Fasahar Shiri Na Alumina Ceramics (2)

Hanyar gyare-gyare mai bushewa

Alumina yumburabusassun gyare-gyaren gyare-gyaren fasaha yana iyakance ga siffa mai tsabta da kauri na bango fiye da 1mm, tsawon zuwa diamita rabo bai wuce 4∶1 samfurori ba.Hanyoyin kafawa sune uniaxial ko biaxial.Latsa yana da na'ura mai aiki da karfin ruwa, inji iri biyu, na iya zama Semi-atomatik ko atomatik gyare-gyare.Matsakaicin matsa lamba na latsa shine 200Mpa, kuma fitarwa na iya kaiwa 15 ~ 50 guda a minti daya.

Saboda daidaitaccen bugun bugun jini na latsawa na hydraulic, tsayin sassan latsa ya bambanta lokacin da cika foda ya bambanta.Duk da haka, matsa lamba da aka yi amfani da shi ta hanyar latsawa na inji ya bambanta tare da adadin foda mai cikawa, wanda zai iya haifar da bambanci a cikin girman girman bayan ƙaddamarwa kuma ya shafi ingancin samfurori.Saboda haka, da uniform rarraba foda barbashi a bushe latsa tsari yana da matukar muhimmanci ga mold cika.Ko yawan cikon daidai ne ko a'a yana da babban tasiri akan daidaiton girman girman sassan yumbura na alumina da aka kera.Za'a iya samun sakamako mafi girma na kyauta lokacin da ƙwayoyin foda sun fi girma fiye da 60μm kuma tsakanin 60 ~ 200 raga, kuma za'a iya samun sakamako mafi kyau na matsa lamba.

Hanyar yin gyare-gyare

Gouting gyare-gyare ita ce hanyar farko ta gyare-gyaren da aka yi amfani da ita a cikialumina ceramics.Saboda yin amfani da gypsum mold, ƙananan farashi da sauƙi don samar da girman girman girman, sassa masu rikitarwa, maɓallin gyare-gyaren gyare-gyare shine shirye-shiryen alumina slurry.Yawancin lokaci tare da ruwa a matsayin matsakaiciyar juye, sannan ƙara manne dissolving wakili da ɗaure, cikakken bayan nika shaye, sa'an nan kuma zuba a cikin filastar mold.Saboda adsorption na ruwa ta capillary na gypsum mold, slurry yana da ƙarfi a cikin mold.M grouting, a cikin mold bango adsorption slurry kauri har zuwa da ake bukata, amma kuma bukatar zuba fitar da wuce haddi slurry.Domin rage shrinkage na jiki, babban taro slurry ya kamata a yi amfani da nisa kamar yadda zai yiwu.

Ya kamata a ƙara abubuwan ƙarawa zuwa gaalumina yumbuslurry don samar da nau'in lantarki guda biyu akan saman slurry barbashi ta yadda za a iya dakatar da slurry a tsaye ba tare da hazo ba.Bugu da kari, shi wajibi ne don ƙara vinyl barasa, methyl cellulose, alginate amine da sauran dauri da kuma polypropylene amine, Larabci danko da sauran dispersants, da manufar shi ne ya sa slurry dace da grouting gyare-gyaren aiki.

Sintering fasaha

Hanyar fasaha na densifying granular yumbu jiki da kafa m abu ake kira sintering.Sintering hanya ce ta kawar da ɓarna tsakanin ɓangarori a cikin jikin billet, cire ɗan ƙaramin iskar gas da ƙazanta daga kwayoyin halitta, ta yadda ɓangarorin suka girma tare kuma su zama sabbin abubuwa.

Na'urar dumama da ake amfani da ita don harbi gabaɗaya tanderun lantarki ce.Bugu da kari ga al'ada matsa lamba sintering, wato, ba tare da matsa lamba sintering, zafi latsa sintering da zafi isostatic latsa sintering.Ci gaba da matsawa zafi na iya ƙara yawan samarwa, amma farashin kayan aiki da ƙira ya yi yawa, ban da tsawon samfurin yana iyakance.Hot isostatic matsa lamba sintering rungumi dabi'ar high zafin jiki da kuma high matsa lamba gas matsayin matsa lamba canja wurin matsakaici, wanda yana da amfani da uniform dumama a duk kwatance, kuma ya dace da sintering na hadaddun kayayyakin.Saboda tsarin daidaituwa, kayan kayan sun karu da 30 ~ 50% idan aka kwatanta da matsi mai sanyi.10 ~ 15% sama da talakawa zafi latsa sintering.