Iteknoloji ye-silicon carbide ceramic kunye nokusetyenziswa kwayo kwintsimi ye-photovoltaic

I. Isakhiwo se-Silicon carbide kunye neempawu

I-Silicon carbide SiC iqulethe i-silicon kunye nekhabhoni. Yinto eqhelekileyo i-polymorphic compound, ngokukodwa iquka i-α-SiC (uhlobo oluzinzileyo lobushushu obuphezulu) kunye ne-β-SiC (uhlobo oluzinzile lweqondo lokushisa eliphantsi). Kukho iipolymorphs ezingaphezu kwe-200, phakathi kwazo i-3C-SiC ye-β-SiC kunye ne-2H-SiC, i-4H-SiC, i-6H-SiC, kunye ne-15R-SiC ye-α-SiC imele ngakumbi.

Umzobo we-SiC i-polymorph structure Xa ubushushu bungaphantsi kwe-1600℃, i-SiC ikhona ngendlela ye-β-SiC, enokwenziwa kumxube olula we-silicon kunye nekhabhoni kwiqondo lokushisa malunga ne-1450℃. Xa ingaphezulu kwe-1600℃, i-β-SiC iguquka kancinane ibe ziipolymorphs ezahlukeneyo ze-α-SiC. I-4H-SiC kulula ukuyivelisa malunga ne-2000 ℃; I-6H kunye ne-15R i-polytypes kulula ukuyivelisa kumaqondo aphezulu aphezulu ngaphezu kwe-2100 ℃; I-6H-SiC inokuhlala izinzile kakhulu kumaqondo obushushu angaphezu kwama-2200 ℃, ngoko ke ixhaphake kakhulu kwizicelo zamashishini. I-silicon carbide ecocekileyo yikristale engenambala kwaye ecacileyo. I-industrial silicon carbide ayinambala, tyheli, ukukhanya okuluhlaza, okuluhlaza okumnyama, okuluhlaza okwesibhakabhaka, okuluhlaza okwesibhakabhaka kunye nokuba mnyama, kunye nenqanaba lokungafihli liyancipha ngokulandelelana. Umzi-mveliso we-abrasive wahlula i-silicon carbide ibe ngamacandelo amabini ngokombala: i-silicon carbide emnyama kunye ne-silicon carbide eluhlaza. Ezingenambala ukuya kuluhlaza obumnyama zihlelwa njenge-silicon carbide eluhlaza, kwaye ukukhanya okuluhlaza ukuya kwabamnyama zihlelwa njenge-silicon carbide emnyama. Zombini i-silicon carbide emnyama kunye ne-silicon carbide eluhlaza ziikristale ze-α-SiC ezinehexagonal. Ngokubanzi, ii-silicon carbide ceramics zisebenzisa i-silicon carbide powder eluhlaza njengezinto ezikrwada.

2. Inkqubo yokulungiselela i-silicon carbide ceramic

I-silicon carbide izinto ze-ceramic zenziwe ngokutyumza, ukugaya kunye nokulinganisa i-silicon carbide izinto eziluhlaza ukufumana iinqununu ze-SiC kunye nokusabalalisa ubungakanani be-particle, kwaye emva koko ucinezela amaqhekeza e-SiC, izongezo ze-sintering kunye ne-adhesives yesikhashana kwi-blank blank, kwaye emva koko i-sintering kwiqondo lokushisa eliphezulu. Nangona kunjalo, ngenxa yeempawu eziphezulu ze-covalent bond ye-Si-C bond (~ 88%) kunye ne-low diffusion coefficient, enye yeengxaki eziphambili kwinkqubo yokulungiselela ubunzima be-sintering densification. Iindlela zokulungiselela i-silicon carbide ceramics ezinoxinano oluphezulu zibandakanya ukusabela kokusabela, ukuntywila ngaphandle koxinzelelo, ukucofa uxinzelelo lwe-atmospheric, ukucinezela okutshisayo, ukutshiza kwakhona, ukucofa i-isostatic sintering, i-spark plasma sintering, njl.

Nangona kunjalo, iiseramics ze-silicon carbide zinentswelo yokuqina kokwaphuka okuphantsi, oko kukuthi, ukuqina okukhulu. Ngenxa yesi sizathu, kwiminyaka yakutshanje, i-multiphase ceramics esekwe kwi-silicon carbide ceramics, njenge-fiber (okanye i-whisker) yokuqinisa, ukomeleza ukuchithwa kwe-particle kunye ne-gradient functional materials ziye zavela emva komnye, ziphucula ukuqina kunye namandla ezinto eziphathekayo.

3. Ukusetyenziswa kwe-silicon carbide ceramics kwintsimi ye-photovoltaic

I-silicon carbide ceramics inokumelana ne-corrosion egqwesileyo, inokuxhathisa ukukhukuliseka kwezinto zeekhemikhali, ukwandisa ubomi benkonzo, kwaye ayiyi kukhulula iikhemikhali ezinobungozi, ezihlangabezana neemfuno zokukhusela indalo. Kwangaxeshanye, iinkxaso ze-silicon carbide boat nazo zineenzuzo ezingcono zeendleko. Nangona ixabiso lezinto ze-silicon carbide ngokwazo liphezulu, ukuqina kwazo kunye nokuzinza kunokunciphisa iindleko zokusebenza kunye nokutshintshwa kwamaxesha. Ekuhambeni kwexesha, banenzuzo ephezulu yezoqoqosho kwaye baye baba yimveliso eqhelekileyo kwimarike yenkxaso ye-photovoltaic.

Xa i-silicon carbide ceramics isetyenziswa njengezinto eziphambili zokuthwala kwinkqubo yokuvelisa iiseli ze-photovoltaic, izixhaso zesikhephe, iibhokisi zeenqanawa, izifakelo zemibhobho kunye nezinye iimveliso ezenziwe zinozinzo oluhle lwe-thermal, azikhubazeki kumaqondo aphezulu, kwaye azikho izinto eziyingozi ezingcolisayo. Bangathatha indawo yenkxaso yesikhephe sequartz esetyenziswa ngoku, iibhokisi zesikhephe, kunye nokufakelwa kwemibhobho, kwaye banenzuzo enkulu yeendleko. Izixhaso zeSilicon carbide boat zenziwe ngesilicon carbide njengeyona nto iphambili. Xa kuthelekiswa nenkxaso yesikhephe se-quartz yendabuko, izixhaso ze-silicon carbide boat zinozinzo olungcono lwe-thermal kwaye zinokugcina uzinzo kwiindawo eziphakamileyo zobushushu. I-Silicon carbide boat isekela iqhuba kakuhle kwindawo yokushisa ephezulu kwaye ayichatshazelwa lula bubushushu kunye nokukhubazeka okanye ukonakala. Zifanelekile kwiinkqubo zokuvelisa ezifuna unyango oluphezulu lokushisa, olulungele ukugcina uzinzo kunye nokuhambelana kwenkqubo yokuvelisa.

Ubomi benkonzo: Ngokutsho kohlalutyo lwengxelo yedatha: Ubomi benkonzo ye-silicon carbide ceramics bungaphezulu kwamaxesha e-3 eyokuxhasa isikhephe, iibhokisi zeenqanawa, kunye nezixhobo zombhobho ezenziwe ngezinto ze-quartz, ezinciphisa kakhulu ukuphindaphinda kokutshintshwa kwezinto ezisetyenziswayo.