Fine- Graphite Graphite yog dab tsi?

SHJ-CARBON nkag siab tias nws tseem ceeb npaum li cas los xaiv hom kev nplua zoo-grained graphite rau cov ntawv thov tshwj xeeb. Nrog25 xyoo ntawm kev paub hauv kev ua haujlwm, xav, thiabmuab cov kev daws teeb meem graphite, peb tau ua kom nkag siab tob txog cov ntaub ntawv cov ntaub ntawv thiab lawv yuav siv tau li cas kom tau raws li kev lag luam.

Hauv tsab xov xwm no, peb yuav tshawb xyuas cov npe no kom ntxaws, qhia txog qhov sib txawv ntawm lawv thiab cov txiaj ntsig tshwj xeeb uas txhua tus muaj. Txawm hais tias koj koom nrog hauv kev tsim khoom, kev tsim khoom, lossis kev tsim khoom, paub txog cov nuances ntawm nplua -grained graphite tuaj yeem ua rau txhua qhov sib txawv hauv kev xaiv cov khoom zoo tshaj plaws rau koj cov kev xav tau. Nrog peb cov kev paub dhau los,SHJ-CARBONyog npaj los muab cov kws tshaj lij cov lus qhia thiab cov kev daws teeb meem raws li koj qhov project, xyuas kom koj tau txais cov khoom siv zoo tshaj plaws rau kev ua haujlwm zoo.

--Sau keeb kwm

Ntawm SHJ-CARBON, peb nquag koom nrog kev lag luam graphite los txhim kho peb cov kev txawj ntse. Ua raws li kuvnsights qhia los ntawm xibfwb Liu Hongbontawm2025 6th Semiconductor Carbon Materials Technology Seminar, peb tau muab nws txoj kev paub nrog peb 25 xyoo ntawm kev paub los muab kev nkag siab tob txog kev nplua -grained graphite. Kab lus no qhia txog peb txoj kev mob siab rau kev kawm tas mus li thiab sib qhia cov kws tshaj lij hauv kev ua haujlwm.

Fine-grained graphite is a high-density material that stands out for its exceptional properties, including excellent thermal and electrical conductivity, high strength, and stability under extreme conditions. Ua los ntawm cov roj av coke lossis pitch coke ua cov khoom siv hauv paus thiab cov thee tar pitch li cov ntaub ntawv, nplua -grained graphite yog tsim los ntawm cov txheej txheem xws li sib tov, sib sau, ci thiab graphitization. Qhov no tshwm sim nyob rau hauv ib tug ntom qauv, feem ntau nrog ib tug ceev ntawm ntau tshaj los yog sib npaug rau 1.78 g / cm³.

Siv nyob rau hauv ntau qhov kev lag luam los ntawm kev tsim hluav taws xob mus rau aerospace, nplua -grained graphite raug xaiv rau nws qhov siab - kev ua tau zoo. Raws li ib tug khoom muag khoom nrog tshaj25 xyoo ntawm kev paub, SHJ-CARBONyog zoo-versed nyob rau hauv nplua-grained graphite cov ntawv thov, ua, thiab cov lus pom zoo, muab cov kws tshaj lij kev daws teeb meem raws li cov kev xav tau tshwj xeeb hauv kev lag luam.

Fine-grained graphite yuav mus los ntawm ntau lub npe, nyob ntawm nws cov txheej txheem tsim khoom tshwj xeeb, qauv, lossis xav siv. Txhua lo lus qhia txog tus yam ntxwv tshwj xeeb lossis qhov zoo uas ua rau nws haum rau kev siv sib txawv. Cov npe nrov tshaj plaws suav nrog:

• High -Kev Ua Haujlwm Graphite:Paub txog nws sab saum toj -notch thermal thiab hluav taws xob conductivity, zoo tagnrho rau siab -xav tau ib puag ncig.
• Moulded Graphite:Tsim siv compression molding, muab precision thiab sib xws hauv nws cov khoom.
• Isostatic Graphite: Produced with isostatic pressing, ensuring uniform density and high strength for specialized applications.
• Anisotropic Graphite:Tso tawm cov khoom sib txawv raws cov axes sib txawv, feem ntau siv rau hauv cov ntawv thov xav tau kev coj ua.
• High -Purity Graphite:Cov txheej txheem tshem tawm cov impurities, muab cov kev coj ua tshwj xeeb thiab cuam tshuam tsawg kawg hauv kev siv thev naus laus zis siab -.
• Nuclear Graphite:Tsim tshwj xeeb rau kev siv nyob rau hauv nuclear reactors, qhov chaw siab stability thiab tsawg neutron absorption yog qhov tseem ceeb.
• Tus kheej -Sintering Graphite:Muaj peev xwm ntawm tus kheej -sintering thaum lub sijhawm tsim khoom, tshem tawm qhov xav taurau ntxiv binders.
• Hard Graphite:Paub txog nws qhov tshwj xeeb hardness thiab durability, zoo tagnrho rau cov ntawv thov kev lag luam uas xav tau lub zog.

Fine-grained graphite muaj ntau yam zoo dua li graphite li niaj zaus:

• High Density:Fine-grained graphite muaj qhov ntom ntom dua, ua rau muaj zog thiab ruaj khov.
• Ua kom muaj zog:Nws cov qauv zoo tshaj plaws muab cov cuab yeej zoo tshaj plaws, txhim kho kev ua haujlwm hauv kev thov.
• Nce hluav taws xob Resistivity:Piv nrog rau cov qauv graphite, nplua -grained graphite muaj hluav taws xob tiv taus ntau dua, ua rau nws tsim nyog rau cov ntawv thov uas yuav tsum tau tswj cov conductivity.
• Siab Hardness:Fine-grained graphite yog ib qho nyuaj, ua rau nws tiv taus hnav thiab puas.
• Siab dua Thermal Expansion:Nws muaj cov coefficient siab dua ntawm thermal expansion, tso cai rau nws los tswj qhov kub thiab txias.
• Lower Porosity:Cov qauv zoo txo ​​qhov porosity, txo cov pa roj thiab noo noo nqus thiab txhim kho kev ua haujlwm hauv siab - siab lossis lub tshuab nqus tsev.

1. Overcapacity thiab nqi txo cov kev ntxhov siab

• Txoj kev loj hlob zoo -grained graphite hauv Suav teb tau pib thaum xyoo 1960, uas tau tsav los ntawm kev xav tau tub rog. Thaum pib, lub xeev - cov tuam txhab ua lag luam tsim cov pwm zoo -grained graphite, uas tom qab ntawd nthuav dav mus rau kev lag luam pej xeem. Sij hawm dhau mus, txoj kev txias isostatic nias tau qhia rau kev tsim khoom.

  Thaum kawg ntawm lub xyoo pua 20th, kev lag luam kev tsim khoom muaj peev xwm raug txwv tsawg dua 50,000 tons ib xyoos ib zaug, nrog cov khoom loj txwv rau Φ300mm lossis 300 × 300mm, thiab hmoov particle loj feem ntau nyob rau hauv 200 mesh (75μm). Txawm li cas los xij, tom qab xyoo 2006, kev loj hlob sai ntawm kev lag luam xws li photovoltaics fueled peev, ua rau cov tuam txhab muaj peev xwm txog li 30,000 tons ib xyoos twg thiab cov khoom lag luam xws li Φ400mm txog Φ1300mm.

  Tsis ntev los no, kev hloov pauv hauv kev lag luam thoob ntiaj teb thiab kev sib tw los ntawm C / C cov ntaub ntawv sib xyaw tau ua rau muaj peev xwm dhau ntawm kev nplua -grained graphite kev lag luam. Cov tuam txhab tam sim no tab tom ntsib kev nyuaj siab los txo cov nqi thiab txhim kho kev ua haujlwm kom nyob twj ywm kev sib tw.

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2. Kev sib tw hauv Kev Tsim Kho Siab -End (Ultra) Fine-Grained Graphite

• Txhawm rau ua kom tau raws li kev loj hlob sai ntawm kev lag luam photovoltaic, qhov nplua -grained graphite chaw tsim tshuaj paus tau ntev tau tsom mus rau kev tsim loj- cov khoom loj los daws cov teeb meem tseem ceeb xws li kev tawg. Qhov no tsom mus rau loj - cov khoom lag luam loj tau ua rau muaj kev tsis saib xyuas ntawm kev tshawb fawb thiab kev tsim kho thev naus laus zis rau cov khoom zoo heev -grained graphite.

  Kev siv C/C cov ntaub ntawv sib xyaw ntau ntxiv hauv kev lag luam photovoltaic tau ntxiv qhov kev thov rau C / C thermal teb loj dua, nyem qhov kev lag luam sib faib kom nplua -grained graphite thiab tsav kev lag luam kom hloov mus rau ultra nplua -grained graphite uas tsis tuaj yeem hloov tau yooj yim los ntawm nruab nrab thiab qis - ntom C/C composites

  Nyob rau hauv xyoo tas los no, cov tuam txhab ua lag luam hauv tsev thiab cov neeg tuaj tshiab tau pib tsom mus rau txoj kev loj hlob ntawm ultra nplua -grained graphite, cim txoj kev loj hlob tshiab. Hais txog qhov theoretical thiab cov kev sib tw tseem ceeb hauv kev tsim cov khoom siv high -end graphite thiab ua tiav kev hloov pauv hauv tsev tau dhau los ua qhov kev pom zoo thiab qhov kev sib tw tseem ceeb rau kev lag luam.

3. Kev sib tw hauv kev txhim kho kev sib raug zoo ntawm cov khoom loj -Sized Products

Tau ntau xyoo, lub hom phiaj ntawm kev nplua -grained graphite txoj kev loj hlob hauv Suav teb tau txhim kho cov khoom xws li qhov ntom ntom, lub zog, hluav taws xob thiab thermal conductivity, thiab txo qhov porosity kom tau raws li qhov xav tau ntawm cov ntawv thov siab dua. Txawm hais tias kev saib xyuas tsis ntev los no tau hloov mus rau kev txhim kho cov khoom sib xws, tseem tsis tau muaj kev nkag siab meej txog lub hauv paus ua rau tsis sib xws. Cov tswv yim daws teeb meem los daws qhov tsis ua haujlwm ntawm cov khoom siv hauv tsev tseem tsis muaj.

Qhov teeb meem tseem ceeb nrog cov khoom sib xws yog qhov sib txawv ntawm kev ua tau zoo hauv tib daim, nrog rau ntawm cov khoom sib txawv thiab cov khoom siv. Cov khoom loj dua yuav muaj ntau qhov tsis sib xws. Qhov no cuam tshuam ncaj qha rau cov khoom lag luam kev ua tau zoo thiab qib kev ntseeg siab hauv kev tsim khoom hauv tsev zoo -grained graphite. Yuav kom daws tau qhov no, nws yog ib qho tseem ceeb rau kev tshawb fawb kom nkag siab zoo txog qhov ua rau tsis sib xws, tsim cov thev naus laus zis tseem ceeb los txhim kho qhov sib xws - tshwj xeeb tshaj yog rau cov khoom loj - thiab tsim cov cuab yeej tshwj xeeb los txhim kho cov khoom sib xws. Cov kev siv zog no yog qhov tseem ceeb rau yav tom ntej ntawm kev nplua -grained graphite kev lag luam.

Tsis yog -Impregnation Densification Technology rau Fine-Grained Graphite

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• Hauv kev tsim khoom hauv tsev ntawm loj -sized isostatic fine-grained graphite, siab muaj tseeb-coke ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom yog feem ntau ua haujlwm los tiv thaiv kev tawg. Thaum qhov no txhim kho cov txiaj ntsig, nws yuav tsum muaj 1-2 lub voj voog impregnation-ci kom ua tiav qhov ntom ntom thiab lub zog txaus, ncua sij hawm ntau lawm thiab nce nqi.

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  International Txoj Kev:Cov tuam txhab txawv teb chaws siv cov ntaub ntawv thib ob (cov hmoov compressed) nrog cov nqi qis dua thaum lub sij hawm ci rau qhov loj - qhov loj me -grained isostatic graphite. Qhov no tso cai rau ua tiav qhov siab ceev thiab cov khoom siv kho tshuab nrog xoom lossis tsuas yog ib lub voj voog impregnation. Txawm li cas los xij, thaum siv high-shrinkage hmoov rau loj- loj graphite, tus nqi cua sov thaum lub sij hawm thawj ci yuav tsum raug txo kom tsim nyog.

   

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  Ultra-Fine vs. Photovoltaic- Qib Graphite:Ultra-zoo graphite feem ntau muaj qhov me me, ua rau nws haum rau siab -shrinkage hmoov. Txawm li cas los xij, cov khoom me me yuav tsum muaj ntau qhov sib txuam, ua rau kom muaj kev sib tw ntau dua thaum ci. Yog li, qhov txo qis cua sov yog qhov tseem ceeb.

   

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  Mixing Challenges:Cov coke me me yog qhov nyuaj rau sib tov sib xyaw nrog binder suab. Domestic ob - hniav kneaders feem ntau muaj "qhov chaw tuag" nrog cov khoom siv qeeb. Ua kom tiav lub suab txheej ntawm ultrafine coke hais yog qhov kev sib tw tseem ceeb.

   

Nyob rau hauv xyoo tas los no, qhov kev thov loj hlob ntawm graphite hauv hluav taws xob tawm machining (EDM) pwm, 3D thermal bending pwm, thiab semiconductor nti ua tau coj ntau lub tuam txhab hauv tsev los pib sim ua cov khoom siv ultra- zoo isostatic graphite. Los ntawm kev txo qhov loj me me thiab txhim kho cov txheej txheem sib xyaw, cov tuam txhab no tau txhim kho cov khoom siv hluav taws xob ntawm isostatic graphite. Txawm li cas los xij, tseem muaj qhov sib txawv ntawm cov khoom siv lub cev, kev sib xws, kev tsim khoom, thiab kev sib koom ua lag luam piv rau cov khoom zoo sib xws hauv lwm lub khw.

Hauv kev teb rau kev lag luam hloov zuj zus sai, tshwj xeeb tshaj yog nrog kev nce qib thib peb - tiam semiconductors xws li ib leeg siv lead ua silicon carbide (SiC) thiab gallium nitride (GaN), muaj kev tsom mus rau kev txhim kho ntawm ultra- ntshiab nplua -grained graphite. Thaum Tuam Tshoj tau tsim lub hauv paus nyob rau hauv siab -purity nplua-grained graphite, kev lag luam tseem tab tom ua tiav hauv kev tsim cov graphite tshwj xeeb rau cov ntawv thov xws li ib leeg siv lead ua SiC.

Txhawm rau tsav kev txhim kho sib txawv, kev lag luam tseem tab tom nrhiav rau cov pa roj carbon-raws li cov ntaub ntawv sib xyaw, xws li carbon/ceramic composites. Cov ntaub ntawv no, uas tuaj yeem tsim tau siv isostatic nias, muab cov khoom zoo dua qub xws li txhim kho oxidation tsis kam thiab hnav tsis kam. Qhov kev hloov pauv hauv kev tsom xam no qhib cov hauv kev tshiab rau kev nplua -grained graphite hauv siab- daim ntawv thov kev ua tau zoo, suav nrog hauv kev loj hlob semiconductor thiab cov khoom siv hluav taws xob txuas ntxiv mus.

Ob peb yam cuam tshuam rau qhov sib xws ntawm nplua -grained graphite, uas tuaj yeem muab faib ua ob pawg loj:

• Cov txheej txheem thiab cov cuab yeej siv-Txoj kev tsis sib xws:Kev hloov pauv hauv kev tsim khoom vim tsis yog - cov txheej txheem tsis tu ncua, cov khoom siv txwv tsis pub, kev hloov pauv cov ntaub ntawv, thiab teeb meem kev faib hluav taws xob.
• Raw Material thiab Process Control Variability:Kev tsis sib haum xeeb tshwm sim los ntawm cov khoom siv raw khoom tsis ruaj khov, hloov pauv qhov loj me, thiab cov txheej txheem tswj cov teeb meem.

Kev ua kom cov khoom sib xws yog qhov tseem ceeb rau kev txhim kho kev ntseeg tau ntawm cov nplua -grained graphite, tshwj xeeb tshaj yog nyob rau hauv siab - kev ua tau zoo. Kev txhim kho cov txheej txheem tsim khoom, tswj cov khoom siv raw khoom sib txawv, thiab txhim kho cov txheej txheem kev lees paub zoo yog qhov tseem ceeb rau kev tsim cov khoom zoo sib xws, siab - khoom zoo.

Raws li cov txheej txheem ib puag ncig txuas ntxiv nruj, kev lag luam carbon ntsib kev nyuaj siab kom txo qis emissions thiab kev siv hluav taws xob. Kev txais yuav cov khoom siv hluav taws xob thiab cov khoom siv ntse ntse muaj ntau yam zoo. Cov thev naus laus zis no tsis yog tsuas yog txo cov pa phem xwb tab sis kuj txo cov nqi tsim khoom los ntawm kev txo qis kev ua haujlwm thiab kev siv hluav taws xob.

Piv txwv li, kev tswj xyuas meej ntawm cov txheej txheem kho cua sov uas siv cov tshuab graphitization txuas ntxiv tuaj yeem txhim kho cov khoom sib xws thiab kev ua haujlwm zoo. Qhov no hloov mus rau automated, lub zog -ntau ntau lawm dlhos nrog ob qho tib si ib puag ncig lub hom phiaj thiab xav tau ntau dua - zoo zoo -grained graphite.

Zoo -grained graphitetau tshwm sim los ua cov khoom siv pob zeb rau kev siv cov kev lag luam siab heev, sib txuas ua haujlwm zoo nrog ntau yam tsis sib xws. Thaum lub peev xwm hauv tsev hauv ultrafine- qib ntau lawm nce mus ntxiv, qhov tseeb tseem tseem ceeb heev - cov qauv tsim kawg tseem vam khom rau cov neeg xa khoom txawv teb chaws - tshwj xeeb rau kev txiav- ntug semiconductor thiab daim ntawv thov nuclear. Qhov kev vam khom no qhia txog qhov xav tau ceev nrooj rau kev tsom mus rau kev tsim kho tshiab thoob plaws tag nrho cov khoom muaj nqis, los ntawm kev kho cov khoom siv raw mus rau kev ua tiav. Txoj hauv kev rau pem hauv ntej xav tau kev sib koom tes los ua tus tswv cov thev naus laus zis thaum tsav cov kev coj ua kom ruaj khov. Rau cov neeg koom nrog kev lag luam, tam sim no yog lub sijhawm los ua qhov tseem ceeb rau kev sib koom tes R&D kev sib koom tes, nqis peev hauv kev tsim khoom lag luam ntse, thiab ua kom muaj kev txawj ntse tshwj xeeb - vim tias yav tom ntej ntawm kev tsim khoom siab heev yuav raug sau, lus, hauv graphite.