I-Silicon Carbide (SiC) Powder : Izakhiwo, Izicelo Zezimboni

Kubathengi bamazwe ngamazwe kanye nabaphathi bokuthengwa kwempahla, ukuqonda ama-nuances we-silicon carbide powder akuyona nje imfuneko yezobuchwepheshe-kuyisidingo sokuncintisana. Kungakhathaliseki ukuthi isetshenziswa njenge-deoxidizer ekwenzeni insimbi, i-abrasive ephezulu yokusebenza, noma ingxenye ebalulekile kugesi wamandla wemoto kagesi (EV), i-SiC inikeza inhlanganisela eyingqayizivele yobulukhuni, ukuqhutshwa kwe-thermal, nokuzinza kwamakhemikhali.

Iyini i-Silicon Carbide (SiC)?

I-Silicon carbide iyi-semiconductor ehlanganisiwe eyakhiwe i-silicon ne-carbon. Emvelweni, ayivamile kakhulu, itholakala kuphela ngamanani amancane ezinhlotsheni ezithile zama-meteorite namadiphozithi e-corundum. Ngakho-ke, cishe yonke i-silicon carbide esetshenziswa embonini ikhiqizwa ngokwenziwa.

I-Crystal Structure

I-SiC ihlukile ngoba ibonisa i-polymorphism, okusho ukuthi ingaba khona ngamafomu angaphezu kwama-crystalline angu-250. Izakhiwo ezivame kakhulu zihlanganisa:

I-Alpha Silicon Carbide (α-SiC): I-polymorph evamile, ebonakala ngesakhiwo sekristalu esinezinhlangothi ezine. Iyazinzile emazingeni okushisa angaphezu kuka-1700°C.

I-Beta Silicon Carbide (β-SiC): Leli fomu linesakhiwo se-cubic crystal (elifana nedayimane) futhi lakhiwe emazingeni okushisa angaphansi kuka-1700°C.

Izakhiwo Ezibalulekile Zomzimba Nezamakhemikhali

Kungani i-SiC powder ifunwa kangaka? Amamethrikhi ayo okusebenza awaqhathaniswa:

Ukuqina Okudlulele: Ngokuqina kwe-Mohs okungu-9.0 kuya ku-9.5, kungokwesibili ngemva kwedayimane ne-boron carbide.

I-High Thermal Conductivity: I-SiC ihlakaza ukushisa ngokushesha kunezinsimbi eziningi, iyenze ilungele izindawo ezinezinga lokushisa eliphezulu.

I-Low Thermal Expansion: Imelana nokungqubuzana noma ukuqhekeka ngaphansi kwezinguquko zezinga lokushisa okungazelelwe (ukumelana nokushaqeka okuhle kakhulu kokushisa).

I-Chemical Inertness: Imelana kakhulu nokugqwala okuvela kuma-asidi, ama-alkali, nosawoti oncibilikisiwe, ngisho nasemazingeni okushisa aphakeme.

Izakhiwo Ze-Semiconducting: Ngokungafani namanye ama-abrasives amaningi, i-SiC iyi-wide-bandgap semiconductor, eyenza izinguquko embonini ye-electronics yamandla.

Inqubo Yokukhiqiza: Indlela ye-Acheson kanye nangaphezulu

Ukukhiqizwa kokuhlanzeka okuphezului-silicon carbide powderkuyinqubo edinga imali eningi futhi enesisindo esindayo.

I-Acheson Process

Yaqanjwa ngu-Edward Goodrich Acheson ngo-1891, lena iseyindlela eyinhloko yokukhiqiza okukhulu.

Izinto ezisetshenziswayo: Isihlabathi se-silica esihlanzekile (SiO2) kanye ne-petroleum coke (C) kuxutshwe. Kwezinye izimo, ama-sawdust nosawoti ayengezwa ukulawula i-porosity futhi asuse ukungcola.

Isithando somlilo sikagesi: Ingxube ifakwa esithandweni sokumelana. Amandla kagesi adlula kumongo wegraphite, ashisise ingxube ezungezile emazingeni okushisa aphakathi kuka-1,700°C no-2,500°C.

Ukusabela Kwamakhemikhali: Ukusabela kwe-SiO2 + 3C → SiC + 2CO kwenzeka.

Ukuvuna: Uma isithando somlilo sesipholisa, kwakheka inqwaba enkulu "yesilinda" yamakristalu e-SiC. Umnyombo uqukethe ukuhlanzeka okuphezulu kakhulu (i-Green SiC), kuyilapho izingqimba zangaphandle zikhiqiza i-Black SiC.

Icubungula ibe Impushana

Uma amakristalu aluhlaza esevuniwe, angena ezigabeni ezimbalwa zokucutshungulwa:

Ukuchoboza nokugaya: Ukusebenzisa izigayo zemihlathi, izigayo zesando, noma izigayo zamabhola ukunciphisa amakristalu abe yimpushana.

Ukulinganisa (Usayizi): Ukusebenzisa izikrini ezidlidlizayo noma izihlukanisi zomoya ukuze kuqinisekiswe ukuthi impushana ihlangabezana nosayizi abathile begrit (isb., i-FEPA, JIS, noma amazinga e-ANSI).

Ukugeza nokuhlanzwa kwe-Acid: Ukukhipha insimbi esele, i-silicon yamahhala, noma i-carbon, impushana ivame ukuphathwa ngamakhemikhali ukuze ifinyelele amazinga okuhlanzeka ka-98% kuya ku-99.9%.

I-Black vs. Green Silicon Carbide: Ukuqonda Umehluko

Emakethe yomhlaba, i-SiC powder ngokuvamile ihlukaniswa ngombala wayo, obonisa ubumsulwa bayo kanye nokusetshenziswa okuhlosiwe.

I-Black Silicon Carbide (Black SiC)

I-Black SiC iqukethe cishe u-95% kuya ku-98% we-SiC. Umbala wayo omnyama ungenxa yokulandela amanani ensimbi ne-carbon ukungcola.

Izici: Iqinile kancane kodwa i-brittle kancane kune-SiC eluhlaza.

Okungcono Kakhulu: Ukugaya izinto zamandla aqine kakhulu njengensimbi ekhonjiwe, izinsimbi ezingenayo insimbi (ithusi, i-aluminium), nezinto ezingezona ezensimbi (itshe, irabha, ukhuni). Futhi kuyisinqumo esiyinhloko se-metallurgical deoxidization.

I-Silicon Carbide Ehlaza (Green SiC)

I-Green SiC iwukuhluka kokuhlanzeka okuphezulu, okuvamise ukudlula okuqukethwe kwe-SiC okungu-99%.

Izici: Ukuqina okuphezulu namandla okusika aphakeme uma kuqhathaniswa ne-SiC emnyama.

Okungcono Kakhulu: Ukugaya okunembayo kwezinto eziqinile neziphukayo ezifana ne-tungsten carbide, ingilazi yokubona, izitsha zobumba, namawafa e-semiconductor.

Izicelo Eziyinhloko Zezimboni

I-Metallurgy kanye nokwenza insimbi

Embonini ye-metallurgical, i-SiC powder isebenza njenge-deoxidizer enamandla kanye nomthombo wamafutha kuma-cupolas nama-arc furnaces kagesi.

Izinzuzo: Ithuthukisa uketshezi lwensimbi encibilikisiwe, ithuthukise amazinga e-silicon kanye ne-carbon recovery, futhi inciphise ukusetshenziswa kwamandla okuphelele kwenqubo yokuncibilika.

I-Cast Iron Production: Ikhuthaza ukwakheka kwama-graphite flakes, okuholela ekubunjweni kwezinga eliphezulu okumpunga kanye ne-ductile iron.

Ama-Abrasives kanye ne-Surface Finishing

Lokhu mhlawumbe ukusetshenziswa kwendabuko kwe-SiC powder.

Ama-Bonded Abrasives: Asetshenziselwa ukukhiqiza amasondo okugaya nama-cutting disc.

Ama-Abrasives Ahlanganisiwe: Asetshenziswa kuma-sandpaper namabhande okupholisha.

I-Lapping&Polisha:Izimpushana ezinhle ze-SiC zisetshenziswa"kuma-slurries"ukuxhumanisa ngokunemba kwamavalvu, amagiya, nama-semiconductor substrates.

Refractories kanye Ceramics

Ngenxa yezinga layo eliphezulu lokuncibilika (lincibilika cishe cishe ku-2,700°C) kanye nokunwebeka okuphansi kokushisa, i-SiC iyimpahla ephikisayo ephambili.

Ifenisha Yekhishi: Amapuleti e-SiC nemishayo asetshenziswa kumahhani e-ceramic ngoba awawohloki ngaphansi kwemithwalo esindayo emazingeni okushisa aphezulu.

I-Technical Ceramics: Isetshenziswa kumavesti angangenwa izinhlamvu, izindandatho zokuvala amaphampu, nama-brake discs ezimoto.

I-Advanced Electronics(I-SiC Revolution)

Ikhulu lama-21 libone ukwanda kwesidingo se-SiC embonini ye-semiconductor.

Amadivayisi Amandla:Ama-MOSFET asekelwe ku-SiC nama-diode asebenza kahle kakhulu kunezingxenye ze-silicon zendabuko.Abalulekile ezinhlelweni zokushaja ngokushesha nama-inverter Ezimotweni zikagesi(EVs).

Ingqalasizinda ye-5G:I-SiC isebenza njengengxenye ye-Gallium Nitride(GaN) kumadivayisi we-SiC, anika amandla iziteshi eziyisisekelo ze-5G.

IGlobal Quality Standards for SiC Powder

Lapho kutholwaI-SiC powderemazweni ngamazwe, abathengi kufanele bazulazule kumasistimu wokugreda ahlukahlukene:

I-FEPA(Inhlangano Yabakhiqizi BaseYurophu Be-Abrasives):Isebenzisa iziqalo zika-"F"(kuma-abrasives ahlanganisiwe)kanye no-"P"(kuma-abrasives aboshwe)(isb.,F240,P1200).

I-JIS(Japanese Industrial Standard):Ijwayelekile ezimakethe zase-Asia(isb.,#3000).

I-ANSI(Isikhungo Samazinga Kazwelonke SaseMelika):Imiselwe imakethe yaseNyakatho Melika.

Amazinga okuhlanzeka abalulekile:

Ibanga Le-Metallurgical: 88% -95%SiC.

Ibanga Le-Abrasive: 96% -98.5%SiC.

Ukuhlanzeka Okuphezulu/Ibanga Lobumba:99%SiC.

I-silicon carbide powder ingaphezu kwe-abrasive elula.Iyinto yobuchwepheshe obuphezulu evala igebe phakathi kwemboni yendabuko esindayo kanye nekusasa lamandla ahlanzekile.Ngokuqonda amamaki ayo, izindlela zokukhiqiza, kanye nezicelo, ochwepheshe be-metallurgy kanye nochwepheshe bokuthenga bangaqinisekisa ukuthi bakhetha umkhiqizo olungile ukuze bathuthukise ukusebenza kwabo kanye nekhwalithi yomkhiqizo.