Cov ntaub ntawv thermal field tseem ceeb: C/C composite materials

Cov khoom sib xyaw ua los ntawm cov pa roj carbonyog ib hom carbon fiber composites, nrog carbon fiber ua cov khoom siv txhawb nqa thiab cov pa roj carbon tso ua cov khoom siv matrix. Lub matrix ntawmCov khoom sib xyaw ua ke C/C yog cov pa roj carbonVim tias nws yuav luag tag nrho yog ua los ntawm cov pa roj carbon, nws muaj kev tiv thaiv kub zoo heev thiab tau txais cov khoom siv kho tshuab zoo ntawm cov roj carbon fiber. Nws tau raug lag luam hauv kev tiv thaiv ua ntej.

Cov cheeb tsam thov:

Cov ntaub ntawv sib xyaw ua ke C/Cnyob hauv nruab nrab ntawm cov saw hlau kev lag luam, thiab cov khoom siv sab saud suav nrog cov carbon fiber thiab preform manufacturing, thiab cov teb thov sab hauv qab dav heev.Cov ntaub ntawv sib xyaw ua ke C/Cfeem ntau yog siv ua cov ntaub ntawv tiv taus cua sov, cov ntaub ntawv sib txhuam, thiab cov ntaub ntawv ua haujlwm siab. Lawv siv rau hauv aerospace (rocket nozzle throat linings, thermal protection materials thiab engine thermal structural parts), brake materials (high speed rail, aircraft brake discs), photovoltaic thermal fields (insulation barrels, crucibles, guide tubes thiab lwm yam khoom), biological bodies (artificial pob txha) thiab lwm yam teb. Tam sim no, domesticCov ntaub ntawv sib xyaw ua ke C/Ccov tuam txhab feem ntau tsom mus rau qhov txuas ib qho ntawm cov ntaub ntawv sib xyaw thiab nthuav dav mus rau qhov kev taw qhia upstream preform.

Cov ntaub ntawv sib xyaw ua ke C/C muaj kev ua tau zoo heev, nrog rau qhov ceev tsawg, lub zog tshwj xeeb siab, modulus tshwj xeeb siab, kev ua kom sov siab, coefficient nthuav dav thermal qis, lub zog tawg zoo, tiv taus kev hnav, tiv taus ablation, thiab lwm yam. Tshwj xeeb, tsis zoo li lwm cov ntaub ntawv, lub zog ntawm cov ntaub ntawv sib xyaw ua ke C/C yuav tsis txo qis tab sis yuav nce ntxiv nrog qhov kub nce. Nws yog cov ntaub ntawv tiv taus cua sov zoo heev, yog li ntawd nws tau raug siv ua thawj zaug hauv kev lag luam hauv cov ntaub thaiv caj pas foob pob hluav taws.

Cov khoom siv C/C sib xyaw tau txais cov khoom siv kho tshuab zoo heev thiab cov khoom ua haujlwm ntawm carbon fiber, thiab muaj kev tiv thaiv cua sov thiab kev tiv thaiv corrosion ntawm graphite, thiab tau dhau los ua tus neeg sib tw muaj zog ntawm cov khoom graphite. Tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov nrog cov kev xav tau siab zog - photovoltaic thermal teb, qhov kev siv nyiaj-zoo thiab kev nyab xeeb ntawm cov khoom siv C/C sib xyaw tau dhau los ua qhov tseem ceeb dua nyob rau hauv cov nplai loj silicon wafers, thiab nws tau dhau los ua qhov kev thov nruj. Ntawm qhov tsis sib xws, graphite tau dhau los ua ib qho ntxiv rau cov khoom siv C/C sib xyaw vim muaj peev xwm tsim khoom tsawg ntawm sab kev muab khoom.

Daim ntawv thov photovoltaic thermal teb:

Lub tshav kub yog tag nrho lub kaw lus rau kev tswj hwm kev loj hlob ntawm monocrystalline silicon lossis kev tsim cov polycrystalline silicon ingots ntawm qee qhov kub. Nws ua lub luag haujlwm tseem ceeb hauv kev huv, kev sib xws thiab lwm yam zoo ntawm monocrystalline silicon thiab polycrystalline silicon, thiab koom nrog rau pem hauv ntej ntawm kev lag luam tsim khoom crystalline silicon. Lub tshav kub tuaj yeem faib ua lub tshav kub ntawm monocrystalline silicon ib leeg siv lead ua kom sov thiab lub tshav kub ntawm polycrystalline ingot cub raws li hom khoom. Txij li thaum monocrystalline silicon cells muaj kev hloov pauv siab dua li polycrystalline silicon cells, feem ntawm kev ua lag luam ntawm monocrystalline silicon wafers txuas ntxiv nce, thaum feem ntawm kev ua lag luam ntawm polycrystalline silicon wafers hauv kuv lub tebchaws tau txo qis txhua xyoo, los ntawm 32.5% hauv xyoo 2019 txog 9.3% hauv xyoo 2020. Yog li ntawd, cov chaw tsim khoom thermal teb feem ntau siv txoj kev siv tshuab thermal teb ntawm cov cua sov siv lead ua kom sov.

Daim Duab 2: Lub tshav kub hauv cov saw hlau tsim khoom siv crystalline silicon

Lub tshav kub kub muaj ntau tshaj kaum ob lub Cheebtsam, thiab plaub lub hauv paus tseem ceeb yog lub crucible, lub raj qhia, lub tog raj kheej rwb thaiv tsev, thiab lub cua sov. Cov khoom sib txawv muaj cov kev xav tau sib txawv rau cov khoom siv. Daim duab hauv qab no yog daim duab qhia txog lub tshav kub ntawm ib lub siv lead ua silicon. Lub crucible, lub raj qhia, thiab lub tog raj kheej rwb thaiv tsev yog cov khoom ntawm lub tshav kub kub. Lawv lub luag haujlwm tseem ceeb yog txhawb nqa tag nrho lub tshav kub kub, thiab lawv muaj cov kev xav tau siab rau qhov ceev, lub zog, thiab kev ua haujlwm thermal. Lub cua sov yog lub ntsiab lus cua sov ncaj qha hauv lub tshav kub. Nws lub luag haujlwm yog muab lub zog thermal. Nws feem ntau yog resistive, yog li nws muaj cov kev xav tau siab dua rau cov khoom siv resistivity.