Ngenxa yezakhiwo zayo ezinhle zomzimba, i-silicon carbide e-reaction-sintered isetshenziswe kabanzi njengezinto zokusetshenziswa zamakhemikhali ezinkulu. Ububanzi bokusetshenziswa kwayo bunezici ezintathu: ukukhiqizwa kwezinto ezisusayo; Isetshenziselwa ukukhiqiza izingxenye zokushisa zokumelana — induku ye-silicon molybdenum, i-silicon carbon tube, njll.; Ukwenziwa kwemikhiqizo ephikisayo. Njengezinto ezikhethekile eziphikisayo, isetshenziswa ekuncibilikiseni insimbi nensimbi njengesithando somlilo sensimbi, i-cupola nokunye ukucubungula okunyathelisayo, ukugqwala, ukulimala kwesikhundla esinamandla semikhiqizo engashi; Ezintweni ezincibilikisa insimbi ezingavamile (i-zinc, i-aluminium, ithusi) zokushaja isithando somlilo esincibilikayo, ipayipi lokuhambisa insimbi elincibilikisiwe, idivayisi yokuhlunga, ibhodwe elibambayo, njll.; kanye nobuchwepheshe besikhala njenge-nozzle yomsila wenjini yokunyathela, i-blade ye-turbine yegesi yemvelo eqhubekayo eshisayo; Embonini ye-silicate, kunezinhlobo eziningi zeshede lesitofu sezimboni, ishaja yesithando somlilo sohlobo lwebhokisi, i-saggar; Embonini yamakhemikhali, isetshenziswa njengokukhiqiza igesi, i-carburetor kawoyela ongahluziwe, isithando somlilo segesi esiphumayo nokunye.
Ukusetshenziswa okumsulwa kwemikhiqizo yokukhiqiza i-α-SiC, ngenxa yamandla ayo amakhulu, kunzima kakhulu ukuyigaya ibe yimpuphu ecolekile kakhulu, futhi izinhlayiya zingamapuleti noma imicu, esetshenziselwa ukugaya ibe yi-compact, ngisho nasekufudumaleni kuze kufike ekushiseni kwayo okubolayo nxazonke, ngeke kukhiqize ukugoqwa okusobala kakhulu, akunakushiswa, izinga lokuqina kwemikhiqizo liphansi, futhi ukumelana nokubola akukuhle. Ngakho-ke, ekukhiqizweni kwemikhiqizo yezimboni, inani elincane lempuphu ye-β-SiC eyindilinga ye-ultrafine liyangezwa ku-α-SiC kanye nokukhethwa kwezithasiselo ukuthola imikhiqizo enobuningi obukhulu. Njengesengezo sokubopha umkhiqizo, ngokohlobo lungahlukaniswa ngama-oxide ensimbi, ama-compound e-nitrogen, i-graphite emsulwa kakhulu, njengobumba, i-aluminium oxide, i-zircon, i-zirconium corundum, i-lime powder, ingilazi elaminethiwe, i-silicon nitride, i-silicon oxynitride, i-graphite emsulwa kakhulu njalo njalo. Isixazululo samanzi se-adhesive esibumbayo singaba yi-hydroxymethylcellulose eyodwa noma ngaphezulu, i-acrylic emulsion, i-lignocellulose, isitashi se-tapioca, isixazululo se-aluminium oxide colloidal, isixazululo se-silicon dioxide colloidal, njll. Ngokusho kohlobo lwezithasiselo kanye nomehluko enanini lokwengeza, izinga lokushisa lokudubula le-compact alifani, futhi ububanzi bokushisa bungu-1400~2300℃. Isibonelo, i-α-SiC70% enokusatshalaliswa kosayizi wezinhlayiyana ezingaphezu kuka-44μm, i-β-SiC20% enokusatshalaliswa kosayizi wezinhlayiyana okungaphansi kuka-10μm, ubumba 10%, kanye nesixazululo se-lignocellulosic esingu-4.5% esingu-8%, esixutshwe ngokulinganayo, esakhiwe ngengcindezi yokusebenza engu-50MPa, esidutshulwe emoyeni ku-1400℃ amahora angu-4, Ubuningi obubonakalayo bomkhiqizo bungu-2.53g/cm3, i-porosity ebonakalayo ingu-12.3%, kanti amandla okudonsa angama-30-33mpa. Izakhiwo zokusila zezinhlobo eziningana zemikhiqizo enezithasiselo ezahlukene zibhalwe kuThebula 2.
Ngokuvamile, ama-refractories e-silicon carbide angena-reaction-sintered anezakhiwo zekhwalithi ephezulu kuzo zonke izici, njengamandla aqinile okucindezela, ukumelana okunamandla kokushaqeka kokushisa, ukumelana okuhle kokuguguleka, ukuhanjiswa okuqinile kokushisa kanye nokumelana nokugqwala kwe-solvent ebangeni elibanzi lokushisa. Kodwa-ke, kufanele futhi kubonakale ukuthi ukungathandeki kwawo ukuthi umphumela we-antioxidant awulungile, okubangela ukwanda kwevolumu kanye nokuguquguquka endaweni yokushisa ephezulu ukunciphisa impilo yesevisi. Ukuze kuqinisekiswe ukumelana nokugqwala kwama-refractories e-silicon carbide angena-reaction-sintered, kwenziwe umsebenzi omningi wokukhetha kungqimba lokubopha. Ukusetshenziswa kobumba (oluqukethe ama-oxide ensimbi) fusion, kodwa akuzange kunikeze umphumela we-buffer, izinhlayiya ze-silicon carbide zisabhekene nokugqwala komoya.
Isikhathi sokuthunyelwe: Juni-21-2023