SiC single crystal ke sehlopha sa IV-IV sa semiconductor se entsoeng ka likarolo tse peli, Si le C, ka karolelano ea stoichiometric ea 1: 1. Ho thatafala ha eona ho latela daemane feela.
Phokotso ea khabone ea mokhoa oa silicon oxide ho lokisa SiC e thehiloe haholo holima foromo e latelang ea karabelo ea lik'hemik'hale:
Mokhoa oa ho itšoara oa ho fokotsa carbon ea silicon oxide o batla o rarahane, moo mocheso oa karabelo o amang sehlahisoa sa ho qetela ka ho toba.
Ts'ebetsong ea ho lokisa silicon carbide, lisebelisoa tse tala li kenngoa pele ka sebōping sa ho hanyetsa. Sebōpi sa ho hanyetsa se na le marako a ho qetela lipheletsong tse peli, tse nang le electrode ea graphite bohareng, 'me mokokotlo oa sebōpi o kopanya li-electrode tse peli. Karolong ea mokokotlo oa sebōpi, lisebelisoa tse tala tse kenyang letsoho ho arabela li behoa pele, ebe lisebelisoa tse sebelisetsoang ho boloka mocheso li behoa ka thōko. Ha ho qhibiliha ho qala, sebōpi sa ho hanyetsa se matlafatsoa 'me mocheso o nyolohela ho likhato tse 2,600 ho isa ho tse 2,700 tsa Celsius. Matla a mocheso oa motlakase a fetisetsoa ho tefiso ka holim'a mokokotlo oa sebōpi, e leng se etsang hore e be butle-butle. Ha mocheso oa tefiso o feta likhato tse 1450 tsa Celsius, ho hlaha karabelo ea lik'hemik'hale ho hlahisa silicon carbide le khase ea carbon monoxide. Ha ts'ebetso ea ho qhibiliha e ntse e tsoela pele, sebaka sa mocheso o phahameng ka tefiso se tla atoloha butle-butle, 'me palo ea silicon carbide e hlahisoang le eona e tla eketseha. Silicon carbide e lula e etsoa ka sebōping, 'me ka ho fetoha mouoane le ho sisinyeha, likristale li ntse li hōla butle-butle 'me qetellong li bokellana ka har'a likristale tsa cylindrical.
Karolo ea lerako le ka hare la kristale e qala ho senyeha ka lebaka la mocheso o phahameng o fetang likhato tse 2,600 tsa Celsius. Karolo ea silicon e hlahisoang ke ho bola e tla kopana hape le karolo ea khabone ka tefiso ho theha silicon carbide e ncha.
Ha lik'hemik'hale tsa silicon carbide (SiC) li felile 'me sebōpi se pholile, mohato o latelang o ka qala. Ntlha ea pele, marako a sebōpi a qhaqhoa, 'me joale lisebelisoa tse tala ka sebōping li khethoa ebe li kenngoa ka sekhahla ka lera. Lisebelisoa tse tala tse khethiloeng li hatelloa ho fumana thepa ea granular eo re e batlang. Ka mor'a moo, litšila tsa lihlahisoa tse tala li tlosoa ka ho hlatsoa metsi kapa ho hloekisa ka tharollo ea acid le alkali, hammoho le karohano ea makenete le mekhoa e meng. Lisebelisoa tse tala tse hloekisitsoeng li hloka ho omisoa ebe li hlahlojoa hape, 'me qetellong ho ka fumanoa phofo e hloekileng ea silicon carbide. Haeba ho hlokahala, li-powders tsena li ka sebetsoa ka ho eketsehileng ho ea ka tšebeliso ea sebele, e kang ho bōpa kapa ho sila hantle, ho hlahisa phofo e ntle ea silicon carbide.
Mehato e khethehileng ke e latelang:
(1) Lisebelisoa tse tala
Green silicon carbide micro powder e hlahisoa ka ho pshatla silicon carbide e tala. Motsoako oa lik'hemik'hale tsa silicon carbide e lokela ho ba kholo ho feta 99%, 'me carbon le oxide ea tšepe e sa lefelloeng e lokela ho ba ka tlaase ho 0.2%.
(2)E robehile
Ho sila lehlabathe la silicon carbide hore e be phofo e ntle, hona joale ho sebelisoa mekhoa e 'meli Chaena, e 'ngoe ke ho sila leloala la metsi ka nakoana, ha e 'ngoe e silakanya ho sebelisa leloala la phofshoana ea moea.
(3)Karohano ea makenete
Ho sa tsotelehe hore na ho sebelisoa mokhoa ofe ho pshatla silicon carbide phofo hore e be phofo e ntle, karohano ea makenete e metsi le karohano ea makenete ea mochini hangata e sebelisoa. Lebaka ke hobane ha ho na lerōle nakong ea karohano ea matla a khoheli, lisebelisoa tsa makenete li arohane ka ho felletseng, sehlahisoa ka mor'a ho arohana ha makenete se na le tšepe e nyane, 'me phofo ea silicon carbide e nkiloeng ke lisebelisoa tsa makenete le eona e tlase.
(4)Karohano ea metsi
Molao-motheo oa mokhoa oa karohano ea metsi ke ho sebelisa lebelo le fapaneng la ho rarolla tsa silicon carbide likaroloana tsa bophara bo fapaneng ka metsing ho etsa khetho ea boholo ba likaroloana.
(5) Tlhahlobo ea Ultrasonic
Ka nts'etsopele ea theknoloji ea ultrasonic, e boetse e sebelisoa haholo ho hlahloba theknoloji ea phofo ea ultrasonic, e ka rarollang mathata a ho hlahloba a kang adsorption e matla, agglomeration e bonolo, motlakase o phahameng oa static, botle bo phahameng, boima bo phahameng, le matla a khoheli a khethehileng. .
(6)Tlhahlobo ea boleng
Tlhahlobo ea boleng ba micropowder e kenyelletsa sebopeho sa lik'hemik'hale, sebopeho sa boholo ba likaroloana le lintho tse ling. Bakeng sa mekhoa ea tlhahlobo le maemo a boleng, ka kopo sheba "Silicon Carbide Technical Conditions."
(7) Ho hlahisa lerole le silang
Ka mor'a hore phofo e nyenyane e hlophisoe le ho hlahlojoa, hlooho ea thepa e ka sebelisoa ho lokisetsa phofo e silang. Tlhahiso ea phofo e silang e ka fokotsa litšila le ho atolosa ketane ea lihlahisoa.
Nako ea poso: May-13-2024