Ngenxa yeepropathi zayo ezilungileyo zomzimba, i-react-sintered silicon carbide isetyenziswe ngokubanzi njengeyona nto iphambili yeekhemikhali ekrwada. Umda wayo wesicelo unemiba emithathu: ukuveliswa kwee-abrasives; Isetyenziselwa ukuvelisa amacandelo okufudumeza okuxhathisayo - intonga ye-silicon molybdenum, i-silicon carbon tube, njl.; Ukwenziwa kweemveliso eziphikisayo. Njengesixhobo esikhethekileyo esichasayo, sisetyenziselwa ukunyibilika kwesinyithi kunye nentsimbi njengesithando somlilo sentsimbi, i-cupola kunye nezinye i-stamping processing, i-corrosion, umonakalo kwindawo eqinile yeemveliso ezingenamlilo; Kwisinyithi esinqabileyo (i-zinc, i-aluminiyam, ubhedu) izinyibilikisi zokunyibilikisa intlawulo yesithando somlilo, umbhobho wokuhambisa isinyithi esinyibilikisiweyo, isixhobo sokucoca, imbiza yokubamba, njl.; Kwaye ubuchwephesha basemajukujukwini njengomlomo we-injini yokunyathela umsila, incakuba eqhubekayo yobushushu obuphezulu begesi yendalo; Kwishishini le-silicate, ezininzi njengeendidi ezahlukeneyo zeshedi ye-industrial kiln, uhlobo lwebhokisi yokuchasa isithando somlilo, i-saggar; Kwishishini lemichiza, lisetyenziswa njengesizukulwana segesi, i-carburetor yeoli ekrwada, i-flue gas desulfurization furnace njalo njalo.
Ukusetyenziswa okucocekileyo kwemveliso yokuvelisa i-α-SiC, ngenxa yamandla ayo amakhulu, kunzima kakhulu ukuyigaya kwi-nanoscale powder ultrafined, kwaye amaqhekeza amacwecwe okanye iifayibha, ezisetyenziselwa ukugaya kwi-compact, nakwi-heater to decomposition. iqondo lobushushu elijikelezayo, aliyi kuvelisa ukusongwa okucacileyo kakhulu, akunakwenziwa sintered, umgangatho woxinaniso lweemveliso uphantsi, kunye nokumelana ne-oxidation kubi. Ngoko ke, kwimveliso yemveliso yeemveliso, inani elincinci le-particulate spherical β-SiC ultrafine powder yongezwa kwi-α-SiC kunye nokukhethwa kwezongezo zokufumana iimveliso eziphezulu. Njengesihlomelo sokudibanisa imveliso, ngokohlobo lunokwahlulwa lube yi-oxides yesinyithi, i-nitrogen compounds, i-graphite ephezulu yokucoceka, njengodongwe, i-aluminium oxide, i-zircon, i-zirconium corundum, i-lime powder, iglasi elaminethiweyo, i-silicon nitride, i-silicon oxynitride, ephakamileyo. ubunyulu begraphite njalo njalo. Isisombululo samanzi sokwenza i-adhesive ingaba yinye okanye ngaphezulu kwe-hydroxymethylcellulose, i-acrylic emulsion, i-lignocellulose, i-tapioca starch, i-aluminium oxide colloidal isisombululo, isisombululo se-silicon dioxide colloidal, njl ukushisa kokudubula kwe-compact akufani, kunye noluhlu lweqondo lokushisa yi-1400 ~ 2300 ℃. Ngokomzekelo, i-α-SiC70% kunye nokusabalalisa ubungakanani besuntswana ngaphezu kwe-44μm, i-β-SiC20% kunye nokusabalalisa ubungakanani besuntswana elingaphantsi kwe-10μm, udongwe 10%, kunye ne-4.5% isisombululo se-lignocellulosic 8%, ixutywe ngokulinganayo, yenziwe nge-50MPa esebenzayo. uxinzelelo, lugxothwe emoyeni kwi-1400 ℃ ye-4h, Ubuninzi obubonakalayo bemveliso I-2.53g / cm3, i-porosity ebonakalayo yi-12.3%, kwaye amandla e-tensile yi-30-33mpa. Iimpawu ze-sintering zeentlobo ezininzi zeemveliso ezinezongezo ezahlukeneyo zidweliswe kwiThebhile 2.
Ngokubanzi, i-refractories ye-silicon carbide refractories yokusabela-sintered ineempawu ezikumgangatho ophezulu kuzo zonke iinkalo, ezinje ngokuqina koxinzelelo oluqinileyo, ukuxhathisa ukothuka kwe-thermal, ukumelana nokunxiba okufanelekileyo, ukuguquguquka okuqinileyo kwe-thermal kunye nokumelana ne-solvent corrosion kuluhlu olubanzi lobushushu. Nangona kunjalo, kufuneka kubonwe ukuba i-disadvantage kukuba i-antioxidant effect ihlwempuzekile, ebangela ukwanda kwevolumu kunye nokuguqulwa kwimeko yokushisa okuphezulu ukunciphisa ubomi benkonzo. Ukuze kuqinisekiswe ukuxhathisa kwe-oxidation ye-refractories ye-silicon carbide yokuphendula, umsebenzi omninzi wokukhetha wenziwe kumaleko okudibanisa. Ukusetyenziswa kodongwe (oluqulethe i-oxides yensimbi) fusion, kodwa aluzange lunikeze umphumo we-buffer, iinqununu ze-silicon carbide zisaxhomekeke kwi-oxidation yomoya kunye ne-corrosion.
Ixesha lokuposa: Jun-21-2023