I-alumina ceramic engagugiyosisixhobo sodongwe esiphucukileyo semizi-mveliso esenziwe ikakhulu yi-alumina ecocekileyo kakhulu (Al₂O₃). Siye saba sisixhobo esibalulekileyo sokujongana nokuguguleka okukhulu, ukugqwala, kunye neemeko zobushushu obuphezulu ngenxa yobunzima bayo obungaqhelekanga, ukumelana nokuguguleka, kunye nozinzo lweekhemikhali. Xa kuthelekiswa nezixhobo zemveli ezimelana nokuguguleka zesinyithi, sandisa kakhulu ubomi benkonzo yezixhobo kwaye sinciphisa amaxesha okugcinwa kunye neendleko kumacandelo amaninzi emizi-mveliso, sisebenza njengesisombululo esibalulekileyo kumashishini aqala kumandla kunye nesinyithi ukuya kwimveliso ephezulu.
Ukusebenza kwayo okugqwesileyo kusekelwe kwidatha echanekileyo yezinto ezibonakalayo nezekhemikhali. Ubunzima beRockwell (HRA) be-alumina ceramic bunokufikelela kwi-80-90, kunye namandla oxinzelelo angaphezulu kwe-850 MPa. Uvavanyo lobuchwephesha lubonisa ukuba ukumelana kwayo nokuguguleka kuphindwe ka-266 kunentsimbi ye-manganese kunye ne-171.5 ngokuphindwe ka-171.5 kunentsimbi ephezulu ye-chromium. Ngokuphathelele ukumelana nobushushu, ubushushu bayo benkonzo yexesha elide bunokufikelela kwi-300°C, kwaye inokumelana nokuguguleka kwe-acid kunye ne-alkali ngaphakathi koluhlu lwe-pH oluphakathi kwe-3 ukuya kwi-12. Ezi mpawu ziyenza isebenze ngokuzinzileyo kwiindawo ezinefuthe eliphezulu, ukuguguleka okuphezulu, kunye nokuguguleka, umzekelo, ukwandisa ubomi benkonzo yemibhobho ehambisa umgubo wamalahle ngaphezulu kwamaxesha ali-10.
Ukusebenza kwe-alumina ceramic engagugiyo kuzuza kulawulo oluchanekileyo lwenkqubo yonke ukusuka kwizinto eziluhlaza ukuya ekutshiseni. Okokuqala, umgubo we-alumina oluhlaza ugrunjwa kakuhle, ubukhulu bamasuntswana buhlala bulawulwa ngaphantsi kwe-1 micron, kuqinisekiswa ubunyulu obuphezulu kunye nokusasazwa kobukhulu bamasuntswana ngokulinganayo. Iinkqubo zokuqala zokwenza ziquka ukucinezela okomileyo kunye nokucinezela kwe-isostatic, oku kokugqibela kunika uxinano olufana ngakumbi kumzimba oluhlaza. Okokugqibela, umzimba oluhlaza utshiswe malunga ne-1700°C, okwenza isakhiwo esixineneyo se-microcrystalline, kunye noxinano lwezinto olufikelela ngaphezulu kwe-95%. Iifomyula ezidityanisiweyo, ezifana nokongeza i-zirconia (ZrO₂), zinokuphucula ngakumbi ukumelana kwayo nempembelelo kunye nokuqina.
Le nto isetyenziswa kakhulu kumacandelo amaninzi emizi-mveliso. Kumashishini okukhusela amandla nokusingqongileyo, isetyenziswa kwimibhobho yomgubo wamalahle kwizityalo zamandla obushushu, nakwiindawo zokwahlulahlula kunye neekhowuni zesamente, nto leyo eyandisa ubomi benkonzo yezixhobo ngokuphindwe kathathu ukuya kahlanu. Kumashishini esinyithi kunye nemigodi, ii-ceramic liners ezifakwe kwimibhobho yokufakwa kwamalahle kwi-blast furnace kunye nemibhobho yokususa uthuli ngokufanelekileyo zimelana ngokufanelekileyo ne-abrasive media efana nomgubo we-iron ore, nto leyo enciphisa iindleko zokugcinwa konyaka ukuya kuthi ga kwi-60%. Ngaphezu koko, ubumsulwa obuphezulu kakhulu (umz., 99.7%) ii-alumina ceramics zikwasetyenziswa kumacandelo okuvelisa aphezulu afana ne-semiconductor wafer polishing.
Ixesha leposi: Disemba-19-2025