Iibhloko zeCeramic zeAlumina ezingagugiyo: Zenzelwe uKhuseleko oluGqwesileyo lokuGqobhoka

Iibhloko ze-alumina ceramic ezingagugiyoZenziwe ngokuchanekileyo nge-aluminium oxide ecocekileyo kakhulu (umxholo we-Al₂O₃ ≥ 92–99%) ngokucinezela okomileyo kunye nokusila ngobushushu obuphezulu kwi-1,500–1,700°C. Le nkqubo yokuvelisa iphucukileyo ivelisa izinto zeseramikhi ezinobunzima obungaqhelekanga—ezilinganisa i-9 kwisikali seMohs kunye ne-HRA 80–90 kwisikali seRockwell, ezilandela idayimani kuphela. Ngobuninzi bevolumu obuyi-3.60–3.85 g/cm³, ezi bhloko zinobunzima obumalunga nesiqingatha sentsimbi, zinciphisa kakhulu umthwalo wezixhobo ngelixa zibonelela ngokhuseleko oluphezulu lokuguguleka. Ezi zinto zibonisa ukufunxwa kwamanzi okuphantsi kakhulu ngaphantsi kwe-0.01%, ziqinisekisa ukusebenza okuzinzileyo nakwiindawo ezinomswakama.

Ukumelana okuphezulu kokuguguleka kweebhloko ze-alumina ceramic kuthetha ngokuthe ngqo kubomi benkonzo yexesha elide kunye neendleko zokugcinwa ezincitshisiweyo. Uvavanyo oluzimeleyo lubonisa ukuba ukumelana kwazo nokuguguleka kumalunga nama-260–266 entsimbi ye-manganese kunye nama-170–171.5 ephindwe kwintsimbi ephezulu ye-chromium. Ngamandla oxinzelelo afikelela kwi-≥2,000 MPa kunye namandla okuguquguquka e-255–300 MPa, ezi bhloko zimelana nemithwalo enzima ngaphandle kokuqhekeka. Ukuqina kwazo kokuqhekeka (KIC) kwe-≥4.8 MPa·m¹/² kuqinisekisa ukuqina phantsi kweemeko zoxinzelelo olujikelezayo. Ezi mpawu zokusebenza zenza iibhloko ze-alumina ceramic zibe sisisombululo esifanelekileyo se-lining kwizicelo zokuguguleka okuphezulu ezifana nee-chutes, ii-hoppers, ii-cyclones, kunye neenkqubo zokuphatha izinto.

Ukususela kwimigodi kunye nokucubungula izimbiwa ukuya kwimveliso yesamente, ukwenza intsimbi, ukuvelisa umbane oshushu, kunye nokucubungula iikhemikhali, iibhloko ze-alumina ceramic ezingagugiyo ziye zabonakalisa ixabiso lazo kumashishini apho ukukrazula kwezixhobo kuyinkxalabo ephambili. Ezi bhloko zifumaneka kumanqanaba ococeko lwe-Al₂O₃ angama-92%, 95%, kunye nama-99%, zinokwenziwa ngokwezifiso ukuhlangabezana neemfuno ezithile zesicelo, kunye nobunyulu obuphezulu obubonelela ngokumelana nokukrazula okuphuculweyo. Ngokufaka iibhloko ze-alumina ceramic kwiindawo ezibalulekileyo zokukrazula, abaqhubi bezityalo banokunciphisa kakhulu ixesha lokungasebenzi elingacwangciswanga, banciphise uluhlu lwezinto ezitshintshiweyo, kwaye bafumane iindleko eziphantsi zobunini kumjikelo wobomi bezixhobo.