Qhov tseem ceeb ntawm kev ua haujlwm thiab kev siv ciam teb ntawmsilicon hlau(Si Ntau dua los yog sib npaug rau 98%) yog txiav txim siab los ntawm nws cov purity. Hlau (Fe), txhuas (Al), thiab calcium (Ca) yog lub ntsiab impurities, thiab lawv cov ntsiab lus ncaj qha cuam tshuam rau deoxidation efficiency, alloying nyhuv, thiab downstream khoom zoo ntawm hlau silicon. Kev tswj xyuas meej ntawm cov ntsiab lus tsis huv yog qhov tseem ceeb rau kev ua kom haum rau cov ntawv thov siab - kawg.
Cov yam ntxwv tseem ceeb thiab cov qauv txwv ntawm Fe, Al, thiab Ca Impurities hauv Silicon Hlau
| Qib | Fe cov ntsiab lus txwv | Cov ntsiab lus txwv | Ca cov ntsiab lus txwv | Tag nrho cov ntsiab lus impurities | Cov xwm txheej tseem ceeb ntawm daim ntawv thov |
| 553# | Tsawg dua los yog sib npaug li 0.5% | Tsawg dua lossis sib npaug li 0.4% | Tsawg dua lossis sib npaug li 0.3% | Tsawg dua lossis sib npaug li 1.3% | Feem ntau aluminium alloys, steelmaking deoxidation |
| 441# | Tsawg dua lossis sib npaug li 0.4% | Tsawg dua lossis sib npaug li 0.4% | Tsawg dua lossis sib npaug li 0.1% | Tsawg dua lossis sib npaug li 0.9% | High-kawg aluminium alloys, precision casting |
| 3303# | Tsawg dua lossis sib npaug li 0.3% | Tsawg dua lossis sib npaug li 0.3% | Tsawg dua lossis sib npaug li 0.03% | Tsawg dua lossis sib npaug li 0.63% | Photovoltaic polysilicon, semiconductors |
| 2202 # (Ntau Qib) | Tsawg dua lossis sib npaug li 0.2% | Tsawg dua lossis sib npaug li 0.2% | Tsawg dua lossis sib npaug li 0.02% | Tsawg dua lossis sib npaug li 0.42% | Electronic-cov ntaub ntawv qib silicon, tshwj xeeb alloys |
Nco tseg:Fe thiab Al yooj yim tsim cov khoom sib xyaw nyuaj thiab nkig (xws li AlSi₃ thiab FeSi₂), thaum Ca tau nkag siab nrog cov pa oxygen thiab sulfur kom tsim qis - melting- cov ntsiab lus suav nrog. Tag nrho peb cov impurities txo qhov purity thiab kev ruaj ntseg ntawm cov hlau silicon nrog cov ntsiab lus nce.
Quantitative cuam tshuam rau kev ua haujlwm thiab kev siv
Kev cuam tshuam ntawm hlau
Mechanical zog:
Cov ntsiab lus hlau siab tuaj yeem txo cov neeg kho tshuab lub zog thiab hardness ntawm silicon hlau thiab ua kom yooj yim rau deform.
Cov tshuaj tiv thaiv oxidation:
Hlau yog yooj yim oxidized nyob rau hauv silicon hlau los tsim hlau oxide, uas cuam tshuam qhov txo ntawm silicon thiab txo cov deoxidation nyhuv.
Melting point effect:
Lub xub ntiag ntawm hlau tuaj yeem txo qhov melting point ntawm silicon hlau thiab cuam tshuam rau nws tus cwj pwm thaum lub sij hawm smelting txheej txheem.
Kev cuam tshuam ntawm aluminium
Smelting kev ua tau zoo:
Aluminium yuav hnov mob nrog silicon los tsim cov txhuas silicide, uas cuam tshuam rau kev txo qis thiab tshuaj lom neeg ruaj khov ntawm silicon hlau.
Cov tshuaj tiv thaiv oxidation:
Aluminium kuj tseem yooj yim rau oxidize thiab tuaj yeem tsim txhuas oxide ntawm qhov kub thiab txias, cuam tshuam rau purity thiab txo kev ua haujlwm ntawm silicon hlau.
Kev cuam tshuam ntawm calcium
Kev txo tus neeg ua haujlwm:
Calcium tuaj yeem txhim kho kev txo qis ntawm silicon hlau thiab txhim kho nws cov peev xwm txo qis rau oxides.
Solid solubility:
Cov khoom solubility ntawm calcium nyob rau hauv silicon hlau yog txwv. Yog tias nws dhau ib qho kev txwv, nws yuav tsim ib theem khoom, cuam tshuam rau purity thiab lattice qauv ntawm silicon.
Impurity Cov ntsiab lus txwv rau Core Application Scenarios
| Daim ntawv thov Scenario | Fe Tsawg dua lossis sib npaug | Al Tsawg dua lossis sib npaug | Ca Tsawg dua los yog sib npaug | Pom zoo hom |
| Feem ntau aluminium alloys, steelmaking deoxidation | 0.5% | 0.5% | 0.3% | 553# |
| High-kawg aluminium alloys, precision casting | 0.4% | 0.4% | 0.1% | 441# |
| Photovoltaic polysilicon, semiconductors | 0.3% | 0.3% | 0.03% | 3303# |
| Electronic-qib organosilicon, tshwj xeeb alloys | 0.2% | 0.2% | 0.02% | 2202# |
Zuag qhia tag nrho, qhov cuam tshuam ntawm cov impurities ntawm cov hlau silicon nyob ntawm lawv cov ntsiab lus thiab cov ntawv thov tshwj xeeb. Hauv kev tsim khoom, cov khoom siv ntawm silicon hlau feem ntau yog nruj me ntsis tswj thiab hloov kho kom ntseeg tau tias nws ua tau raws li cov kev cai tshwj xeeb thiab cov kev xav tau ntawm daim ntawv thov.
