Njengohlobo lwezinto zobumba, i-zirconium inamandla aphezulu, ubulukhuni obuphezulu, ukumelana nokuguguleka okuhle, ukumelana ne-asidi ne-alkali, ukumelana nokushisa okuphezulu kanye nezinye izakhiwo ezinhle kakhulu. Ngaphezu kokusetshenziswa kabanzi emkhakheni wezimboni, ngentuthuko enamandla yemboni yamazinyo okufakelwa eminyakeni yamuva nje, ama-zirconia ceramics abe yizinto zobumba zokufakelwa ezingaba khona kakhulu futhi adonsele ukunaka kwabacwaningi abaningi.
Indlela yokuhlanza
Indlela yendabuko yokusila iwukushisa umzimba ngokusebenzisa imisebe yokushisa, ukuqhutshwa kokushisa, ukufudumeza, ukuze ukushisa kusuke ebusweni be-zirconia kuye ngaphakathi, kodwa ukuqhutshwa kokushisa kwe-zirconia kubi kakhulu kunokwe-alumina nezinye izinto zobumba. Ukuze kuvinjelwe ukuqhekeka okubangelwa ukucindezeleka kokushisa, ijubane lokushisa lendabuko lihamba kancane futhi isikhathi side, okwenza umjikelezo wokukhiqiza we-zirconia ube mude futhi izindleko zokukhiqiza ziphezulu. Eminyakeni yamuva nje, ukuthuthukisa ubuchwepheshe bokucubungula be-zirconia, ukunciphisa isikhathi sokucubungula, ukunciphisa izindleko zokukhiqiza, kanye nokuhlinzeka ngezinto zobumba ze-zirconia zamazinyo ezisebenza kahle kakhulu kube yinto ebalulekile ocwaningweni, futhi ukusila nge-microwave ngokungangabazeki kuyindlela ethembisayo yokusila.
Kutholakale ukuthi ukushiswa kwe-microwave kanye nokushiswa kwengcindezi yomoya akunawo umehluko omkhulu ethonyeni lokungangeni kahle kwe-semi-permeability kanye nokumelana nokuguguleka. Isizathu ukuthi ubuningi be-zirconia obutholakala ngokushiswa kwe-microwave bufana nobokushiswa okuvamile, futhi kokubili kushiswa okuqinile, kodwa izinzuzo zokushiswa kwe-microwave izinga lokushisa eliphansi lokushiswa, isivinini esisheshayo kanye nesikhathi esifushane sokushiswa. Kodwa-ke, izinga lokushisa lokwenyuka kokushiswa kwengcindezi yomoya lihamba kancane, isikhathi sokushiswa side, kanti isikhathi sonke sokushiswa cishe singamahora angu-6-11. Uma kuqhathaniswa nokushiswa kwengcindezi okuvamile, ukushiswa kwe-microwave kuyindlela entsha yokushiswa, enezinzuzo zesikhathi esifushane sokushiswa, ukusebenza kahle okuphezulu kanye nokonga amandla, futhi ingathuthukisa isakhiwo esincane sezinto zobumba.
Ezinye izazi zikholelwa nokuthi i-zirconia ngemva kokushisa nge-microwave ingagcina isigaba se-tequartet esizinzile kakhulu, mhlawumbe ngoba ukushisa okusheshayo kwe-microwave kungafinyelela ukuqina okusheshayo kwezinto ezisetshenziswayo ekushiseni okuphansi, usayizi wezinhlamvu mncane futhi uyafana kakhulu nowe-pressure sintering evamile, uphansi kunosayizi wokuguqulwa kwesigaba esibucayi se-t-ZrO2, okusiza ukugcina okuningi ngangokunokwenzeka esimweni esizinzile ekushiseni kwegumbi, kuthuthukiswe amandla nokuqina kwezinto zobumba.
Inqubo yokucwilisa kabili
I-zirconia ceramics ezihlanganisiwe ezisikiwe ingacutshungulwa kuphela ngamathuluzi okusika i-emery ngenxa yobunzima namandla aphezulu, futhi izindleko zokucubungula ziphezulu futhi isikhathi side. Ukuze kuxazululwe izinkinga ezingenhla, ngezinye izikhathi i-zirconia ceramics izosetshenziswa kabili inqubo yokusikiwe, ngemva kokwakheka komzimba we-ceramic kanye nokusikiwe kokuqala, umshini wokukhulisa we-CAD/CAM uye esimweni esifunwayo, bese usikiwe uye ekushiseni kokugcina kokusikiwe ukuze wenze izinto zibe nzima ngokuphelele.
Kutholakale ukuthi izinqubo ezimbili zokusinta zizoshintsha i-kinetics yokusinta ye-zirconia ceramics, futhi zizoba nemiphumela ethile ekujuleni kokusinta, izakhiwo zemishini kanye nesakhiwo esincane se-zirconia ceramics. Izakhiwo zemishini ze-zirconia ceramics ezisintayo ezishisiwe uma seziqinile zingcono kunezo ezisintayo kabili. Amandla okugoba kwe-biaxial kanye nokuqina kokuphuka kwe-zirconia ceramics ezisintayo uma sezihlanganisiwe ziphakeme kunezo ezisintayo kabili. Imodi yokuphuka kwe-zirconia ceramics eziyinhloko ezisintayo i-transgranular/intergranular, futhi ukuqhekeka kuqondile. Imodi yokuqhekeka kwe-zirconia ceramics ezisintayo kabili ikakhulukazi i-intergranular fracture, futhi umkhuba wokuqhekeka unzima kakhulu. Izakhiwo zemodi yokuqhekeka ehlanganisiwe zingcono kunemodi yokuqhekeka elula ye-intergranular.
I-vacuum yokuthungula
I-Zirconia kumele ishiswe endaweni engenamanzi, enkambisweni yokushisa izokhiqiza inani elikhulu lamabhamuza, futhi endaweni engenamanzi, amabhamuza kulula ukuwakhipha esimweni esincibilikisiwe somzimba we-porcelain, kuthuthukiswe ubuningi be-zirconia, ngaleyo ndlela kwandiswe ukuvuleka okuncane kanye nezakhiwo zemishini ze-zirconia.
Izinga lokushisa
Enqubweni yokushisisa i-zirconia, ukuze kutholakale ukusebenza okuhle nemiphumela elindelekile, kufanele kusetshenziswe izinga lokushisa eliphansi. Izinga lokushisa eliphezulu lenza izinga lokushisa langaphakathi le-zirconia lingalingani lapho lifinyelela izinga lokushisa lokugcina lokushisisa, okuholela ekubonakaleni kwemifantu kanye nokwakheka kwama-pores. Imiphumela ikhombisa ukuthi ngokwanda kwesilinganiso sokushisa, isikhathi sokukristalisa samakristalu e-zirconia siyafinyezwa, igesi phakathi kwamakristalu ayikwazi ukukhishwa, futhi ama-porosity ngaphakathi kwamakristalu e-zirconia ayanda kancane. Ngokukhula kwesilinganiso sokushisa, inani elincane lesigaba sekristalu se-monoclinic liqala ukuba khona esigabeni se-tetragonal se-zirconia, okuzothinta izakhiwo zemishini. Ngesikhathi esifanayo, ngokwanda kwesilinganiso sokushisa, amagremu azohlukaniswa, okungukuthi, ukuba khona ndawonye kwamagremu amakhulu namancane kulula. Izinga lokushisa elihamba kancane lisiza ekwakhekeni kwamagremu afanayo, okwandisa ukugeleza kwe-zirconia.
Isikhathi sokuthunyelwe: Agasti-15-2023