Niba imyanda ya electroceramics isukuye ishobora gukoreshwa muguhuza ceramics mullite？

Imyanda imwe n'imwe yerekana inganda ifite akamaro mukubyaza umusaruro wa mullite.Iyi myanda yo mu nganda ikungahaye kuri oxyde zimwe na zimwe nka silika (SiO2) na alumina (Al2O3).Ibi bitanga imyanda ubushobozi bwo gukoreshwa nkintangiriro yibikoresho byo gutunganya mullite ceramics.Intego yuru rupapuro rwo gusuzuma ni ugukusanya no gusuzuma uburyo butandukanye bwo gutunganya mullite ceramics yakoresheje imyanda itandukanye yinganda nkibikoresho byo gutangira.Iri suzuma risobanura kandi ubushyuhe bwiyongera ninyongeramusaruro zikoreshwa mugutegura n'ingaruka zacyo.Kugereranya imbaraga zombi zubukanishi no kwagura ubushyuhe bwamafumbire ya mullite yateguwe kuva mumyanda itandukanye yinganda nabyo byavuzwe muriki gikorwa.

Mullite, bakunze kwita 3Al2O3 ∙ 2SiO2, ni ibikoresho byiza bya ceramique kubera imiterere yumubiri idasanzwe.Ifite ahantu hanini cyane gushonga, coefficient nkeya yo kwaguka k'ubushyuhe, imbaraga nyinshi ku bushyuhe bwo hejuru, kandi ifite ihungabana ry'ubushyuhe ndetse no guhangana n'ibikurura [1].Iyi miterere idasanzwe yubushyuhe nubukanishi ituma ibikoresho byakoreshwa mubisabwa nko kuvunika, ibikoresho byo mu itanura, insimburangingo ya catalitike ihindura, imiyoboro y'itanura, n'ingabo zikingira ubushyuhe.

Mullite irashobora kuboneka gusa nk'amabuye y'agaciro make ku kirwa cya Mull, muri otcosse.Bitewe no kubaho kwayo bidasanzwe muri kamere, ubukorikori bwa mullite bukoreshwa mu nganda bwakozwe n'abantu.Hakozwe ubushakashatsi bwinshi mu gutegura ububumbyi bwa mullite ukoresheje preursors zitandukanye, uhereye ku miti yo mu nganda / laboratoire yo mu rwego rwa laboratoire [3] cyangwa ibisanzwe bisanzwe bya aluminiyose [4].Nyamara, ikiguzi cyibi bikoresho byo gutangira kirahenze, gihuzwa cyangwa cyacukuwe mbere.Haraheze imyaka, abashakashatsi barondera ubundi buryo bwubukungu bwo guhuza ceramics ya mullite.Niyo mpamvu, ibitabo byinshi bya mullite byakomotse ku myanda yo mu nganda byavuzwe mu bitabo。 Iyi myanda yo mu nganda ifite ibintu byinshi bya silika yingirakamaro na alumina, ibyo bikaba ari ibintu bya shimi bya ngombwa bikenerwa mu gukora ubukorikori bwa mullite.Izindi nyungu zo gukoresha iyi myanda yinganda ningufu nogukoresha ikiguzi niba imyanda yarayobowe ikongera ikoreshwa nkibikoresho byubwubatsi.Byongeye kandi, ibi birashobora kandi gufasha kugabanya umutwaro wibidukikije no kuzamura inyungu zubukungu.

Kugirango hakorwe iperereza niba imyanda ya electroceramics isukuye ishobora gukoreshwa muguhuza ceramika ya mullite, imyanda ya electroceramics isukuye ivanze nifu ya alumina hamwe n imyanda ya electroceramics isukuye nkibikoresho fatizo byagereranijwe.Ingaruka zibikoresho fatizo 'ibice hamwe nubushyuhe bwa sinte kuri microstructure hamwe numubiri. imitungo ya mullite ceramic yarakozweho iperereza.XRD na SEM byakoreshejwe mukwiga icyiciro cya microstructure.

Ibisubizo byerekana ko ibikubiye muri mullite byiyongera hamwe no kuzamura ubushyuhe, kandi icyarimwe ubwinshi bwinshi bwiyongera.Ibikoresho fatizo ni imyanda ya electroceramique isukuye, bityo ibikorwa byo gucumura ni byinshi, kandi inzira yo gucumura irashobora kwihuta, kandi nubucucike nabwo bukiyongera.Iyo mullite yateguwe gusa n imyanda ya electroceramics, ubwinshi bwimbaraga nimbaraga zo kwikuramo nini nini, porotike ni ntoya, kandi nibintu byuzuye bizaba byiza

Bitewe no gukenera ubundi buryo buhendutse kandi bwangiza ibidukikije, imbaraga nyinshi zubushakashatsi zakoresheje imyanda itandukanye yinganda nkibikoresho byo gutangiza umusaruro wa mullite.Uburyo bwo gutunganya, ubushyuhe bwubushyuhe, ninyongeramusaruro zarasubiwemo.Uburyo bwa gakondo bwo gutunganya inzira burimo kuvanga, gukanda, na reaction yo gucumura ya mullite precursor nuburyo bwakoreshwaga cyane kubera ubworoherane kandi bukora neza.Nubwo ubu buryo bushobora kubyara ubukorikori bwa mullite ceramics, ibintu bigaragara bigaragara ko ceramic ya mullite ceramic yavuzweho kuguma munsi ya 50%.Ku rundi ruhande, gukonjesha gukonjesha byagaragaye ko bishobora gutanga umusaruro mwinshi wa mullite ceramic, ufite bigaragara ko ari 67%, ndetse no ku bushyuhe bwo hejuru cyane bwa 1500 ° C.Hakozwe ubushakashatsi ku bushyuhe bukabije hamwe n’inyongeramusaruro zitandukanye zikoreshwa mu gukora mullite.Hifujwe gukoresha ubushyuhe bukabije buri hejuru ya 1500 ° C kugirango habeho umusaruro wa mullite, kubera umuvuduko mwinshi uri hagati ya Al2O3 na SiO2 mubibanziriza.Nyamara, ibintu byinshi bya silika bifitanye isano numwanda mubibanjirije bishobora kuganisha kumiterere cyangwa guhinduka mugihe cy'ubushyuhe bwo hejuru.Ku bijyanye n’inyongeramusaruro, CaF2, H3BO3, Na2SO4, TiO2, AlF3, na MoO3 byavuzwe ko ari imfashanyo ifatika yo kugabanya ubushyuhe bw’icyaha mu gihe V2O5, Y2O3-Dop ZrO2 na 3Y-PSZ zishobora gukoreshwa mu guteza imbere ubukana bw’ubutaka bwa mullite.Doping hamwe ninyongeramusaruro nka AlF3, Na2SO4, NaH2PO4 · 2H2O, V2O5, na MgO byafashaga gukura kwa anisotropique ya mullite whiskers, nyuma bikazamura imbaraga zumubiri nubukomezi bwibumba bya mullite.