Ukukhetha I-Graphite Crucible Efanele Yokukhula Kwekristalu: Umhlahlandlela Owusizo

Ezweni le-ukukhula kwekristalu—kungakhathaliseki ukuthi i-SiC, i-GaN, i-sapphire, noma ezinye izinto ezithuthukisiwe—i-graphite crucible ayiyona nje isitsha. Iwumngcele wokushisa, isikhombimsebenzisi sokusabela, kanye nomlindi wesango ukuze kube nobumsulwa. Ukukhetha i-crucible efanele kungathinta kakhulu isivuno, ikhwalithi yekristalu, kanye nokuqina kwesithando somlilo.

Lo mhlahlandlela usiza onjiniyela bezinqubo, amaqembu e-R&D, kanye nabaphathi bokuthenga ukuthi baqonde izici ezibalulekile lapho bekhetha izitsha ze-graphite zokukhula kwekristalu okushisa okuphezulu.

Kungani Izitsha Zokubumba Ze-Graphite Ziyindinganiso Yemboni

I-Graphite isetshenziswa kabanzi ekukhuleni kwekristalu ngenxa yezizathu zayo ezilandelayo:

• Ukushisa okuphezulu kanye nokusatshalaliswa kokushisa okufanayo

• Ukumelana okuhle kakhulu nokushaqeka kokushisa, ikakhulukazi ekujikelezeni kwezinga lokushisa eliphezulu

• Ukwenziwa ngokwezifiso kwamajiyometri ayinkimbinkimbi nokuhlanganiswa nezinhlelo ezimboziwe (isb., i-SiC noma i-TaC coatings)

• Izindleko eziphansi kakhulu uma kuqhathaniswa nezinsimbi zensimbi noma ama-alloy aphikisayo

Kodwa ayiphelele. I-Graphite ingasabela kumagesi azungezile, i-sublimate emazingeni okushisa aphezulu, futhi ikhiphe ukungcola uma ingahlanzwanga kahle noma ingagqokwanga kahle.(1)

Izinto Ezibalulekile Okufanele Uzicabangele Lapho Ukhetha I-Crucible

1. Ububanzi Bokushisa Nokuqina

• I-graphite ejwayelekile ingaphatha kufika ku-~2000°C, kodwa ukuze kukhule i-SiC (>2200°C), izinto ezimboziwe (isib. i-TaC, i-SiC) zibalulekile.
• Ukuze kube nokukhula okude, ukuzinza kobukhulu kanye nokumelana nokukhukhuleka kubalulekile.

2. Ukuhambisana kwezinto ezibonakalayo

• Ingabe le nqubo ihilela i-Si, i-C, ama-halogens, noma i-hydrogen? Ngayinye ingahlasela i-graphite ngendlela ehlukile.
• Izinqubo ezisekelwe ku-Si zivame ukuzuza ngezingubo ze-SiC ukuvimbela ukungcola nokugqwala.

3. Ukulawula Ubumsulwa Nokungcola

• I-graphite ehlanzekile kakhulu (>99.99%) iyimfuneko kuma-electronics anamandla kanye nama-semiconductor substrates.
• Cabanga ngezinto ezimboziwe lapho ukufuduka kwezinto (isb., B, Al, Fe) kungalimaza ikhwalithi yekristalu.

4. Uhlobo Lokumboza

• Ukugqoka kwe-SiC: Okuvamile ekukhuleni kwekristalu ye-SiC; ukufana okuhle kokushisa, okungasebenzi kahle kwamakhemikhali
• I-TaC Coating: Yamazinga okushisa aphezulu kakhulu; inikeza isithiyo sokugqwala nokusabalalisa okungcono
• Izembozo Ezihlanganisiwe: Izixazululo ezenziwe ngokwezifiso zezindlela ezithile zokusabela kwesigaba segesi

5. Iphrofayili Yokushisa Nokuhlanganiswa Kwesithando Somlilo

• I-geometry ye-Crucible ithinta ukufana kwezinga lokushisa kanye nokuqina kwendawo yokukhula.
• Lungiselela ukwakheka kwe-crucible ngokusekelwe ekulingiseni indawo eshisayo kanye nokumodela kwe-CFD.

Izingibe Ezivamile Okufanele Zigwenywe

• Ukusebenzisa i-graphite engagqokwanga ezindaweni ezinolaka: Ukuwohloka okusheshayo, ukungcola, kanye nokungaphindaphindeki kahle.

• Ukunciphisa ubukhulu noma ukufana kwesembozo: Ukumbozwa okuncane noma okungaguquguquki kuholela ekuhlulekeni kwangaphambi kwesikhathi.

• Ukunganaki ukungalingani kokukhula kokushisa: Ukuqhekeka noma ukuhlukaniswa kwemijikelezo emide ngenxa yokungafani kwe-coating/base.

Amathiphu Okunakekela Nokuphila

• Bhaka izitsha zokubhaka kusengaphambili ngaphambi kokusebenzisa okokuqala ukuze unciphise ukuphuma kwegesi.

• Hlola njalo ubuqotho bokumboza ngemva kokugijima ngakunye, ikakhulukazi imiphetho namakhona.

• Landelela inani lomjikelezo wokubethelwa kanye nephethini yokuwohloka—akuwona wonke amaphutha abonakala ngaphandle.

Izincomo Eziqondene Nohlelo Lokusebenza