Kodi mbale ya corundum mullite sinter ndi chiyani?

Sinter mbale ndi chida chomwe chimagwiritsidwa ntchito kunyamula ndi kunyamula mluza wa ceramic wowotchedwa mu uvuni wa ceramic.Amagwiritsidwa ntchito kwambiri mu ng'anjo ya ceramic monga chonyamulira chonyamula, kutchinjiriza kutentha ndi kunyamula zida zowotchedwa.Kupyolera mu izo, akhoza kusintha kutentha conduction liwiro la mbale sintering, kupanga mankhwala sintering wogawana mkangano, bwino kuchepetsa mowa mphamvu ndi kufulumizitsa kuwombera liwiro, kusintha linanena bungwe, kuti ng'anjo yemweyo anawotcha mankhwala colorless kusiyana ndi ubwino zina.

Chuma cha Corundum mullite chimakhala ndi kukana kwamphamvu kwamafuta komanso kutentha kwakukulu, komanso kukhazikika kwamankhwala komanso kukana kuvala.Choncho, angagwiritsidwe ntchito mobwerezabwereza pa kutentha kwambiri, makamaka sintered maginito mitima, ceramic capacitors ndi insulating zadothi.

Sintering mankhwala ndi laminated sintering mankhwala.Chigawo chilichonse cha sintering mbale kuphatikiza kulemera kwa mankhwala ndi pafupifupi 1kg, nthawi zambiri l0 wosanjikiza, kotero mbale ya sintering imatha kupirira kukakamiza kopitilira ma kilogalamu khumi.Pa nthawi yomweyo, kupirira kukankhira pamene kusuntha ndi mikangano Mumakonda ndi katundu katundu, komanso ambiri ozizira ndi otentha mkombero, Choncho, ntchito chilengedwe ndi nkhanza kwambiri.

Popanda kuganizira kuyanjana kwa zinthu zitatuzi, alumina ufa, kaolin ndi kutentha kwa calcination zimakhudza kukana kwa kutentha kwa kutentha ndi kukwawa.Kukana kwamphamvu kwamafuta kumawonjezeka ndi kuwonjezera kwa alumina ufa, ndipo kumachepa ndi kuwonjezeka kwa kutentha kwa moto.Pamene kaolin zili 8%, matenthedwe kugwedezeka kukana ndi otsika, kutsatiridwa ndi kaolin zili 9.5%.Kukwawa kumachepa ndi kuwonjezera kwa alumina ufa, ndipo zokwawa zimakhala zotsika kwambiri pamene kaolin ndi 8%.Kutsika kwake kumafikira 1580 ℃.Pofuna kuganizira za kukana kugwedezeka kwa matenthedwe ndi kukwawa kwa zipangizo, zotsatira zabwino zimapezeka pamene zitsulo zotayidwa ndi 26%, kaolin ndi 6.5% ndi kutentha kwa calcination ndi 1580 ℃.

Pali kusiyana pakati pa particles corundum-mullite ndi matrix.Ndipo pali ming'alu yozungulira tinthu tating'onoting'ono, timene timayamba chifukwa cha kusagwirizana kwa kuchuluka kwa matenthedwe kokwanira ndi zotanuka modulus pakati pa tinthu tating'onoting'ono ndi matrix, zomwe zimapangitsa ma microcracks muzinthuzo.Pamene coefficient yowonjezera ya particles ndi matrix sagwirizana, aggregate ndi matrix zimakhala zosavuta kuzilekanitsa zikatenthedwa kapena zitakhazikika.Pakati pawo pali kusiyana pakati pawo, zomwe zimapangitsa kuti ma microcracks awoneke.Kukhalapo kwa ming'alu yaying'ono iyi kungayambitse kuwonongeka kwa zinthu zamakina, koma zinthu zikamatenthedwa ndi kutentha.Pampata pakati pa aggregate ndi matrix, imatha kutenga gawo la buffer zone, yomwe imatha kuyamwa kupsinjika kwina ndikupewa kupsinjika komwe kumangofika pachimake.Panthawi imodzimodziyo, ming'alu ya kutentha kwa matrix idzayima pampata pakati pa particles ndi matrix, zomwe zingalepheretse kufalikira kwa mng'alu.Choncho, kukana kwa kutentha kwa zinthuzo kumatheka.