Indlela yokwenza ama-crucibles

Njengethuluzi elibalulekile kubuchwepheshe besimanje bokusakaza,i-silicon carbide cruciblekancane kancane isibe isitsha esithandwayo sokuncibilikisa insimbi engeyona ayoni ngenxa yokusebenza kwayo okuhle kakhulu kanye nempahla eyingqayizivele. Ikakhulukazi lapho kucutshungulwa ukuncibilika kwensimbi okunezinga lokushisa eliphezulu, ama-silicon carbide crucibles abonisa uchungechunge lwezinzuzo ezibalulekile zobuchwepheshe. Lesi sihloko sizokwethula ngokuningiliziwe izici zokusebenza ze-silicon carbide crucibles, ukusetshenziswa kwayo ezinqubweni zokuphonsa, kanye nendlela yokuhlinzeka ngezixazululo eziphumelelayo nezithembekile zezinkampani zanamuhla zokuphonsa.

1. Iyini i-silicon carbide crucible?
I-Silicon carbide crucible iyisitsha esinezinga eliphezulu lokushisa sisebenzisa i-silicon carbide (SiC) njengento eyinhloko eluhlaza. Isetshenziselwa ikakhulukazi ukuncibilikisa nokucubungula izinsimbi ezihlukahlukene nama-alloys. I-Silicon carbide iyimpahla yokwenziwa enobulukhuni obuphakeme kakhulu nokumelana nokushisa. Isetshenziswa kabanzi emikhakheni yobuchwepheshe obuphezulu efana ne-ceramics, i-metallurgy, nama-semiconductors.

Ngenxa yokuthi i-silicon carbide crucibles inezakhiwo ezinhle kakhulu zomzimba namakhemikhali ezifana nokuhamba okuphezulu kwe-thermal, i-coefficient ephansi yokwandisa ukushisa okushisayo, nokumelana nokugqwala, kubonisa ukuzinza nokuqina okungenakuqhathaniswa ngaphansi kwamazinga okushisa aphezulu nezimo ezimbi kakhulu.

2. Izinzuzo zezobuchwepheshe ze-silicon carbide crucible
1. Ukumelana nokushisa okuphezulu okuhle kakhulu
I-silicon carbide crucibles inokumelana nokushisa okuphezulu kakhulu futhi ingamelana namazinga okushisa angaphezu kuka-1600°C. Lokhu kuzenza zilungele ukuncibilikisa izinsimbi ezisezingeni eliphezulu ezifana nethusi, i-aluminium ne-nickel. Uma kuqhathaniswa ne-crucibles eyenziwe ngezinye izinto, amandla e-silicon carbide crucibles awanciphi kakhulu ngaphansi kwezimo zokushisa eziphakeme, ukuqinisekisa ukuzinza kwawo komumo ngesikhathi senqubo yokuncibilika.

Lokhu kumelana okuhle kakhulu kwezinga lokushisa eliphezulu kusiza izinkampani zigweme ama-crucibles ekuwohlokeni noma ekuqhekekeni ngenxa yamazinga okushisa aphezulu, ngaleyo ndlela kuthuthukiswe ukuqhubeka kokukhiqiza nokusebenza kahle.

2. Excellent conductivity ezishisayo
Esinye isici esiphawulekayo se-silicon carbide impahla yi-conductivity yayo ephezulu yokushisa, evumela ukudluliswa okusheshayo ngisho nokushisa. Lokhu kusho ukuthi phakathi nenqubo yokuncibilika, insimbi encibilikisiwe ingafinyelela ngokushesha izinga lokushisa elidingekayo, inciphise isikhathi sokuncibilika futhi ithuthukise ukusebenza kahle kokukhiqiza.

Lokhu kuqhutshwa kokushisa okusebenzayo futhi kunciphisa ukushisisa kwensimbi encibilikisiwe, kusiza ukuzuza ukulawulwa kwezinga lokushisa okunembe kakhudlwana phakathi nenqubo yokuphonsa kanye nokuqinisekisa ikhwalithi yokuphonsa engaguquki.

3. I-coefficient ephansi yokwandisa okushisayo
I-coefficient yokunwetshwa kwe-thermal ibhekisela ezingeni into ekhula ngayo ngevolumu lapho ishiswa. I-silicon carbide ine-coefficient ephansi kakhulu yokwanda okushisayo, okusho ukuthi ishintsha usayizi omncane kakhulu uma ishiswa. Ngakho-ke, ngisho nasendaweni enokuguquguquka okukhulu kwezinga lokushisa, i-silicon carbide crucible ingagcina isimo sayo sokuqala futhi igweme ukuqhekeka noma ukulimala ngenxa yokwanda noma ukufinyela.

Ukunwetshwa kwe-thermal okuphansi kulungele ikakhulukazi izinqubo zokusakaza ezibandakanya imijikelezo yokushisa neyokupholisa njalo, okunweba kakhulu impilo yesevisi ye-crucible.

4. Ukumelana nokugqwala okuhle kakhulu
Phakathi nenqubo yokuncibilika, insimbi encibilikisiwe isabela ne-crucible, kancane kancane igugule indawo yayo. Kodwa-ke, impahla ye-silicon carbide inokumelana nokugqwala kwamakhemikhali okuhle kakhulu futhi ingamelana ngempumelelo nokuguguleka koketshezi lwensimbi, ikakhulukazi lapho isebenza nezinsimbi ezisebenza kakhulu njengethusi ne-aluminium.

Ukumelana nokugqwala okuhle akugcini nje ngokunweba impilo yesevisi ye-crucible, kodwa futhi kunciphisa ukungcoliswa kokungcola okubangelwa ukugqwala endaweni ebethelekayo, kuqinisekisa ukuhlanzeka koketshezi lwensimbi nokuthuthukisa ikhwalithi yomkhiqizo wokugcina.

5. Amandla aphezulu emishini
I-silicon carbide crucibles igcina amandla aphezulu emishini ngisho nasemazingeni okushisa aphezulu, okwenza kube mancane amathuba okuphuka noma ukonakala. Lesi sici samandla aphezulu senza i-crucible imelane nomthelela wensimbi encibilikisiwe kanye nokucindezeleka kwangaphandle kwemishini, ukugcina ukuqina kwesakhiwo ngesikhathi sokuncibilika kwezinga lokushisa eliphezulu.

6. Ukuzinza okuhle kokuthuthumela okushisayo
Ukuzinza kokushaqeka kwe-thermal kusho ikhono lempahla ukumelana nokuqhekeka lapho izinga lokushisa lishintsha ngokushesha. I-silicon carbide crucibles ibonisa ukuzinza okuhle kakhulu kokushaqeka okushisayo futhi iyakwazi ukumelana nokushintsha kwezinga lokushisa ngokushesha ngaphandle kokuqhekeka. Lokhu kubaluleke kakhulu ezinqubweni zokusakaza ezidinga ukushisa nokupholisa njalo.

ezintathu. Ukusetshenziswa kwe-silicon carbide crucible
Ngenxa yokumelana kwayo nokushisa okuphezulu okuvelele, ukuqhutshwa kokushisa okushisayo, nokumelana nokugqwala, ama-silicon carbide crucibles asetshenziswa kakhulu ezinqubweni ezihlukahlukene zokuncibilikisa nokuphonsa insimbi, ikakhulukazi ekuncibilikisweni kwezinsimbi ezingenayo insimbi nama-alloys. Okulandelayo yizimo zohlelo lokusebenza ezimbalwa ezijwayelekile:

Ukubunjwa kwethusi: Lapho kuncibilikiswa ithusi,i-silicon carbide crucibles ingagcina iyunifomu yokushisa encibilikayo, inciphise ukwakheka kokungcola, futhi ithuthukise ikhwalithi yezingxenye zethusi.
Ukuncibilika kwe-aluminium ne-aluminium alloy: I-aluminium isabela kalula nge-crucible phakathi nenqubo yokuncibilikisa, kodwa ukumelana nokugqwala kwe-silicon carbide kuvikela ngempumelelo i-crucible ekugqwaleni kwe-aluminium futhi inwebe impilo yayo yesevisi.
Okunye ukuncibilikiswa kwezinga lokushisa eliphezulu: I-Silicon carbide crucible nayo ifanele ukuncibilikisa izinsimbi ezisezingeni lokushisa eliphezulu njenge-zinc ne-nickel, futhi inokuvumelana nezimo okuqinile.

Ezine. Ukusetshenziswa nokugcinwa kwe-silicon carbide crucible
Ukwandisa impilo yesevisi ye-silicon carbide crucibles, ukusetshenziswa okulungile nokunakekelwa kubalulekile. Nazi ezinye iziphakamiso:

Shisisa i-crucible: Ngaphambi kokusetshenziswa kokuqala noma ukuphinda usebenzise, ​​kunconywa ukuthi ushise kancane kancane i-crucible ibe izinga lokushisa elisebenzayo ukuvimbela ukushisa okungazelelwe nokugqashuka.
Gwema ukushisisa nokupholisa okusheshayo: Nakuba iziphambano ze-silicon carbide zinokuzinza okuhle kokuthuthumela, ukuguquka kwezinga lokushisa okusheshayo kusengalimaza i-crucible.
Ukuhlola okuvamile: Ngesikhathi sokusetshenziswa, hlola njalo indawo ebhobokayo ukuze uthole izimpawu zokuqhekeka noma ukugqwala, futhi uxazulule izinkinga ezingaba khona ngesikhathi.