1. Imigaqo yeMveliso kunye neeMpawu zeMicrostructural
1.1 Ubume kunye ne-Crystallographic Character of Al ₂ O EZINHLANU
(Iibhola zeCeramic zeAlumina， Iibhola zeCeramic zeAlumina)
Iibhola ze-alumina ze-ceramic zizinto ezingqukuva ezenziwe nge-aluminiyam oxide enobunzima obukhanyayo (Al ₂ O AMATHANDATHU), i-oxidized ngokupheleleyo, i-polycrystalline ceramic ebonisa ukuqina okumangalisayo, ukungazinzi kweekhemikhali, kunye nokuzinza kwe-thermal.
Inqanaba eliphambili le-crystalline kwiibhola ze-alumina eziphezulu zokusebenza yi-α-alumina, eyamkela isakhelo esivaliweyo sohlobo lwe-corundum-hexagonal apho ubunzima be-aluminum ion buhlala kwisibini esithathwini se-octahedral interstices ngaphakathi kwe-oxygen anion lattice., ukunika amandla aphezulu e-latticework kunye nokuchasana nokulungiswa kweqonga.
Iibhola ze-alumina ze-industrial-grade zibandakanya ngokubanzi 85% ukuya 99.9% Al Zimbini OZINHLANU, ngobunyulu obuchaphazela ngqo amandla omatshini, nxiba ukuxhathisa, kunye nokusebenza kakuhle kokutya.
Iimpawu zokucoceka okuphezulu (≥ 95% Al ₂ O EZINHLANU) zisintered ukuya kufutshane-thiyori ubukhulu (> 99%) usebenzisa amacebo aphucukileyo anje ngoxinzelelo lwe-sintering okanye ukutyhala okushushu kwe-isostatic, ukunciphisa i-porosity kunye neengxaki ze-intergranular ezinokuthi zisebenze njengezigxina zokuxhalabisa.
Isiphumo se-microstructure siquka i-fine, iinkozo ezilinganayo zisasazwe ngokulinganayo kuwo wonke umthamo, ngemilinganiselo yeenkozo ngokubanzi eyahluka ukusuka 1 ukuya 5 iimicrometers, iphuculwe ukuzinzisa ukuqina kunye nokuqina.
1.2 Iprofayile yoomatshini kunye nePropati yoMzimba
Imijikelo ye-alumina ceramic idume ngokuqina kwayo– yagqitywa malunga ne-1800– 2000 HV kwisikali seVickers– ukodlula uninzi lweentsimbi kunye nokukhuphisana netungsten carbide, izenza zilungele indawo ezinxilisayo.
Ukuqina kwabo okuphezulu (ixhomekeke ku 2500 MPa) iqinisekisa ukhuseleko olulinganayo phantsi komthwalo, ngelixa ukunciphisa ukuguquguquka okuguquguqukayo kukhulisa ukuchaneka ekuqengqeni nasekusileni izicelo.
Phezu kwako nje ukonakala kwawo xa kuthelekiswa neentsimbi, Imijikelo ye-alumina ibonisa ukomelela kokwaphuka okungaqhelekanga kwiiseramikhi, ngakumbi xa ukukhula okuziinkozo kulawulwa ngexesha lonke lokugalela.
Bagcina ukunyaniseka kwesakhiwo kulo lonke uluhlu lweqondo lobushushu elikhulu, ukusuka iingxaki cryogenic kangangoko 1600 ° C kwi-ambiences ene-oxidizing, igqithise kakhulu imida yobushushu yepolymer okanye intsimbi elinganayo.
Ngaphaya koko, i-coefficient yokwandisa i-thermal ephantsi (~ 8 × 10 ⁻⁶/ K) kunciphisa ukuba sesichengeni kukothuka kwe-thermal, ivumela ukusetyenziswa kwiindawo ezitshintsha ngokukhawuleza ezishushu ezifana neekhilni kunye nokutshintsha ubushushu.
2. Iinkqubo zokuVelisa kunye noLawulo loMgangatho
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2.1 UbuChwephesha bokuCwangcisa kunye neeNdlela zokuSebenza
Ukuveliswa kwee-alumina ceramic spheres kuqala nge-high-purity alumina powder, ngokuqhelekileyo ivela kwi-bauxite epholileyo okanye i-hydrates ehlaselwe yikhemikhali, ehluzwayo ukufezekisa i-submicron bit dimension kunye ne-slim dimension distribution.
Iipowders emva kokuba zidalwe zibe yimizimba engqukuva-friendly bume kusetyenziswa iindlela ezifana extrusion-spheronization, ukutshiza ukomisa, okanye ingqukuva ephuhlayo kwiipani ezijikayo, ukuxhomekeka kubungakanani obufunwayo kunye noluhlu lokuseta.
Emva kokubunjwa, i-eco-friendly spheres ithatha i-binder edinwa inqanaba elandelwa kubushushu obuphezulu be-sintering, ngokwesiqhelo phakathi 1500 ° C kunye 1700 °C, apho iinkqubo zokusasaza ziqhuba ukuxinana kunye nokurhabula kweenkozo.
Ulawulo oluthe ngqo lokusingqongileyo kwe-sintering (umoya okanye ioksijini elawulwayo yoxinzelelo), ixabiso lokufudumeza ikhaya, kwaye ixesha lokuhlala libalulekile ekufezekiseni ukuncipha okufanayo, ijometri engqukuva, kunye neziphene zangaphakathi.
Kwizicelo ezisebenza kakhulu, I-post-sintering therapy ezifana ne-isostatic pushing eshushu (I-HIP) inokubekwa ukuphelisa i-microporosity eshiyekileyo kwaye iphucule ngakumbi ukuthembeka koomatshini.
2.2 UkuChaneka kokuQeda kunye noQinisekiso lweMetroloji
Ukubambelela kwi-sintering, Imijikelo ye-alumina iphantsi kwaye ikhazimliswe kusetyenziswa imidiya efakwe idayimani ukufezekisa ukuchasana okuqinileyo kunye nokwaleka kwendawo engaphezulu ngokuthelekiswa neebhola zentsimbi ezithwele ibakala..
Uburhabaxa bommandla womphezulu bukholisa ukuncipha ukuya kutsho ngaphantsi kakhulu kunoko 0.05 mna Ra, ukunciphisa ukungqubana kunye nokunxiba kwiimeko zokufowuna eziphilileyo.
Iikhrayitheriya zomgangatho ophezulu obalulekileyo ziquka ukungqukuva (Ukungahambelani ukusuka kwi-satiation ebalaseleyo), ukwahluka kwedayamitha, ukuzinza komphezulu, kunye nobunzima obufanayo, nganye kuzo izimisele ukusebenzisa i-optical interferometry, ukulungelelanisa izixhobo zokusebenza (CMM), kunye ne-laser profilometry.
Imigangatho yamazwe ngamazwe efana ne-ISO 3290 kunye ne-ANSI/ABMA ichaza amanqanaba okumelana kwiinkalo ze-ceramic ezisetyenziswa kwiibheringi, Ukuqinisekisa ukutshintshiselana kunye nokusebenza ngokufanayo kubo bonke ababoneleli.
Iindlela zokuvavanya ezingonakalisi ezifana novavanyo lwe-ultrasonic okanye i-X-ray microtomography zisetyenziselwa ukufumanisa iintanda zangaphakathi., izikhewu, okanye ezongezelelo ezinokubeka esichengeni ukuthembeka okuhlala kuhleli.
3. Izinto eziluncedo ezisebenzayo ngaphezu kweMetallic kunye nePolymer Counterparts
3.1 Ukunyangwa kweMichiza kunye nomhlwa kwiNdawo eziBungqwabalala
Enye yezona zinto ziluncedo kakhulu kwiibhola ze-alumina ceramic kukumelana kwazo okuphezulu nohlaselo lwekhemikhali.
Baqhubeka bengenzi nto kubukho beeasidi eziqinileyo (ngaphandle kwe-hydrofluoric acid), i-antacid, izinyibilikisi eziphilayo, kunye nokukhethwa kwe-saline, ukwenza ukuba zilungele ukusetyenziswa ekuphatheni imichiza, ukwenziwa kwamayeza, kunye nezicelo zaselwandle apho amacandelo ensimbi ngokuqinisekileyo aya kugqwala ngokukhawuleza.
Oku kungasebenzi kuthintela ukungcoliseka kweendaba ezibuthathaka, inkalo ebalulekileyo ekulungisweni kokutya, ukwenziwa kwe-semiconductor, kunye nezixhobo ze-biomedical.
Ngokungafaniyo neentsimbi zentsimbi, I-alumina ayidali i-corrosion okanye i-ion zetsimbi, ukuqinisekisa ubunyulu benkqubo kunye nokuthoba ukugcinwa rhoqo.
Ubume babo obungeyo-magnetic busebenza ngcono kwizixhobo ezihambelana ne-MRI kunye nemigca yokudityaniswa kwedijithali apho uphazamiseko lwemagnethi kufuneka lugcinwe lucacile..
3.2 Sebenzisa ukuchasana kunye nobomi obude benkonzo
Kwimimiselo enqabileyo okanye ephezulu, I-alumina ye-ceramic spheres ibonisa imilinganiselo yokunxiba iodolo yobukhulu obungaphantsi kwentsimbi okanye ukhetho lwepolymer.
Oku komelela okumangalisayo kuguqula kanye kube ngamakhefu esisombululo esandisiweyo, ukunciphisa ixesha lokuphumla, kunye nexabiso eliphantsi lilonke lempahla nokuba amaxabiso okuthenga aphezulu aphezulu.
Zisetyenziswa ngokubanzi njengezixhobo zokusila kwiindawo zokusila ezingqukuva zokusasazwa kwepigment, ukulungiswa kwezimbiwa, kunye ne-nanomaterial synthesis, apho ukungasebenzi kwabo kunqanda ukungcoliseka kunye nokuqina kwabo kuqinisekisa ukucutha ubungakanani bamasuntswana asebenzayo.
Kwizitywina zoomatshini kunye neenxalenye zevalvu, Imijikelo ye-alumina igcina ukunyamezelana okulinganiselweyo kwimijikelo engenakubalwa, Ukuma ukuqhekeka kulwelo olunesuntswana.
4. UShishino kunye nezicelo ezivelayo
4.1 Iibheringi, Ukuvalwa, kunye neeNkqubo zokuPhathwa koLulwelo
Iingqukuva ze-alumina ze-ceramic zibalulekile kwiibheringi zeengqukuva ezixutyiweyo, apho zidityaniswe nentsimbi okanye umdyarho we-silicon nitride ukubandakanya ukuxinana okuphantsi kunye nokumelana nomhlwa kweeseramikhi kunye nokuqina kwesinyithi..
Ubukhulu babo obuphantsi (~ 3.9 g/cm ISIBINI, malunga 40% Ikhaphukhaphu kunentsimbi) yehlisa ukulayishwa kwe-centrifugal kwizantya eziphezulu zokujikeleza, ivumela ukusebenza okukhawulezileyo kunye nokunciphisa ukufudumala kwemveliso kunye nokwandisa amandla okusebenza.
Iibheringi ezinjalo zisetyenziswa kwiispindles ezinesantya esiphezulu, izixhobo zamazinyo, kunye neenkqubo ze-aerospace apho ukuthembeka phantsi kweemeko ezinzima kubalulekile.
Kwizicelo zokulawula ulwelo, iibhola ze-alumina zisebenza njengezinto zokujonga ukuvala kwiimpompo kunye nezixhobo zokulinganisa, ngokukodwa kwiikhemikhali ezinobundlobongela, amanzi acocekileyo, okanye iinkqubo vacuum eziphezulu kakhulu.
Umphezulu wabo ogudileyo kunye nokhuseleko olulinganayo luqinisekisa ukhuseleko oluphinda-phindayo kunye nokuchasana nokugaba okanye ukuthatha.
4.2 I-Biomedical, Amandla, kunye nokuSetyenziswa kweTekhnoloji yale mihla ekwinqanaba eliphezulu
Iindima zoshishino zangaphambili, Imijikelo ye-alumina ceramic ifumana ukusetyenziswa kokufakelwa kwe-biomedical kunye nezixhobo zokuhlalutya ngenxa ye-biocompatibility kunye ne-radiolucency..
Zisetyenziswa kumalungu enziwe ngumntu kunye neprosthetics yamazinyo apho amasuntswana okunxiba kufuneka ehliswe ukunqanda ukudumba kweempendulo..
Kwiinkqubo zamandla, zisebenza njengeetrayisi ze-inert ekubonakalisweni kwetanki yokugcina okanye njengezinto ezizinzile zobushushu kumandla elanga agxininisiweyo kunye neendibano zeeseli zegesi..
Uphononongo lophando lukwajonga iibhola ze-alumina ezisebenzayo zokuxhasa inkxaso, amacandelo eyunithi yokuva, kunye neendlela ezichanekileyo zokulinganisa ububanzi.
Isishwankathelo, iibhola ze-alumina ceramic zibonisa indlela iiseramics ezintsha ezinxibelelanisa ngayo umsantsa phakathi kokuqina kolwakhiwo kunye nokuchaneka okusebenzayo..
Umxube wabo wokuqina wokuqina, ukungazinzi kweekhemikhali, ukhuseleko thermal, kunye nokuchaneka komda kuzenza zibe yimfuneko kwiinkqubo zobunjineli ezithandwayo kuwo wonke amacandelo ahlukeneyo.
Njengoko ubuchule bokuvelisa buhlala buphucuka, ukusebenza kwawo kunye nomgangatho wosetyenziso kulindeleke ukuba kwandiswe ngcono kwisizukulwana esilandelayo setekhnoloji yanamhlanje.
5. Umboneleli
Advanced Ceramics yasekwa ngo-Oktobha 17, 2012, lishishini lobugcisa obuphezulu elizinikele kuphando nophuhliso, imveliso, ukuqhubekeka, ukuthengisa kunye neenkonzo zobugcisa bezixhobo ze-ceramic ezinxulumene ne-Alumina Ceramic Balls. Iimveliso zethu ziquka kodwa aziphelelanga kwiiMveliso zeCeramic zeBoron Carbide, IiMveliso zeCeramic zeBoron Nitride, Iimveliso zeCeramic zeSilicon Carbide, Iimveliso zeCeramic zeSilicon Nitride, IZirconium Dioxide yeeMveliso zeCeramic, njl. Ukuba unomdla, nceda uzive ukhululekile ukuqhagamshelana nathi.([email protected])
Iithegi: iibhola zealumina,iibhola zealumina,iibhola ze-alumina ceramic
Onke amanqaku kunye nemifanekiso avela kwi-Intanethi. Ukuba kukho nayiphi na imiba ye-copyright, nceda uqhagamshelane nathi ngexesha lokucima.
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