Ukwembula izakhiwo eziyingqayizivele kanye namathuba okusetshenziswa kwe-green silicon carbide micropowder
Ensimini yezinto zobuchwepheshe obuphezulu zanamuhla, i-green silicon carbide micropowder kancane kancane iba yinto ebalulekile emphakathini wesayensi yezinto ngezinto ngezakhiwo zayo eziyingqayizivele zomzimba nezamakhemikhali. Le nhlanganisela eyakhiwe ngezinto zekhabhoni ne-silicon ibonise amathuba amaningi okusetshenziswa emikhakheni eminingi yezimboni ngenxa yesakhiwo sayo esikhethekile sekristalu kanye nokusebenza okuhle kakhulu. Lesi sihloko sizohlola ngokujulile izakhiwo ezihlukile ze-green silicon carbide micropowder kanye namandla ayo okusetshenziswa emikhakheni ehlukahlukene.
1. Izici eziyisisekelo ze-micropowder eluhlaza ye-silicon carbide
I-Green silicon carbide (SiC) iyinto eqinile yokwenziwa futhi ingeyenhlanganisela ye-covalent bond. Isakhiwo sayo sekristalu sinikeza uhlelo olunezinhlangothi eziyisithupha olunelungiselelo elifana nedayimane. I-Green silicon carbide micropowder ivame ukubhekisela emikhiqizweni eyimpuphu enobubanzi bosayizi wezinhlayiya obungu-0.1-100 microns, futhi umbala wayo unikeza imibala ehlukahlukene kusukela eluhlaza okotshani obukhanyayo kuya koluhlaza okotshani ngenxa yokuhlanzeka okuhlukile nokuqukethwe kokungcola.
Kusukela esakhiweni esincane kakhulu, i-athomu ngayinye ye-silicon kukristalu ye-silicon carbide eluhlaza yakha ukuhlanganiswa kwe-tetrahedral nama-athomu amane e-carbon. Lesi sakhiwo se-covalent bond esinamandla sinikeza izinto ubulukhuni obuphezulu kakhulu kanye nokuqina kwamakhemikhali. Kubalulekile ukuqaphela ukuthi ubulukhuni be-Mohs be-silicon carbide eluhlaza bufinyelela ku-9.2-9.3, okwesibili kuphela ngemuva kwe-diamond kanye ne-cubic boron nitride, okwenza kube yinto engenakuphikwa emkhakheni we-abrasives.
2. Izakhiwo ezihlukile ze-green silicon carbide micropowder
1. Izakhiwo ezinhle kakhulu zemishini
Isici esiphawuleka kakhulu se-green silicon carbide micropowder ubulukhuni bayo obuphezulu kakhulu. Ubulukhuni bayo be-Vickers bungafinyelela ku-2800-3300kg/mm², okwenza isebenze kahle lapho icubungula izinto eziqinile. Ngesikhathi esifanayo, i-green silicon carbide nayo inamandla amahle okucindezela futhi isakwazi ukugcina amandla aphezulu omshini emazingeni okushisa aphezulu. Lesi sici senza kube nokwenzeka ukuyisebenzisa ezindaweni ezibucayi kakhulu.
2. Izakhiwo ezinhle kakhulu zokushisa
Ukushisa kwe-carbon carbide eluhlaza okwesibhakabhaka kuphakeme njengo-120-200W/(m·K), okuphindwe kathathu kuya kahlanu kunensimbi evamile. Lokhu kushisa okuhle kakhulu kwenza kube yinto efanelekile yokushabalalisa ukushisa. Okumangalisa nakakhulu ukuthi i-coefficient yokwandisa ukushisa kwe-carbon carbide eluhlaza okwesibhakabhaka ingu-4.0×10⁻⁶/℃ kuphela, okusho ukuthi inokuqina okuhle kakhulu lapho izinga lokushisa lishintsha, futhi ngeke ikhiqize ukuguquguquka okusobala ngenxa yokwanda nokuncipha kokushisa.
3. Ukuqina kwamakhemikhali okuvelele
Ngokuphathelene nezakhiwo zamakhemikhali, i-green silicon carbide ibonisa ukungangeni kahle okukhulu. Ingamelana nokugqwala kwama-acid amaningi, ama-alkali kanye nezixazululo zikasawoti, futhi ingahlala izinzile ngisho nasemazingeni okushisa aphezulu. Ukuhlolwa kubonisa ukuthi i-green silicon carbide isakwazi ukugcina ukuzinza okuhle endaweni ene-oxidizing ngaphansi kuka-1000℃, okwenza ibe namandla okusetshenziswa isikhathi eside ezindaweni ezine-corrosive.
4. Izakhiwo zikagesi ezikhethekile
I-carbide ye-silicon eluhlaza iyinto ebanzi ye-bandgap semiconductor enobubanzi be-bandgap obungu-3.0eV, obukhulu kakhulu kune-1.1eV ye-silicon. Lesi sici siyenza ikwazi ukumelana nama-voltage aphezulu kanye namazinga okushisa, futhi inezinzuzo ezihlukile emkhakheni wamadivayisi kagesi anamandla. Ngaphezu kwalokho, i-carbide ye-silicon eluhlaza nayo inokuhamba okuphezulu kwama-electron, okwenza kube nokwenzeka ukuthuthukisa amadivayisi anemvamisa ephezulu.
3. Inqubo yokulungiselela i-green silicon carbide micropowder
Ukulungiswa kwe-green silicon carbide micropowder kusebenzisa kakhulu inqubo ye-Acheson. Le ndlela ixuba isihlabathi se-quartz kanye ne-petroleum coke ngesilinganiso esithile bese ifudumeza ku-2000-2500℃ esithandweni sokumelana ukuze kutholakale impendulo. I-green silicon carbide ekhiqizwe yi-reaction idlula ezinqubweni ezifana nokuchoboza, ukuhlela, kanye nokukha amanzi ukuze kutholakale imikhiqizo ye-micropowder yobukhulu obuhlukene bezinhlayiya.
Eminyakeni yamuva nje, ngokuthuthuka kobuchwepheshe, kuye kwavela izindlela ezintsha zokulungiselela. I-Chemical vapor deposition (CVD) ingalungisa i-high-purity nano-scale green silicon carbide powder; indlela ye-sol-gel ingalawula ngokunembile usayizi wezinhlayiya kanye nesimo se-powder; indlela ye-plasma ingafinyelela ukukhiqizwa okuqhubekayo futhi ithuthukise ukusebenza kahle kokukhiqiza. Lezi zinqubo ezintsha zinikeza amathuba engeziwe okwenza ngcono ukusebenza kanye nokwandiswa kokusetshenziswa kwe-green silicon carbide micropowder.
4. Izindawo eziyinhloko zokusetshenziswa kwe-micropowder eluhlaza ye-silicon carbide
1. Ukugaya nokupholisha ngokunemba
Njenge-abrasive eqinile kakhulu, i-green silicon carbide micropowder isetshenziswa kabanzi ekucubungulweni ngokunembile kwe-carbide eqinisiwe, izinto zobumba, ingilazi nezinye izinto. Embonini ye-semiconductor, i-green silicon carbide powder ehlanzekile kakhulu isetshenziselwa ukupholisha ama-silicon wafers, futhi ukusebenza kwayo kokusika kungcono kunokwe-alumina abrasives yendabuko. Emkhakheni wokucubungula izingxenye ze-optical, i-green silicon carbide powder ingafinyelela ubulukhuni bendawo obuncane futhi ihlangabezane nezidingo zokucubungula izingxenye ze-optical ezinembile kakhulu.
2. Izinto zobumba ezithuthukisiwe
Impuphu ye-silicon carbide eluhlaza iyinto ebalulekile yokusetshenziswa ekulungiseleleni izinto zobumba ezisebenza kahle kakhulu. Izinto zobumba ezihlelekile ezinezakhiwo ezinhle kakhulu zomshini kanye nokuqina kokushisa zingenziwa ngezinqubo zokucindezela ngokucindezela okushisa noma zokusabela. Lolu hlobo lwezinto zobumba lusetshenziswa kabanzi ezingxenyeni ezibalulekile njengezimpawu zobumba, amabheringi, nama-nozzles, ikakhulukazi ezimweni zokusebenza ezinzima njengokushisa okuphezulu kanye nokugqwala.
3. Amadivayisi kagesi kanye ne-semiconductor
Emkhakheni wezinto zikagesi, i-green silicon carbide powder isetshenziselwa ukulungiselela izinto ze-semiconductor ezibanzi ze-bandgap. Amadivayisi kagesi asekelwe ku-green silicon carbide anezici zokusebenza ezisebenza ngemvamisa ephezulu, i-voltage ephezulu, kanye nokushisa okuphezulu, futhi abonisa amandla amakhulu ezimotweni ezintsha zamandla, ama-smart grid kanye neminye imikhakha. Izifundo zikhombisile ukuthi amadivayisi kagesi e-green silicon carbide anganciphisa ukulahlekelwa kwamandla ngaphezu kuka-50% uma kuqhathaniswa namadivayisi endabuko asekelwe ku-silicon.
4. Ukuqinisa okuhlanganisiwe
Ukwengeza i-silicon carbide powder eluhlaza njengesigaba sokuqinisa ku-metal noma i-polymer matrix kungathuthukisa kakhulu amandla, ubulukhuni kanye nokumelana nokuguguleka kwezinto ezihlanganisiwe. Emkhakheni wezindiza, izinhlanganisela ze-silicon carbide ezisekelwe ku-aluminium zisetshenziselwa ukukhiqiza izingxenye zesakhiwo ezilula nezinamandla aphezulu; embonini yezimoto, ama-brake pad aqiniswe yi-silicon carbide abonisa ukumelana okuhle kakhulu nokushisa okuphezulu.
5. Izinto zokumboza kanye nezinto zokumboza ezivuselela umoya
Kusetshenziswa ukuzinza kwezinga lokushisa eliphezulu kwe-silicon carbide eluhlaza, kungalungiswa izinto zokuphikisa ezisebenza kahle kakhulu. Embonini yokuncibilikisa insimbi, izitini zokuphikisa ze-silicon carbide zisetshenziswa kabanzi emishinini eshisa kakhulu njengezitofu zokuqhuma kanye nama-converter. Ngaphezu kwalokho, izembozo ze-silicon carbide zinganikeza ukuvikelwa okuhle kakhulu kokuguguleka kanye nokugqwala kwezinto eziyisisekelo, futhi zisetshenziswa emishinini yamakhemikhali, ama-turbine blades nakwezinye izinkambu.