Ubuchwepheshe be-silicon carbide ceramic kanye nokusetshenziswa kwayo emkhakheni we-photovoltaic

I. Isakhiwo se-silicon carbide kanye nezakhiwo

I-Silicon carbide SiC iqukethe i-silicon ne-carbon. Kuyinhlanganisela evamile ye-polymorphic, ikakhulukazi ehlanganisa i-α-SiC (uhlobo oluzinzile lokushisa eliphezulu) kanye ne-β-SiC (uhlobo oluzinzile lokushisa eliphansi). Kunama-polymorphs angaphezu kuka-200, phakathi kwawo i-3C-SiC ye-β-SiC ne-2H-SiC, i-4H-SiC, i-6H-SiC, ne-15R-SiC ye-α-SiC imele kakhulu.

Umfanekiso we-SiC polymorph structure Lapho izinga lokushisa lingaphansi kuka-1600℃, i-SiC ikhona ngendlela ye-β-SiC, engenziwa ngengxube elula ye-silicon nekhabhoni ekushiseni okungaba ngu-1450℃. Uma ingaphezulu kuka-1600℃, i-β-SiC ishintsha kancane ibe ama-polymorphs ahlukahlukene e-α-SiC. I-4H-SiC kulula ukuyikhiqiza cishe ku-2000 ℃; I-6H kanye ne-15R polytypes kulula ukuyikhiqiza emazingeni okushisa angaphezu kuka-2100 ℃; I-6H-SiC nayo ingahlala izinzile emazingeni okushisa angaphezu kuka-2200 ℃, ngakho ivame kakhulu ezinhlelweni zezimboni. I-silicon carbide ehlanzekile iyikristalu engenambala futhi esobala. I-Industrial silicon carbide ayinambala, ephuzi ngokukhanyayo, eluhlaza okotshani, eluhlaza okwesibhakabhaka, eluhlaza okwesibhakabhaka, eluhlaza okwesibhakabhaka futhi emnyama imbala, nezinga lokubonisa ngale liyancipha ngokulandelana. Imboni ye-abrasive ihlukanisa i-silicon carbide ibe izigaba ezimbili ngokombala: i-silicon carbide emnyama ne-silicon carbide eluhlaza. Ezingenambala ukuya kokuluhlaza okumnyama zihlukaniswa njenge-silicon carbide eluhlaza, futhi eluhlaza okwesibhakabhaka ukuya kwabamnyama zihlukaniswa njenge-silicon carbide emnyama. Kokubili i-silicon carbide emnyama ne-silicon carbide eluhlaza ngamakristalu angama-α-SiC angama-hexagonal. Ngokuvamile, i-silicon carbide ceramics isebenzisa i-silicon carbide powder eluhlaza njengezinto zokusetshenziswa.

2. Inqubo yokulungiselela i-silicon carbide ceramic

I-silicon carbide ceramic material yenziwa ngokuchotshozwa, ukugaya kanye nokufaka izinto zokusetshenziswa ze-silicon carbide ukuze kutholwe izinhlayiya ze-SiC ezinosayizi ofanayo wokusabalalisa usayizi wezinhlayiyana, bese ucindezela izinhlayiya ze-SiC, izithasiselo ze-sintering kanye nezinamatheliso zesikhashana zibe indawo eluhlaza, bese zishisa ngokushisa okuphezulu. Kodwa-ke, ngenxa yezimpawu zebhondi ye-covalent ephezulu yamabhondi e-Si-C (~88%) kanye ne-coefficient ephansi yokusabalalisa, enye yezinkinga eziyinhloko enqubweni yokulungiselela ubunzima bokuminyana kwe-sintering. Izindlela zokulungiselela ze-high-density silicon carbide ceramics zifaka ukusabela ukusabela, ukucwilisa okungenangcindezi, i-atmospheric pressure sintering, i-hot pressing sintering, i-recrystallization sintering, i-isostatic pressing sintering eshisayo, i-spark plasma sintering, njll.

Kodwa-ke, izitsha zobumba ze-silicon carbide zinesimo esibi sokuqina kokuqhekeka okuphansi, okungukuthi, ukuqina okukhulu. Ngenxa yalesi sizathu, eminyakeni yamuva nje, i-multiphase ceramics esekelwe ku-silicon carbide ceramics, njenge-fiber (noma i-whisker) yokuqinisa, ukuqinisa ukuhlakazeka kwezinhlayiyana ezihlukahlukene kanye nezinto ezisebenzayo ze-gradient ziye zavela ngokulandelana, okwenza ngcono ukuqina namandla ezinto zokwakha ze-monomer.

3. Ukusetshenziswa kwe-silicon carbide ceramics emkhakheni we-photovoltaic

I-silicon carbide ceramics inokumelana nokugqwala okuhle kakhulu, ingamelana nokuguguleka kwezinto zamakhemikhali, yandise impilo yesevisi, futhi ngeke ikhiphe amakhemikhali ayingozi, ahlangabezana nezidingo zokuvikela imvelo. Ngasikhathi sinye, izisekelo zesikebhe se-silicon carbide nazo zinezinzuzo ezingcono zezindleko. Nakuba intengo yezinto zokwakha ze-silicon carbide ngokwazo iphakeme kakhulu, ukuqina nokuzinza kwazo kunganciphisa izindleko zokusebenza kanye nemvamisa yokubuyisela. Ngokuhamba kwesikhathi, banezinzuzo eziphakeme zezomnotho futhi baye baba yimikhiqizo evamile emakethe yokusekela isikebhe se-photovoltaic.

Lapho i-silicon carbide ceramics isetshenziswa njengezinto zokuphatha eziyinhloko ekukhiqizeni amaseli e-photovoltaic, izisekelo zesikebhe, amabhokisi esikebhe, ukufakwa kwamapayipi neminye imikhiqizo eyenziwe inokuqina okuhle kokushisa, ayikhubazeki emazingeni okushisa aphezulu, futhi ayinakho ukungcola okulimazayo. Bangangena esikhundleni sezisekelo zesikebhe sequartz ezisetshenziswa njengamanje, amabhokisi ezikebhe, nokufakwa kwamapayipi, futhi zibe nezinzuzo zezindleko ezibalulekile. Izisekelo zesikebhe se-silicon carbide zenziwe nge-silicon carbide njengento eyinhloko. Uma kuqhathaniswa nezisekelo zesikebhe ze-quartz zendabuko, izisekelo zesikebhe se-silicon carbide zinokuzinza okungcono kwe-thermal futhi zingagcina uzinzo ezindaweni zokushisa okuphezulu. Izisekelo ze-silicon carbide boat zisebenza kahle ezindaweni zokushisa okuphezulu futhi azithinteki kalula ukushisa futhi zikhubazekile noma zilimale. Zifanele izinqubo zokukhiqiza ezidinga ukwelashwa kokushisa okuphezulu, okulungele ukugcina ukuzinza nokuvumelana kwenqubo yokukhiqiza.

Impilo yesevisi: Ngokokuhlaziywa kombiko wedatha: Impilo yesevisi ye-silicon carbide ceramics ingaphezu kwezikhathi ezi-3 kunezisekelo zesikebhe, amabhokisi ezikebhe, nokufakwa kwamapayipi okwenziwe ngezinto ze-quartz, okunciphisa kakhulu imvamisa yokushintshwa kwezinto ezisetshenziswayo.