Ukutyhila iipropati ezizodwa kunye namathuba okusetyenziswa kwe-green silicon carbide micropowder
Kwintsimi yezinto zobuchwepheshe obuphezulu zanamhlanje, i-green silicon carbide micropowder kancinci kancinci iba yinto ephambili kuluntu lwesayensi yezinto ngezinto kunye neempawu zayo ezizodwa zomzimba nezekhemikhali. Le khompawundi yenziwe ngezinto zekhabhoni kunye ne-silicon ibonise amathuba amaninzi okusetyenziswa kwiindawo ezininzi zoshishino ngenxa yesakhiwo sayo esikhethekileyo sekristale kunye nokusebenza kwayo okugqwesileyo. Eli nqaku liza kuhlola nzulu iimpawu ezikhethekileyo ze-green silicon carbide micropowder kunye namandla ayo okusetyenziswa kwiindawo ezahlukeneyo.
1. Iimpawu ezisisiseko ze-micropowder eluhlaza ye-silicon carbide
I-green silicon carbide (SiC) yinto eyenziwe ngezinto eziqinileyo kwaye iyinxalenye ye-covalent bond compound. Isakhiwo sayo sekristale sibonisa inkqubo ye-hexagonal enolungiselelo olufana nedayimani. I-green silicon carbide micropowder idla ngokubhekisa kwiimveliso zomgubo ezinobubanzi bee-particles eziyi-0.1-100 microns, kwaye umbala wayo ubonisa iintlobo ngeentlobo zeetoni ukusuka kuluhlaza olukhanyayo ukuya kuluhlaza obumnyama ngenxa yokwahluka kobunyulu kunye nomxholo wokungcola.
Ukusuka kwisakhiwo esincinci, iathom nganye yesilicon kwikristale yesilicon carbide eluhlaza yenza ulungelelwaniso lwe-tetrahedral kunye neeathom ezine zekhabhoni. Olu lwakhiwo lwe-covalent bond oluqinileyo lunika izinto ubulukhuni obuphezulu kakhulu kunye nokuzinza kweekhemikhali. Kubalulekile ukuqaphela ukuba ubulukhuni beMohs besilicon carbide eluhlaza bufikelela kwi-9.2-9.3, bulandela idayimani kunye ne-cubic boron nitride, nto leyo eyenza ukuba ingathathelwa indawo kwicandelo le-abrasives.
2. Iipropati ezizodwa ze-micropowder eluhlaza ye-silicon carbide
1. Iipropati ezibalaseleyo zoomatshini
Eyona nto iphawulekayo kwi-green silicon carbide micropowder bubunzima bayo obuphezulu kakhulu. Ubunzima bayo beVickers bunokufikelela kwi-2800-3300kg/mm², nto leyo eyenza ukuba isebenze kakuhle xa kusetyenzwa izinto eziqinileyo. Kwangaxeshanye, i-green silicon carbide inamandla okuxinzelela kwaye isenokugcina amandla aphezulu oomatshini kumaqondo obushushu aphezulu. Olu phawu lwenza kube nokwenzeka ukuyisebenzisa kwiindawo ezishushu kakhulu.
2. Iipropati ezibalaseleyo zobushushu
Ukuqhuba kobushushu kwe-green silicon carbide kuphezulu njenge-120-200W/(m·K), okuphindwe kathathu ukuya kahlanu kunentsimbi eqhelekileyo. Olu kuqhuba kobushushu kubalaseleyo kuyenza ibe yinto efanelekileyo yokusasaza ubushushu. Okumangalisa nangakumbi kukuba i-thermal expansion coefficient ye-green silicon carbide yi-4.0×10⁻⁶/℃ kuphela, oko kuthetha ukuba inozinzo oluhle kakhulu xa ubushushu butshintsha, kwaye ayizukuvelisa ukuguquguquka okucacileyo ngenxa yokwanda nokuncipha kobushushu.
3. Uzinzo olubalaseleyo lweekhemikhali
Ngokuphathelele iipropati zeekhemikhali, i-green silicon carbide ibonisa ukungangeni kakuhle. Iyakwazi ukumelana nokugqwala kwe-asidi ezininzi, i-alkalis kunye nezisombululo zetyuwa, kwaye inokuhlala izinzile nokuba kubushushu obuphezulu. Uvavanyo lubonisa ukuba i-green silicon carbide isenokuhlala izinzile kwindawo ene-oxidizing engaphantsi kwe-1000℃, nto leyo eyenza ukuba ikwazi ukusetyenziswa ixesha elide kwiindawo ezine-corrosive.
4. Iipropati zombane ezikhethekileyo
I-silicon carbide eluhlaza sisixhobo se-semiconductor esibanzi se-bandgap esinobubanzi be-bandgap obuyi-3.0eV, obukhulu kakhulu kune-1.1eV ye-silicon. Olu phawu luyenza ikwazi ukumelana nee-voltages eziphezulu kunye namaqondo obushushu, kwaye luneengenelo ezikhethekileyo kwicandelo lezixhobo ze-elektroniki ezinamandla. Ukongeza, i-silicon carbide eluhlaza ikwanayo nokuhamba kwe-electron okuphezulu, okwenza kube nokwenzeka ukuphuhlisa izixhobo ezisebenzisa i-frequency ephezulu.
3. Inkqubo yokulungiselela i-green silicon carbide micropowder
Ukulungiswa kwe-green silicon carbide micropowder ikakhulu kusebenzisa inkqubo ye-Acheson. Le ndlela ixuba isanti ye-quartz kunye ne-petroleum coke ngomlinganiselo othile kwaye izifudumeze ukuya kwi-2000-2500℃ kwisithando sokumelana ukuze ziphendule. I-blocky green silicon carbide eveliswa yi-reaction idlula kwiinkqubo ezifana nokutyumza, ukuhlela, kunye nokucola ukuze ekugqibeleni kufumaneke iimveliso ze-micropowder zobukhulu obahlukeneyo bezinto ezincinci.
Kwiminyaka yakutshanje, ngokuhambela phambili kwetekhnoloji, kuye kwavela iindlela ezintsha zokulungiselela. I-Chemical vapor deposition (CVD) ingalungiselela umgubo we-silicon carbide eluhlaza ococekileyo kakhulu; indlela ye-sol-gel ingalawula ngokuchanekileyo ubungakanani be-particle kunye ne-morphology yomgubo; indlela ye-plasma ingafezekisa imveliso eqhubekayo kwaye iphucule ukusebenza kakuhle kwemveliso. Ezi nkqubo zintsha zibonelela ngamathuba amaninzi okwenza ngcono ukusebenza kunye nokwandiswa kokusetyenziswa kwe-green silicon carbide micropowder.
4. Iindawo eziphambili zokusetyenziswa kwe-micropowder eluhlaza ye-silicon carbide
1. Ukugaya nokupolisha ngokuchanekileyo
Njenge-superhard abrasive, i-green silicon carbide micropowder isetyenziswa kakhulu ekucwangcisweni ngokuchanekileyo kwe-carbide efakwe isamente, iiseramikhi, iglasi kunye nezinye izinto. Kwishishini le-semiconductor, i-high-purity green silicon carbide powder isetyenziselwa ukupolisha ii-silicon wafers, kwaye ukusebenza kwayo kokusika kungcono kunokwe-alumina abrasives yendabuko. Kwicandelo lokucubungula izinto ze-optical, i-green silicon carbide powder inokufikelela kwi-nano-scale surface roughness kwaye ihlangabezane neemfuno zokucubungula izinto ze-optical ezichanekileyo kakhulu.
2. Izixhobo zodongwe eziphucukileyo
Umgubo we-silicon carbide eluhlaza sisixhobo esibalulekileyo sokulungiselela ii-ceramics ezisebenza kakuhle. Ii-ceramics zesakhiwo ezineempawu ezintle zoomatshini kunye nozinzo lobushushu zinokwenziwa ngeenkqubo zokusinyisa ngoxinzelelo olushushu okanye iinkqubo zokusinyisa ngokusabela. Olu hlobo lwezinto ze-ceramic lusetyenziswa kakhulu kwiindawo eziphambili ezifana nezitywino zoomatshini, iibheringi, kunye nee-nozzles, ingakumbi kwiimeko zokusebenza ezinzima ezifana nobushushu obuphezulu kunye nokugqwala.
3. Izixhobo ze-elektroniki kunye nezixhobo ze-semiconductor
Kwicandelo le-elektroniki, umgubo we-silicon carbide eluhlaza usetyenziselwa ukulungiselela izixhobo ze-semiconductor ezibanzi. Izixhobo zamandla ezisekelwe kwi-silicon carbide eluhlaza zineempawu zokusebenza ezisebenza rhoqo, ezine-voltage ephezulu, kunye nobushushu obuphezulu, kwaye zibonisa amandla amakhulu kwizithuthi zamandla amatsha, iigridi ezikrelekrele kunye nezinye iindawo. Izifundo zibonise ukuba izixhobo zamandla ze-silicon carbide eluhlaza zinokunciphisa ukulahleka kwamandla ngaphezulu kwe-50% xa kuthelekiswa nezixhobo zemveli ezisekelwe kwi-silicon.
4. Ukuqinisa okudityanisiweyo
Ukongeza umgubo we-silicon carbide eluhlaza njengesigaba sokuqinisa kwi-metal okanye kwi-polymer matrix kunokuphucula kakhulu amandla, ubulukhuni kunye nokumelana nokuguguleka kwezinto ezidityanisiweyo. Kwicandelo leenqwelo-moya, ii-silicon carbide ezidityanisiweyo ezisekwe kwi-aluminium zisetyenziselwa ukuvelisa iindawo zesakhiwo ezikhaphukhaphu nezinamandla aphezulu; kwishishini leemoto, ii-brake pads eziqinisiweyo ze-silicon carbide zibonisa ukumelana okuhle kakhulu nobushushu obuphezulu.
5. Izinto ezivuselelayo kunye neengubo zokugquma
Kusetyenziswa uzinzo oluphezulu lwe-silicon carbide eluhlaza, izinto ezivuselelayo ezisebenza kakuhle zinokulungiswa. Kwishishini lokunyibilikisa intsimbi, izitena ezivuselelayo ze-silicon carbide zisetyenziswa kakhulu kwizixhobo ezitshisayo ezinje ngee-blast ovens kunye nee-converters. Ukongeza, iingubo ze-silicon carbide zinokubonelela ngokhuseleko oluhle kakhulu lokuguguleka kunye nokugqwala kwezinto ezisisiseko, kwaye zisetyenziswa kwizixhobo zeekhemikhali, ii-turbine blades nakwezinye iindawo.