Kukonzekera Technology ya Alumina Ceramics (2)

Dry kukanikiza akamaumba njira

Alumina ceramicUkadaulo wowuma wowuma umangokhala wokhazikika komanso makulidwe a khoma kuposa 1mm, kutalika mpaka m'mimba mwake siposa 4∶1 mankhwala.Njira zopangira ndi uniaxial kapena biaxial.Makina osindikizira ali ndi ma hydraulic, makina amitundu iwiri, amatha kukhala odziyimira pawokha kapena odzipangira okha.Kuthamanga kwakukulu kwa atolankhani ndi 200Mpa, ndipo zotulutsa zimatha kufika 15 ~ 50 zidutswa pamphindi.

Chifukwa cha kupsinjika kwa yunifolomu ya hydraulic press, kutalika kwa magawo osindikizira kumakhala kosiyana pamene kudzazidwa kwa ufa kuli kosiyana.Komabe, kupanikizika komwe kumagwiritsidwa ntchito ndi makina osindikizira kumasiyanasiyana ndi kuchuluka kwa kudzaza kwa ufa, zomwe zingapangitse kusiyana kwa kukula kwa shrinkage pambuyo pa sintering ndikukhudza ubwino wa mankhwala.Choncho, kugawa yunifolomu ya tinthu ta ufa mu njira youma kukanikiza n'kofunika kwambiri kuti nkhungu kudzazidwa.Kaya kuchuluka kwa kudzaza kuli kolondola kapena ayi kumakhudza kwambiri kuwongolera kolondola kwa magawo opangidwa ndi alumina ceramic.The pazipita ufulu otaya zotsatira akhoza analandira pamene particles ufa ndi zazikulu kuposa 60μm ndi pakati 60 ~ 200 mauna, ndi bwino kuthamanga kupanga zotsatira angapezeke.

Njira yopangira ma grouting

Grouting molding ndiyo njira yoyamba yopangira yomwe imagwiritsidwa ntchitoaluminiyamu ceramics.Chifukwa chogwiritsa ntchito nkhungu ya gypsum, yotsika mtengo komanso yosavuta kupanga kukula kwakukulu, magawo owoneka bwino, fungulo la kuumba kwa grouting ndikukonza alumina slurry.Kawirikawiri ndi madzi monga kutulutsa sing'anga, ndiyeno yikani guluu Kutha wothandizila ndi binder, mokwanira pambuyo akupera utsi, ndiyeno anazitsanulira mwa pulasitala nkhungu.Chifukwa cha kutsekemera kwa madzi ndi capillary ya gypsum mold, slurry imakhazikika mu nkhungu.Hollow grouting, mu nkhungu khoma adsorption slurry makulidwe mpaka chofunika, komanso ayenera kutsanulira owonjezera slurry.Pofuna kuchepetsa kuchepa kwa thupi, slurry yapamwamba iyenera kugwiritsidwa ntchito momwe zingathere.

Zowonjezera za organic ziyenera kuwonjezeredwa kualuminiyamu ceramicslurry kupanga iwiri wosanjikiza magetsi padziko slurry particles kuti slurry akhoza inaimitsidwa stably popanda mpweya.Kuphatikiza apo, m'pofunika kuwonjezera mowa wa vinilu, methyl cellulose, alginate amine ndi zina zomangira ndi polypropylene amine, chingamu cha Arabic ndi dispersants zina, cholinga chake ndikupangitsa kuti slurry ikhale yoyenera kugwira ntchito yopangira grouting.

Sintering luso

Njira yaukadaulo yokulitsa thupi la granular ceramic ndikupanga zinthu zolimba zimatchedwa sintering.Sintering ndi njira yochotsera chopanda pakati pa tinthu tating'onoting'ono ta thupi la billet, kuchotsa pang'ono mpweya ndi zonyansa kuchokera kuzinthu zamoyo, kotero kuti tinthu tikukula pamodzi ndikupanga zinthu zatsopano.

Chida chotenthetsera chomwe chimagwiritsidwa ntchito powotcha nthawi zambiri chimakhala ng'anjo yamagetsi.Kuphatikiza pa kuthamanga kwanthawi zonse, ndiko kuti, popanda kukakamiza, kukakamiza kotentha komanso kutentha kwa isostatic kukanikiza sintering.Kuwotcha kosalekeza kungathe kuonjezera kupanga, koma mtengo wa zipangizo ndi nkhungu ndizokwera kwambiri, kuwonjezera pa kutalika kwa mankhwala ndi ochepa.Hot isostatic pressure sintering utenga kutentha kwambiri ndi mpweya wothamanga kwambiri ngati sing'anga yotengera kuthamanga, yomwe ili ndi mwayi wotenthetsa yunifolomu mbali zonse, ndipo ndiyoyenera kupangira zinthu zovuta.Chifukwa cha mawonekedwe a yunifolomu, zinthu zakuthupi zimawonjezeka ndi 30 ~ 50% poyerekeza ndi kuzizira kozizira.10 ~ 15% apamwamba kuposa wamba otentha kukanikiza sintering.