiab lub sij hawm vim qhov kev loj hlob sai ntawm kev sib koom ua ke thiab kev sib dhos thev naus laus zis. Yog li ntawd, cov ntaub ntawv insulating nrog siab thermal conductivity yuav tsum tau. Ob peb xyoos dhau los, daim ntawv thov teb ntawm cov ntaub ntawv polymer tau nthuav dav tsis tu ncua. Kev hloov cov khoom siv ib txwm siv, tshwj xeeb yog cov khoom siv hlau, nrog cov khoom siv hluavtaws hluavtaws tau dhau los ua qhov tseem ceeb ntawm kev tshawb fawb thoob ntiaj teb. I. Dab tsi yog Thermally Conductive Silicone Sheets?

Silicone nplooj ntawv uas yog thermally conductive yog ib hom khoom nruab nrab uas yog synthesized los ntawm cov txheej txheem tshwj xeeb. Cov txheej txheem no suav nrog kev siv silicone ua cov khoom siv hauv paus thiab ntxiv rau ntau yam khoom siv, xws li hlau oxides. Thermally conductive silicone roj hmab yog cov khoom siv polymer sib xyaw uas ua tiav cov thermal conductivity los ntawm kev sau nws nrog cov hmoov thermally conductive thiab siv cov organosilicon resin ua cov ntawv khi.

II. Feem ntau siv cov ntaub ntawv Matrix thiab cov khoom ntim rau cov ntawv thermal conductive Silicone

Organosilicon Resin (Basic Raw Khoom)

1. Insulating thiab Thermally Conductive Fillers: Alumina, Magnesium Oxide, Boron Nitride, Aluminium Nitride, Beryllium Oxide, Quartz, thiab lwm yam. Organosilicon Plasticizers

2. Nplaim Retardants: Magnesium Hydroxide, Aluminium Hydroxide

3. Inorganic Colorants (Color Differentiation)

4. Crosslinking tus neeg saib xyuas (adhesion kev ua tau zoo)

5. Catalyst (cov txheej txheem molding yuav tsum)

Lus Cim: Cov thermal conductive silicone pads pab lub thermal conductivity muaj nuj nqi, ua ib tug zoo thermal conduction txoj kev ntawm lub tshav kub - tsim cov khoom thiab lub tshav kub - dissipating ntaus ntawv. Ua ke nrog cov dab dej kub, cov txheej txheem fasteners (kiv cua), thiab lwm yam, lawv tsim cov khoom cua kub dissipation module.

Fillers muaj xws li cov hauv qab no hlau thiab inorganic fillers:

1. Hlau hmoov fillers: tooj liab hmoov, txhuas hmoov, hlau hmoov, tin hmoov, nickel hmoov, thiab lwm yam.;

2. Hlau oxides: aluminium oxide, bismuth oxide, beryllium oxide, magnesium oxide, zinc oxide;

3. Hlau... Nitrides: Aluminium nitride, Boron nitride, Silicon nitride;

4. Inorganic non-hlau: Graphite, Silicon carbide, Carbon fiber, Carbon nanotubes, Graphene, Beryllium carbide, thiab lwm yam.

Duab III. Kev faib tawm ntawm Thermally Conductive Silicone Gaskets
Cov thermal conductive silicone gaskets tuaj yeem muab faib ua: thermally conductive silicone pads thiab tsis yog -silicone silicone pads. Cov hluav taws xob rwb thaiv tsev ntawm feem ntau thermally conductive silicone gaskets yog qhov kawg txiav txim siab los ntawm cov khoom rwb thaiv tsev ntawm cov khoom muab tub lim.

1. Thermally Conductive Silicone Pads
Thermally conductive silicone pads tau muab faib ua ntau pawg, txhua tus muaj nws tus kheej cov yam ntxwv.

2. Tsis yog-Silicone Silicone Pads Tsis yog-silicone silicone pads yog cov khoom siv thermal conductivity siab, ob npaug -sab tus kheej- nplaum. Thaum siv hauv cov khoom siv hluav taws xob sib dhos, lawv pom cov thermal tsis tshua muaj zog thiab zoo hluav taws xob rwb thaiv tsev cov khoom nyob rau hauv qis compressive quab yuam. Lawv ua haujlwm ruaj khov los ntawm -40℃mus rau 150℃thiab ua tau raws li UL94V0 nplaim taws retardant.

IV. Thermal Conductivity Mechanism ntawm Thermally Conductive Silicone

Lub thermal conductivity ntawm thermally conductive silicone nyob ntawm kev sib cuam tshuam ntawm polymer thiab thermally conductive muab tub lim. Ntau hom fillers muaj cov thermal conductivity sib txawv.

1. Thermal Conductivity Mechanism ntawm Hlau Fillers
Hlau fillers feem ntau ua cua sov los ntawm electron txav; cov txheej txheem ntawm electron txav yog nrog los ntawm kev hloov hluav taws xob.

2. Thermal Conductivity Mechanism of Non-Metal Fillers
Tsis yog- cov khoom siv hlau feem ntau cia siab rau phonon conduction; lawv cov cua kub diffusion feem ntau yog nyob ntawm kev co ntawm cov atoms nyob sib ze lossis cov pab pawg sib txuas. Cov no suav nrog hlau oxides, hlau nitrides, thiab carbides.

V. Yuav Siv Cov Ntawv Thermal Conductive Silicone Li Cas

Feem ntau, thermally conductive silicone pads yuav tsum tau muab tso rau hauv cov txheej txheem, kho vajtse, thiab Circuit Court tsim los ntawm thawj theem tsim. Cov yam ntxwv uas yuav tsum tau xav txog feem ntau suav nrog: thermal conductivity, kev tsim qauv, EMC, kev co damping thiab suab nqus, thiab kev teeb tsa thiab kev sim.

1. Kev Xaiv Cov Kev Tiv Thaiv Thaum Tshav Kub Kub: Cov khoom siv hluav taws xob tau hloov mus rau cov qauv me me, nyias, thiab sib dua, feem ntau siv cov txheej txheem txias txias, ib txwm tso siab rau cov dab dej kub. Cov qauv tam sim no yog tshem tawm cov dab dej kub tag nrho, siv cov khoom siv hluav taws xob ua kom sov (hlau brackets, hlau casings); los yog sib txuas cov kev daws teeb meem hauv cov dab dej kub nrog cov txheej txheem kub dissipation Cheebtsam. Txoj kev daws teeb meem nrog tus nqi zoo tshaj - kev ua tau zoo piv yuav tsum raug xaiv raws li qhov sib txawv ntawm cov kev cai thiab ib puag ncig.

2. Yog hais tias siv lub dab dej kub, nws tsis pom zoo kom siv thermally conductive ob -sided daim kab xev nrog thermal conductivity tsawg; tsis yog nws pom zoo kom siv thermal roj yam tsis muaj kev vibration damping peev xwm. Nws yog pom zoo kom siv cov hlau hooks lossis yas pushpins rau kev ua haujlwm, xaiv 0.5mm... Siv cov khoom siv thermally conductive silicone pads ua ke nrog lwm txoj hauv kev muab kev yooj yim installation thiab tshem tawm qhov xav tau ntawm cov nplaum nplaum. Qhov no ua rau kom muaj cua sov zoo dua li ob npaug -sided thermally conductive daim kab xev, thiab muaj kev nyab xeeb dua thiab txhim khu kev qha. Tus nqi tag nrho, suav nrog tus nqi tsev, kev ua haujlwm, thiab khoom siv, muaj kev sib tw ntau dua.

3. Thaum xaiv cov txheej txheem cua sov dissipation, nws yog ib qho tsim nyog yuav tsum xav txog cov txheej txheem ntawm cov txheej txheem ntawm cov cua kub dissipation, xws li cov hauv zos protrusions los yog recesses ntawm qhov chaw sib cuag. Qhov sib npaug yuav tsum raug ntaus ntawm cov qauv tsim thiab qhov loj ntawm thermally conductive silicone ncoo. Yog tias cov txheej txheem tso cai, nws raug nquahu kom tsis txhob xaiv cov tuab tuab heev thermally conductive silicone pads. Txhawm rau kom yooj yim ntawm kev ua haujlwm, ib qho - sab nraub qaum yog feem ntau pom zoo, nrog rau cov nplaum - coated sab siv rau cov qauv cua sov. Nws yog ib qho tseem ceeb uas yuav tau xaiv ib lub ncoo uas muaj qhov sib piv zoo los xyuas kom meej txaus siab ntawm cov thermally conductive silicone ncoo. (Lub thickness ntawm thermally conductive silicone ncoo yuav tsum tshaj qhov theoretical sab sauv txwv ntawm clearance ntawm lub tshav kub dissipation qauv thiab lub tshav kub qhov chaw, feem ntau yog los ntawm 1mm-2mm.) Thaum xaiv tshav kub dissipation qauv, txoj hauj lwm, qhov siab, thiab pob hom ntawm cov khoom yuav tsum tau txiav txim siab thaum lub sij hawm PCB layout. Kev tso cua sov tsis tu ncua tuaj yeem txo tus nqi ntawm cov qauv cua sov.

VI. Yuav Ua Li Cas Xaiv Cov Thermal Conductive Silicone Sheets
Kev xaiv ntawm thermal conductivity feem ntau yog nyob ntawm lub hwj chim noj ntawm lub tshav kub qhov chaw thiab lub tshav kub dissipation muaj peev xwm ntawm lub dab dej kub los yog kub dissipation qauv. Feem ntau, chips uas tsis tshua muaj kub specifications, kub siab, los yog kub kub flux ceev (feem ntau ntau dua 0.6 W / cm³ xav tau cua sov dissipation, thaum cov neeg uas muaj kub flux ntom tsawg tshaj li 0.04 W / cm² tsuas yog yuav tsum tau tej yam ntuj tso convection) yuav tsum tau tshav kub dissipation, thiab thermal conductive silicone los xij yuav tsum tau xaiv ntau dua. Hauv kev lag luam khoom siv hluav taws xob, cov khoom siv hluav taws xob sib txuas feem ntau tsis tso cai kom siab tshaj 85 degrees Celsius, thiab nws raug nquahu kom tswj cov nti saum npoo kub qis dua 75 degrees Celsius thaum lub sij hawm siab - ntsuas kub. Cov khoom ntawm tag nrho lub rooj tsavxwm feem ntau yog kev lag luam qib - qib, yog li qhov ntsuas kub sab hauv tau pom zoo kom tsis pub tshaj 50 degrees Celsius ntawm chav tsev kub. Qhov saum npoo ntawm thawj qhov chaw, lossis qhov chaw uas cov neeg siv khoom kawg tuaj yeem tiv tauj, yuav tsum muaj qhov kub siab tshaj 45 degrees Celsius ntawm chav tsev kub. Xaiv cov ntawv thermal conductive silicone nrog cov thermal conductivity ntau dua tuaj yeem ua tau raws li cov qauv tsim thiab tso cai rau qee qhov qauv tsim.

Nco tseg: Thaum tshav kub kub flux ceev: txhais raws li: lub tshav kub flux ceev nyob rau hauv ib chav tsev cheeb tsam (1 square meter) ib lub sij hawm (1 Lub hlws ris kub (JT) ntsuas tus nqi ntawm tshav kub uas dhau los ntawm lub semiconductor wafer mus rau lub ntim khoom vaj tse nyob rau hauv vib nas this. vaj tse, nrog rau cov thermal kuj.

VII. Cov yam ntxwv cuam tshuam rau thermal conductivity ntawm Thermally Conductive Silicone

1. Hom thiab cov khoom ntawm cov khoom siv Polymer Matrix: Cov khoom siv thermal conductivity matrix ntau dua, zoo dua muab tub lim dispersion hauv matrix, thiab kev sib raug zoo ntawm matrix thiab muab tub lim ua rau cov thermal conductivity zoo dua ntawm cov khoom sib xyaw.

2. Hom Filler: Cov muab tub lim ntau dua thermal conductivity feem ntau ua rau cov thermal conductivity zoo dua ntawm cov khoom sib xyaw.

3. Cov duab ntawm Filler: Feem ntau, qhov kev txiav txim ntawm kev yooj yim ntawm txoj kev thermal yog whiskers > fibers > flakes > granules. Qhov yooj yim dua nws yog rau cov muab tub lim los ua cov txheej txheem thermal, qhov zoo dua cov thermal conductivity.

4. Cov Ntsiab Lus Filler Kev faib cov fillers nyob rau hauv lub polymer txiav txim siab thermal conductivity ntawm cov khoom sib xyaw. Thaum cov ntsiab lus muab tub lim yog tsawg, cov nyhuv thermal conductivity tsis tseem ceeb; Thaum cov ntsiab lus muab tub lim ntau dhau, cov khoom siv kho tshuab ntawm cov khoom sib xyaw tau cuam tshuam zoo heev. Txawm li cas los xij, thaum cov ntsiab lus muab tub lim nce mus rau ib qho txiaj ntsig, kev sib cuam tshuam ntawm cov fillers tsim ib lub network -zoo li los yog chain-zoo li thermally conductive network hauv lub cev. Lub thermal conductivity yog qhov zoo tshaj plaws thaum cov kev taw qhia ntawm lub network no ua raws li cov kev taw qhia ntawm cov cua sov. Yog li ntawd, nws yog ib qho tseem ceeb rau tus nqi ntawm thermally conductive muab tub lim.

5. Bonding Yam ntxwv ntawm Filler thiab Matrix Material Qhov siab dua qhov kev sib txuas ntawm cov muab tub lim thiab cov matrix, qhov thermal conductivity zoo dua. Siv tus neeg sawv cev sib txuas tsim nyog los kho qhov chaw ntawm qhov muab tub lim tuaj yeem ua kom cov thermal conductivity los ntawm 10% -20%.