Yiziphi izici zokushisa zesithando se-muffle?

Izakhi zokushisa zesithando somlilo se-muffle zihlanganisa izintambo zikagesi zesithando somlilo, izinduku ze-silicon carbide, nezinduku ze-silicon molybdenum.

Intambo yesitofu sikagesi:

Intambo yesithando somlilo kagesi yenziwe nge-iron-chromium-aluminium kanye nezintambo zikagesi ze-nickel-chromium zokufudumeza kagesi. Amandla ocingo lwesithando somlilo alawulwa yi-computer, futhi alinyazwa umshini ozishintshayo ozishintshayo onesivinini esikhulu. Ihlanganisa ikakhulukazi izintambo zikagesi ze-iron-chromium-aluminium alloy kanye nezintambo zikagesi ze-nickel-chromium alloy. Eyokuqala i-alloy material enesakhiwo se-ferrite, kanti lesi sakamuva siyinto ye-alloy enesakhiwo se-austenite. Kokubili intambo yesithando somlilo ye-chromium-aluminium alloy kanye ne-nickel-chromium alloy electric furnace wire inendawo yokuncibilika engaphansi kuka-1400℃, futhi ngokuvamile isezingeni eliphezulu kakhulu lokushisa (isimo esishisayo) ngaphansi kwezimo zokusebenza, futhi ijwayele ukusabela nge-oxidation. emoyeni futhi ashise Ukubi.

I-silicon carbide rod:

Izinti ze-silicon carbide ziyizinto zokushisa zikagesi ezimise okwenduku futhi ziyi-tubular ezingezona ezensimbi ezinezinga eliphezulu lokushisa ezenziwe nge-high-purity green hexagonal silicon carbide njengento eluhlaza eyinhloko. Emkhathini we-oxidizing, izinga lokushisa elijwayelekile lokusetshenziswa lingafinyelela ku-1450 ℃, futhi ukusetshenziswa okuqhubekayo kungafinyelela amahora angu-2000. Izinduku ze-silicon carbide ziqinile futhi ziyashwabana, zimelana nokubanda okusheshayo nokushisa okusheshayo, azikhubazeki kalula emazingeni okushisa aphezulu, futhi zisetshenziswa emazingeni okushisa aphezulu. Zinezici zokumelana nokushisa okuphezulu, ukumelana ne-oxidation, ukumelana nokugqwala, ukukhuphuka kwezinga lokushisa okusheshayo, impilo ende, ukuwohloka okuncane kwezinga lokushisa eliphezulu, ukufakwa nokugcinwa okulula, njll., futhi zinokuqina okuhle kwe-Chemical.

Kodwa-ke, i-silicon carbide rod element ingaba nemiphumela elandelayo ngomoya-mpilo nomhwamuko wamanzi lapho isetshenziswa isikhathi eside ngaphezu kuka-1000 ℃:

①Sic+2O2→Sio2+CO2 ②Sic+4H2O=Sio2+4H2+CO2

Ngenxa yalokho, okuqukethwe kwe-SiO2 ku-elementi kuyanda kancane kancane, futhi ukumelana kukhula kancane, okuwukuguga. Uma umhwamuko wamanzi umuningi kakhulu, uzothuthukisa i-oxidation ye-SiC. I-H2 ekhiqizwa ukusabela kwefomula ② ihlangana ne-O2 emoyeni bese isabela ne-H2O ukuze kwakhe umbuthano ononya. Yehlisa impilo yengxenye. IHydrojeni (H2) inganciphisa amandla omshini wengxenye. I-Nitrogen (N2) engaphansi kuka-1200°C ingavimbela i-SiC ekubeni i-oxidizing futhi isabele nge-SiC ngaphezu kuka-1350°C, ukuze i-SiC ibole nge-chlorine (Cl2) kanye ne-Sic ikwazi ukubola ngokuphelele.

I-silicon molybdenum induku:

Izinduku ze-silicon molybdenum ngokuvamile zingasetshenziswa ekushiseni komlilo okungu-1600°C-1750°C. Zisetshenziswa kabanzi ku-metallurgy, ingilazi, i-ceramics, izinto kazibuthe, izinto eziphikisayo, amakristalu, izakhi ze-elekthronikhi, ukukhiqizwa kwesithando somlilo neminye imikhakha. Asetshenziselwa ukucwilisa izinga lokushisa eliphezulu kwemikhiqizo* Into efanelekile yokushisisa.

I-silicon molybdenum rod ivezwa kumoya we-oxidizing wezinga eliphezulu lokushisa, futhi ungqimba oluvikelayo lwe-quartz lwenziwa phezulu ukuze kuvinjwe induku ye-silicon molybdenum ukuthi ingaqhubeki ne-oxidize. Uma izinga lokushisa lengxenye lingaphezu kuka-1700 ° C, ungqimba oluvikelayo lwe-quartz luyancibilika, futhi ingxenye iyaqhubeka isetshenziswa emkhathini we-oxidizing, futhi isendlalelo sokuvikela se-quartz siyavuselelwa. Izinduku ze-silicon molybdenum akufanele zisetshenziswe isikhathi eside ebangeni lika-400-700 ℃, ngaphandle kwalokho izingxenye zizoba yimpuphu ngenxa ye-oxidation eqinile ekushiseni okuphansi.