Momwe mungapangire ma graphite crucibles

graphite cruciblendi chinthu chapadera chomwe chimagwira ntchito yofunikira pakuyenga golide, siliva, mkuwa ndi zitsulo zina zamtengo wapatali.Ngakhale kuti anthu ambiri sangadziwe bwino, kupanga ma graphite crucibles kumaphatikizapo magawo angapo ovuta kuti atsimikizire ubwino wapamwamba ndi mphamvu zamakina za chinthu chomaliza.M'nkhaniyi, tikambirana mwatsatanetsatane gawo lililonse lomwe likukhudzidwa ndi kupanga ma graphite crucible.

Gawo loyambirira la kupanga ma graphite crucibles limaphatikizapo kuyanika.Pambuyo popanga crucible ndi pendenti yake yothandizira, amawunikidwa molingana ndi zomwe zatha.Kufufuza uku kumatsimikizira kuti anthu oyenerera okha ndi omwe amapita ku magawo otsatirawa.Pambuyo kusanja, iwo amadutsa glazing ndondomeko, mmene crucible pamwamba yokutidwa ndi glaze.Kuwala kumeneku kumagwira ntchito zingapo, kuphatikiza kukulitsa kachulukidwe ndi mphamvu zamakina a crucible, pamapeto pake kuwongolera bwino kwake.

Gawo lowombera ndi gawo lofunika kwambiri pakupanga.Zimaphatikizapo kuyika graphite crucible ku kutentha kwakukulu mu uvuni, motero kumalimbitsa dongosolo la crucible.Izi ndizofunikira kuti zitsimikizire kukhazikika komanso kudalirika kwa crucible panthawi yoyenga.Mfundo yowombera ikhoza kugawidwa m'magawo anayi osiyanasiyana kuti mumvetse bwino kusintha komwe kumachitika mu crucible structure panthawiyi.

Gawo loyamba ndi preheating ndi kuwombera siteji, ndipo kutentha mu ng'anjo imasungidwa pafupifupi 100 mpaka 300 ° C.Panthawi imeneyi, chinyezi chotsalira mu crucible chimachotsedwa pang'onopang'ono.Tsegulani kuwala kwa ng'anjo ndikuchepetsa kutentha kuti muteteze kusinthasintha kwadzidzidzi.Kuwongolera kutentha ndikofunikira panthawiyi, chifukwa chinyezi chambiri chotsalira chimapangitsa kuti crucible iphwanyike kapena kuphulika.

Gawo lachiwiri ndi siteji yowotchera yotsika, ndi kutentha kwa 400 mpaka 600 ° C.Pamene ng'anjo ikupitirira kutentha, madzi omangika mkati mwa crucible amayamba kusweka ndi kutuluka nthunzi.Zigawo zazikuluzikulu za A12O3 ndi SiO2, zomwe poyamba zidamangidwa ku dongo, zimayamba kukhalapo mwaulere.Komabe, ziyenera kudziwidwa kuti glaze wosanjikiza pamwamba pa crucible sichinasungunukebe.Kuti mupewe zodabwitsa zilizonse, kutentha kwa kutentha kuyenera kukhala kocheperako komanso kokhazikika.Kutentha kofulumira komanso kosafanana kungayambitse crucible kusweka kapena kugwa, kusokoneza kukhulupirika kwake.

Polowa gawo lachitatu, kutentha kwapakati pa kutentha kumakhala pakati pa 700 ndi 900 ° C.Panthawi imeneyi, amorphous Al2O3 mu dongo amasinthidwa pang'ono kuti apange Y-mtundu wa crystalline Al2O3.Kusintha uku kumawonjezeranso kukhulupirika kwa kapangidwe ka crucible.Ndikofunikira kusunga kutentha moyenera panthawiyi kuti tipewe zotsatira zosafunika.

Gawo lomaliza ndi siteji yowotchera kwambiri, ndi kutentha pamwamba pa 1000 ° C.Panthawiyi, glaze wosanjikiza pamapeto pake imasungunuka, kuonetsetsa kuti pamwamba pa crucible ndi yosalala komanso yosindikizidwa.Kutentha kwapamwamba kumathandizanso kuti makina a crucible akhale olimba komanso olimba.

Zonsezi, kupanga ma graphite crucibles kumaphatikizapo magawo angapo osamalitsa.Kuyambira kuumitsa ndikuyang'ana chinthu chomwe chatsirizidwa mpaka kuwombera ndi kuwombera, sitepe iliyonse ndiyofunikira kuti muwonetsetse kuti chitsulo chomaliza cha graphite ndi chodalirika komanso chodalirika.Kutsatira njira zowongolera kutentha ndikusunga kutentha koyenera ndikofunikira kuti tipewe zovuta zilizonse kapena ngozi.Chotsatira chake ndi chitsulo chamtengo wapatali cha graphite chomwe chimatha kupirira kuyeretsa mwamphamvu kwazitsulo zamtengo wapatali.