1. Zokhalamo Zakuthupi ndi Kukhulupirika Kwamapangidwe
1.1 Zina mwazinthu za Silicon Carbide
(Silicon Carbide Crucibles)
Silicon carbide (SiC) ndi covalent ceramic chinthu chopangidwa ndi silikoni ndi maatomu a kaboni opangidwa mu tetrahedral latticework framework., makamaka kukhalapo kale 250 mitundu ya polytypic, ndi 6h, 4H, ndi 3C kukhala imodzi mwazoyenera kwambiri.
Kumangirira kwake kolimba kumapereka kuuma kwapadera (Mohs ~ 9.5), mkulu matenthedwe madutsidwe (80– 120 W/(m · k )kwa makhiristo abwino okha), ndi chidwi inertness mankhwala, kuchipanga kukhala chimodzi mwazinthu zolimba kwambiri zamamlengalenga owopsa.
Gulu lalikulu (2.9– 3.3 eV) imawonetsetsa kuti magetsi azitha kutentha kwambiri komanso kukana kwambiri kuwonongeka kwa ma radiation, pomwe kuchuluka kwake kwamafuta kumachepetsedwa (~ 4.0 × 10 ⁻⁶/ K) zimathandizira kukana kwapadera kwa kutentha kwamphamvu.
Zinthu zamkati izi zimasungidwanso pakutentha kopitilira 1600 °C, kulola SiC kusunga umphumphu wa zomangamanga pansi pa kukhudzana kwachindunji kwa nthawi yaitali ndi zitsulo zosungunuka, okoma mtima, ndi mpweya wokhazikika.
Mosiyana ndi oxide porcelains monga aluminiyamu, SiC sichimayankha mwachangu ndi kaboni kapena mtundu wa eutectics otsika kwambiri pochepetsa ma ambience., Ubwino wofunikira pakuwongolera zitsulo ndi semiconductor.
Pamene amapangidwa kukhala crucibles– ziwiya zopangidwa kuphatikiza ndi zinthu zofunda– SiC imaposa zida zachikhalidwe monga quartz, graphite, ndi aluminiyamu mu zonse zomwe amayembekeza kukhala ndi moyo komanso umphumphu.
1.2 Microstructure ndi Mechanical Security
Kuchita kwa ma crucibles a SiC kumangiriridwa mosamala ndi ma microstructure awo, zomwe zimadalira njira yopangira ndi zosakaniza zomwe zimagwiritsidwa ntchito.
Ma crucibles a refractory-grade amapangidwa pogwiritsa ntchito kulumikiza mayankho, kumene ma porous carbon preforms amalowetsedwa ndi silicon yosungunuka, kupanga β-SiC kudzera poyankha Si(l) + C(s) → SiC(s).
Izi zimapanga kaphatikizidwe ka SiC yoyambira yokhala ndi silicon yotsalira yotsika mtengo (5– 10%), zomwe zimawonjezera kutenthetsa kwamafuta koma zimatha kuletsa kugwiritsidwa ntchito mopitilira 1414 °C(kusungunuka kwa silicon).
Mosiyana ndi zimenezo, Sintered SiC crucibles amapangidwa kudzera mu solid-state kapena madzi-gawo sintering pogwiritsa ntchito boron ndi carbon kapena alumina-yttria zowonjezera., kukhala pafupi ndi kachulukidwe ka malingaliro ndi chiyero chokulirapo.
Izi zikuwonetsa kukana kwamphamvu kwambiri komanso chitetezo cha okosijeni komabe ndizokwera mtengo komanso zovuta kupanga zazikuluzikulu..
( Silicon Carbide Crucibles)
Wopangidwa bwino, interlacing microstructure ya sintered SiC imapereka kukana kwapadera kwa kutopa kwamafuta ndi kuwonongeka kwamakina., Chofunika kwambiri pamene mukugwira silicon yamadzimadzi, germanium, kapena III-V mankhwala mu njira zopangira kristalo.
Mapangidwe amalire ambewu, kuphatikizapo kulamulira magawo achiwiri ndi porosity, zimagwira ntchito yofunikira pakukhazikitsa kukhazikika kokhazikika pansi pa kutentha kozungulira komanso malo amphamvu amankhwala.
2. Kutentha Kwambiri ndi Kukaniza Kwachilengedwe
2.1 Thermal Conductivity ndi Kugawira Ofunda
Chimodzi mwazabwino zopangira ma SiC crucibles ndi kuchuluka kwawo kwamafuta, zomwe zimalola kusuntha kwachangu komanso kofananako nthawi yonse yotentha kwambiri.
Mosiyana ndi otsika-conductivity mankhwala monga Integrated silica (1– 2 W/(m · k)), SiC imabalalitsa bwino mphamvu zamatenthedwe pakhoma la crucible, kuchepetsa malo otentha komanso matenthedwe a kutentha.
Kugwirizana kumeneku ndikofunikira munjira monga kukhazikika kwa silicon ya multicrystalline kwa photovoltaics, kumene kutentha mlingo homogeneity molunjika amakhudza kristalo wapamwamba ndi chilema makulidwe.
Kuphatikizika kwa ma conductivity apamwamba komanso kuchepa kwa kuchuluka kwa kutentha kumapangitsa kuti pakhale chiwopsezo champhamvu kwambiri. (R = k(1 -n)a/p), kupanga ma SiC crucibles kuti asavutike pakuwotha mwachangu kunyumba kapena kuzizira.
Izi zimathandiza kuti mofulumira Kutentha dongosolo ramp mitengo, kupititsa patsogolo, ndi kuchepetsa nthawi yopuma chifukwa cha kulephera kwakukulu.
Komanso, Kuthekera kwa zinthuzo kuyimirira panjinga yotentha mobwerezabwereza popanda kuwonongeka kwakukulu kumapangitsa kuti ikhale yoyenera kukonzedwa muzotenthetsera zamalonda zomwe zikuyenda pamwamba. 1500 °C.
2.2 Oxidation ndi Chemical Compatibility
Pakutentha kokwera mumlengalenga, SiC imadutsa mosavuta oxidation, kupanga chitetezo chosanjikiza cha silika amorphous (SiO TWO) pamwamba pake: SiC + 3/2 O ₂ → SiO TWO + CO.
Izi glazed wosanjikiza densifies pa kutentha kwambiri, imagwira ntchito ngati chotchinga chosokoneza chomwe chimachepetsa makutidwe ndi okosijeni komanso kuteteza maziko a ceramic.
Komabe, m'malo ocheperako kapena m'malo opanda vacuum– kawirikawiri mu semiconductor ndi zitsulo kuyenga– oxidation imachotsedwa, ndipo SiC ikupitilizabe kukhala yosasunthika motsutsana ndi silicon yosungunuka, aluminiyumu yopepuka, ndi slags zambiri.
Imakana kusungunuka ndi kuyankha ndi silicon yamadzimadzi mpaka 1410 °C, ngakhale kuwonetsetsa kwakutali kumatha kubweretsa kunyamula kwa kaboni pang'ono kapena mawonekedwe owoneka bwino.
Mwachidule, SiC sipereka kuipitsidwa kwazitsulo muzosungunula zosalimba, Chofunikira chofunikira pakupanga ma silicon amtundu wamagetsi komwe kuipitsidwa ndi Fe, Ku, kapena Cr iyenera kusungidwa pansi pa milingo ya ppb.
Komabe, kusamala kuyenera kutengedwa pokonza zitsulo zamchere zamchere kapena ma oxides omvera kwambiri, monga ena amatha kuvala SiC pamilingo yotentha kwambiri.
3. Njira Zopangira ndi Kuwongolera Ubwino
3.1 Njira Zomangamanga ndi Dimensional Control
Kupanga kwa SiC crucibles kumaphatikizapo kupanga, kuyanika, ndi kutentha kwambiri kwa sintering kapena kugwa, ndi njira zosankhidwa potengera ungwiro wofunikira, kukula, ndi ntchito.
Njira zopangira nthawi zambiri zimaphatikizapo kukanikiza kwa isostatic, extrusion, ndi kufalikira kwa slide, Iliyonse ikupereka milingo yolondola kwambiri komanso yofananira pang'ono.
Kwa ma crucibles akuluakulu omwe amagwiritsidwa ntchito pofalitsa ingot ya solar, kukanikiza kwa isostatic kumatsimikizira makulidwe a khoma komanso makulidwe ake, kuchepetsa chiopsezo cha kukula kosiyana kwa kutentha ndi kulephera.
Reaction-bonded SiC (Mtengo wa RBSC) ma crucibles ndi otsika mtengo ndipo amagwiritsidwa ntchito nthawi zambiri m'misika yoyendera dzuwa, ngakhale mobwerezabwereza zoletsa silicon pazipita yankho kutentha.
Sintered SiC (SSiC) Mabaibulo, pomwe zokwera mtengo, chita ukhondo wodabwitsa, kulimba, ndi kukana kugunda kwa mankhwala, kuwapanga kukhala oyenera kugwiritsa ntchito zamtengo wapatali monga GaAs kapena InP crystal development.
Kukonzekera kolondola pambuyo pa sintering kumatha kuyitanidwa kuti mukwaniritse zolimba, makamaka pamiyendo yomwe imagwiritsidwa ntchito poundana motsetsereka (Zithunzi za VGF) kapena Czochralski (CZ) machitidwe.
Kutsiliza kwa malo apamwamba ndikofunikira kuti muchepetse malo opangira ma nucleation a zolakwika ndikuwonetsetsa kusungunuka kosalala nthawi yonse yofalikira.
3.2 Kuwongolera Ubwino ndi Kutsimikizira Kuchita Bwino
Chitsimikizo cholimba chaubwino ndikofunikira kuti muwonetsetse kudalirika komanso moyo wautali wazitsulo za SiC pansi pakufunika kogwirira ntchito..
Njira zowunikira zosawononga monga ultrasound screening ndi X-ray tomography zimagwiritsidwa ntchito kuti muwone kugawanika kwamkati., mipata, kapena makulidwe osiyanasiyana.
Kusanthula kwamankhwala pogwiritsa ntchito XRF kapena ICP-MS kumatsimikizira kutsika kwazitsulo zazitsulo, pamene matenthedwe matenthedwe ndi mphamvu zosinthika zimatsimikiziridwa kuti zitsimikizire kusasinthasintha kwa mankhwala.
Ma Crucibles nthawi zambiri amayesedwa moyerekeza ndi njinga zamoto asanabadwe kuti adziwe zomwe zingalephereke..
Set traceability ndi kuvomerezeka ndizofala mu semiconductor ndi ma aerospace supply chain, kumene kulephera kwa gawo kungabweretse kutayika kwamtengo wapatali.
4. Mapulogalamu ndi luso laukadaulo
4.1 Semiconductor ndi Photovoltaic Industries
Silicon carbide crucibles amagwira ntchito yofunika kwambiri popanga silicon yoyera kwambiri pama cellelectronics ndi ma solar..
Mu ng'anjo zolimba zowongolera zama multicrystalline photovoltaic ingots, zitsulo zazikulu za SiC zimakhala ngati chidebe choyambirira cha silicon yosungunuka, kupititsa patsogolo kutentha 1500 ° C kwa maulendo angapo.
Kusakhazikika kwawo kwamankhwala kumayimitsa kuipitsidwa, while their thermal security ensures consistent solidification fronts, leading to higher-quality wafers with less misplacements and grain boundaries.
Some manufacturers coat the internal surface area with silicon nitride or silica to additionally decrease bond and facilitate ingot release after cooling down.
In research-scale Czochralski growth of compound semiconductors, smaller sized SiC crucibles are made use of to hold thaws of GaAs, InSb, or CdTe, where marginal reactivity and dimensional security are critical.
4.2 Metallurgy, Factory, ndi Emerging Technologies
Beyond semiconductors, SiC crucibles are indispensable in steel refining, alloy preparation, and laboratory-scale melting procedures involving aluminum, mkuwa, and rare-earth elements.
Kukaniza kwawo kunjenjemera kwamafuta ndi kukokoloka kumawapangitsa kukhala oyenera kuyika makina otenthetsera ndi kukana m'malo oyambira, komwe amakhala ndi njira zina za graphite ndi alumina mozungulira zingapo.
Powonjezera kupanga zitsulo zomvera, Zotengera za SiC zimagwiritsidwa ntchito mu vacuum cleaner induction induction kusungunula kuti zisawonongeke komanso kuipitsidwa..
Ntchito zomwe zikubwera zimakhala ndi ma activator osungunuka amchere ndi makina opangira mphamvu ya dzuwa, kumene zombo za SiC zingaphatikizepo mchere wotentha kwambiri kapena zitsulo zamadzimadzi zosungirako mphamvu zotentha.
Ndi chitukuko mosalekeza mu sintering luso ndi chophimba kamangidwe, Ma SiC crucibles ali okonzeka kuthandizira kukonzanso zinthu zam'badwo wotsatira, kupangitsa kukhala kotheka kuyeretsa, kothandiza kwambiri, ndi scalable malonda matenthedwe machitidwe.
Mukubwereza, ma silicon carbide crucibles amayimira ukadaulo wololeza ukadaulo mu kaphatikizidwe kazinthu zotentha kwambiri, kuphatikiza matenthedwe odabwitsa, makina, ndi kugwiritsa ntchito mankhwala mu gawo limodzi lopangidwa mwaluso.
Kutengera kwawo kofala mu semiconductor yonse, dzuwa, ndi mafakitale opangira zitsulo amawunikira ntchito yawo monga maziko a zoumba zamalonda zamakono.
5. Wogulitsa
Advanced Ceramics idakhazikitsidwa pa Okutobala 17, 2012, ndi bizinesi yapamwamba yodzipereka ku kafukufuku ndi chitukuko, kupanga, kukonza, malonda ndi ntchito zaukadaulo za zida za ceramic ndi zinthu. Zogulitsa zathu zikuphatikiza, koma osati zokha za Boron Carbide Ceramic Products, Boron Nitride Ceramic Products, Silicon Carbide Ceramic Products, Silicon Nitride Ceramic Products, Zirconium Dioxide Ceramic Products, ndi zina. Ngati muli ndi chidwi, chonde omasuka kulankhula nafe.
Tags: Silicon Carbide Crucibles, Silicon Carbide Ceramic, Silicon Carbide Ceramic Crucibles
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