Ngenxa yeempawu zayo ezintle zomzimba, i-silicon carbide e-reaction-sintered isetyenziswa kakhulu njengezinto eziphambili zekhemikhali. Ububanzi bokusetyenziswa kwayo bunemiba emithathu: ukuvelisa izinto ezirhabaxa; Isetyenziselwa ukuvelisa izinto zokufudumeza ezichaseneyo — intonga ye-silicon molybdenum, ityhubhu ye-silicon carbon, njl.njl.; Ukwenza iimveliso ezichaseneyo. Njengezinto ezikhethekileyo ezichaseneyo, isetyenziswa ekunyibilikiseni isinyithi nentsimbi njengesithando somlilo sesinyithi, i-cupola kunye nokunye ukucutshungulwa kwesitampu, ukugqwala, umonakalo kwindawo eqinileyo yeemveliso ezingatshiyo; Kwizinto ezinqabileyo zesinyithi (i-zinc, i-aluminium, i-copper) zokunyibilikisa isithando somlilo, umbhobho wokuhambisa isinyithi onyibilikisiweyo, isixhobo sokucoca, imbiza ye-clamp, njl.njl.; Kunye netekhnoloji yesithuba njenge-nozzle yomsila wenjini yokunyathela, i-blade ye-turbine yegesi yendalo eqhubekayo; Kwishishini le-silicate, kukho iintlobo ngeentlobo zeshedi ye-oyile yoshishino, itshaja yesithando somlilo sohlobo lwebhokisi, i-saggar; Kwishishini leekhemikhali, isetyenziswa njengokuvelisa igesi, i-carburetor yeoyile eluhlaza, isithando somlilo segesi esinyibilikisiweyo kunye nokunye.
Ukusetyenziswa ngokucocekileyo kweemveliso zokuvelisa i-α-SiC, ngenxa yamandla ayo amakhulu, kunzima kakhulu ukuyigaya ibe yi-nanoscale ultrafine powder, kwaye la masuntswana ziiplates okanye iifayibha, ezisetyenziselwa ukugaya kwi-compact, nokuba kushushu ukuya kubushushu bayo bokubola, aziyi kuvelisa ukugoba okucacileyo, azinakutshiswa, inqanaba loxinano lweemveliso liphantsi, kwaye ukumelana ne-oxidation akukuhle. Ke ngoko, kwimveliso yemizi-mveliso, inani elincinci le-particle matter spherical β-SiC ultrafine powder longezwa kwi-α-SiC kunye nokukhethwa kwezongezo ukuze kufunyanwe iimveliso ezinoxinano oluphezulu. Njengesongezo sokubopha imveliso, ngokwehlobo lungahlulwahlulwa lube zii-metal oxides, ii-nitrogen compounds, i-high purity graphite, ezifana nodongwe, i-aluminium oxide, i-zircon, i-zirconium corundum, i-lime powder, i-laminated glass, i-silicon nitride, i-silicon oxynitride, i-high purity graphite njalo njalo. Isisombululo samanzi se-adhesive esibumbayo sinokuba yi-hydroxymethylcellulose enye okanye ngaphezulu, i-acrylic emulsion, i-lignocellulose, i-tapioca starch, isisombululo se-aluminium oxide colloidal, isisombululo se-silicon dioxide colloidal, njl. Ngokweentlobo zezongezo kunye nomahluko kubungakanani bokongeza, ubushushu bokudubula be-compact abufani, kwaye uluhlu lobushushu yi-1400 ~ 2300℃. Umzekelo, i-α-SiC70% enokusasazwa kobukhulu be-particle engaphezulu kwe-44μm, i-β-SiC20% enokusasazwa kobukhulu be-particle ngaphantsi kwe-10μm, udongwe yi-10%, kunye ne-4.5% yesisombululo se-lignocellulosic esingu-8%, sixutywe ngokulinganayo, senziwe ngoxinzelelo olusebenzayo lwe-50MPa, sitshiswa emoyeni kwi-1400℃ kangangeeyure ezi-4, Uxinano olubonakalayo lwemveliso yi-2.53g/cm3, i-porosity ebonakalayo yi-12.3%, kwaye amandla okutsalwa yi-30-33mpa. Iimpawu zokusila zeentlobo ezahlukeneyo zeemveliso ezinezongezo ezahlukeneyo zidweliswe kwiTheyibhile 2.
Ngokubanzi, ii-refractories ze-silicon carbide ezi-reaction-sintered zineempawu ezikumgangatho ophezulu kuzo zonke iinkalo, ezinje ngamandla aqinileyo okucinezelwa, ukumelana okunamandla okutshixwa kobushushu, ukumelana nokuguguleka okuhle, ukuqhuba kobushushu okunamandla kunye nokuxhathisa ukugqwala kwe-solvent kumanqanaba obushushu abanzi. Nangona kunjalo, kufuneka kubonwe ukuba ingxaki yayo kukuba isiphumo se-antioxidant asisihle, nto leyo ebangela ukwanda komthamo kunye nokuguquguquka kwindawo yobushushu obuphezulu ukunciphisa ubomi benkonzo. Ukuze kuqinisekiswe ukumelana nokugqwala kwee-refractories ze-silicon carbide ezi-reaction-sintered, kwenziwe umsebenzi omninzi wokukhetha kumaleko wokubopha. Ukusetyenziswa kwe-clay (equlethe ii-oxides zesinyithi) fusion, kodwa akuzange kubonelele ngesiphumo se-buffer, amasuntswana e-silicon carbide asephantsi kwe-oxidation yomoya kunye nokugqwala.
Ixesha lokuthumela: Juni-21-2023