Silicon carbide ceramic thekenoloji le ts'ebeliso ea eona tšimong ea photovoltaic

I. Silicon carbide sebopeho le thepa

Silicon carbide SiC e na le silicon le carbon. Ke motsoako o tloaelehileng oa polymorphic, haholo-holo ho kenyelletsa α-SiC (mofuta o tsitsitseng oa mocheso o phahameng) le β-SiC (mofuta o tsitsitseng oa mocheso o tlaase). Ho na le li-polymorphs tse fetang 200, tseo har'a tsona 3C-SiC ea β-SiC le 2H-SiC, 4H-SiC, 6H-SiC, le 15R-SiC ea α-SiC e emelang haholoanyane.

Setšoantšo sa SiC polymorph structure Ha mocheso o le ka tlase ho 1600 ℃, SiC e teng ka sebōpeho sa β-SiC, e ka etsoang ka motsoako o bonolo oa silicon le carbon mocheso oa hoo e ka bang 1450 ℃. Ha e phahame ho feta 1600 ℃, β-SiC e fetoha butle-butle ho li-polymorphs tse fapaneng tsa α-SiC. 4H-SiC e bonolo ho e hlahisa ho pota 2000 ℃; Li-polytypes tsa 6H le 15R li bonolo ho hlahisa mocheso o phahameng ka holimo ho 2100 ℃; 6H-SiC e ka boela ea lula e tsitsitse haholo mochesong o ka holimo ho 2200 ℃, kahoo e tloaelehile haholo lits'ebetsong tsa indasteri. Silicon carbide e hloekileng ke kristale e se nang mebala le e bonaletsang. Indasteri silicon carbide ha e na 'mala, e mosehla o bobebe, botala bo bobebe, botala bo lefifi, boputsoa bo lefifi, bo botala bo lefifi esita le botsho, 'me boemo ba ponaletso bo fokotseha ka ho latellana. Indasteri ea abrasive e arola silicon carbide ka mekhahlelo e 'meli ho latela mebala: silicon carbide e ntšo le silicon carbide e tala. Tse se nang mebala ho isa ho tse botala bo lefifi li khetholloa e le silicon carbide e tala, 'me boputsoa bo bobebe ho ea ho botšo li khetholloa e le silicon carbide e ntšo. Ka bobeli silicon carbide e ntšo le silicon carbide e tala ke likristale tsa α-SiC tse hexagonal. Ka kakaretso, li-ceramics tsa silicon carbide li sebelisa phofo e tala ea silicon carbide e le lisebelisoa tse tala.

2. Silicon carbide mokhoa oa ho lokisetsa ceramic

Silicon carbide ceramic material e entsoe ka ho sila, ho sila le ho kenya lisebelisoa tse tala tsa silicon carbide ho fumana likaroloana tsa SiC tse nang le likaroloana tsa boholo ba likaroloana, ebe o hatella likaroloana tsa SiC, li-additives tsa sintering le li-adhesives tsa nakoana sebakeng se setala, ebe se chesa mocheso o phahameng. Leha ho le joalo, ka lebaka la litšoaneleho tse phahameng tsa bond ea Si-C (~ 88%) le coefficient e tlase ea diffusion, e 'ngoe ea mathata a ka sehloohong ts'ebetsong ea ho itokisa ke bothata ba sintering densification. Mekhoa ea ho itokisa ea li-ceramics tsa silicon carbide tse nang le matla a phahameng li kenyelletsa ho etsa sintering, sintering e se nang khatello, sepakapaka sa khatello ea sepakapaka, sintering e chesang e chesang, recrystallization sintering, hot isostatic sintering, spark plasma sintering, joalo-joalo.

Leha ho le joalo, lirafshoa tsa silicon carbide li na le bothata ba ho robeha ho fokolang, ke hore, brittleness e kholoanyane. Ka lebaka lena, lilemong tsa morao tjena, li-ceramics tsa multiphase tse thehiloeng holim'a li-ceramics tsa silicon carbide, tse kang fiber (kapa whisker) reinforcement, lisebelisoa tse fapaneng tse matlafatsang le lisebelisoa tse sebetsang tsa gradient li hlahile ka mor'a tse ling, li ntlafatsa ho tiea le matla a thepa ea monomer.

3. Tšebeliso ea li-ceramics tsa silicon carbide tšimong ea photovoltaic

Li-ceramics tsa silicon carbide li na le khanyetso e ntle ea kutu, li khona ho hanela khoholeho ea lik'hemik'hale, li lelefatsa bophelo ba ts'ebeletso, 'me li ke ke tsa lokolla lik'hemik'hale tse kotsi, tse fihlelang litlhoko tsa ts'ireletso ea tikoloho. Ka nako e ts'oanang, litšehetso tsa sekepe sa silicon carbide le tsona li na le melemo e metle ea litšenyehelo. Le hoja theko ea thepa ea silicon carbide ka boeona e batla e phahame, ho tšoarella ha bona le botsitso ho ka fokotsa litšenyehelo tsa ts'ebetso le makhetlo a mangata. Ha nako e ntse e ea, ba na le melemo e phahameng ea moruo 'me ba fetohile lihlahisoa tse tloaelehileng' marakeng oa tšehetso ea likepe tsa photovoltaic.

Ha li-ceramics tsa silicon carbide li sebelisoa e le lisebelisoa tsa bohlokoa tsa ho tsamaisa liseleng tsa photovoltaic, litšehetso tsa seketsoana, mabokose a likepe, lisebelisoa tsa liphaephe le lihlahisoa tse ling tse entsoeng li na le botsitso bo botle ba mocheso, ha li holofale ka mocheso o phahameng, 'me ha li na litšila tse kotsi. Li ka nka sebaka sa litšehetso tsa seketsoana sa quartz tse sebelisoang hajoale, mabokose a likepe, le liphaephe, 'me li na le melemo e mengata ea litšenyehelo. Litšehetso tsa sekepe sa silicon carbide li entsoe ka silicon carbide e le thepa ea mantlha. Ha ho bapisoa le litšehetso tsa seketsoana sa quartz sa setso, litšehetso tsa sekepe sa silicon carbide li na le botsitso bo betere ba mocheso mme li ka boloka botsitso maemong a mocheso o phahameng. Litšehetso tsa silicon carbide boat li sebetsa hantle maemong a mocheso o phahameng 'me ha li amehe habonolo ke mocheso le ho holofala kapa ho senyeha. Li loketse mekhoa ea tlhahiso e hlokang phekolo e phahameng ea mocheso, e leng se loketseng ho boloka botsitso le ho tsitsa ha mokhoa oa tlhahiso.

Bophelo ba ts'ebeletso: Ho latela tlhahlobo ea tlaleho ea data: Bophelo ba ts'ebeletso ea li-ceramics tsa silicon carbide bo feta makhetlo a 3 ho feta litšehetso tsa likepe, mabokose a likepe le lisebelisoa tsa liphaephe tse entsoeng ka thepa ea quartz, e fokotsang haholo makhetlo a phetisetso ea lisebelisoa.