Ukutyhila iipropati ezizodwa kunye nethemba lokusetyenziswa kwe-silicon carbide micropowder eluhlaza
Kwinkalo yanamhlanje yetekhnoloji ephezulu, i-silicon carbide micropowder ngokuthe ngcembe iba yeyona nto igxininiswayo kuluntu lwesayensi yezixhobo kunye neempawu zayo ezizodwa kunye neekhemikhali. Le khompawundi yenziwe ngezinto zekhabhoni kunye ne-silicon ibonise amathuba osetyenziso olubanzi kwiindawo ezininzi zoshishino ngenxa yesakhiwo sayo esikhethekileyo sekristale kunye nokusebenza okugqwesileyo. Eli nqaku liza kuphonononga nzulu iipropathi ezizodwa ze-silicon carbide micropowder kunye nokusetyenziswa kwayo kwiinkalo ezahlukeneyo.
1. Iimpawu eziphambili ze-silicon carbide micropowder eluhlaza
I-silicon carbide eluhlaza (i-SiC) yimathiriyeli enzima kakhulu yokwenziwa kwaye iyeyekhompawundi yebhondi edibeneyo. Isakhiwo sayo sekristale sibonisa inkqubo ye-hexagonal kunye nelungiselelo elifana nedayimane. I-silicon carbide micropowder eluhlaza ngokuqhelekileyo ibhekisela kwiimveliso ezinomgubo kunye nobukhulu be-particle ye-microns ye-0.1-100, kwaye umbala wayo ubonisa iithoni ezahlukeneyo ukusuka eluhlaza okhanyayo ukuya kuluhlaza obumnyama ngenxa yobunyulu obuhlukeneyo kunye nomxholo wokungcola.
Ukusuka kulwakhiwo lwemicroscopic, iathom nganye ye-silicon kwikristale ye-silicon carbide yenza ulungelelwaniso lwe-tetrahedral kunye neeathom zekhabhoni ezine. Esi sakhiwo esomeleleyo covalent bond inika imathiriyeli ubulukhuni obuphezulu kakhulu kunye nokuzinza kweekhemikhali. Kuyafaneleka ukuba uqaphele ukuba ubunzima be-Mohs be-silicon carbide eluhlaza bufikelela kwi-9.2-9.3, okwesibini kuphela kwi-diamond kunye ne-cubic boron nitride, eyenza ukuba ingenakulinganiswa kwintsimi ye-abrasives.
2. Iimpawu ezikhethekileyo ze-silicon carbide micropowder eluhlaza
1. Iimpawu ezigqwesileyo zoomatshini
Eyona nto iphawulekayo ye-silicon carbide micropowder eluhlaza bubunzima bayo obuphezulu kakhulu. Ubulukhuni bayo beVickers bunokufikelela kwi-2800-3300kg/mm², nto leyo eyenza ukuba isebenze kakuhle xa ilungisa imathiriyeli enzima. Kwangaxeshanye, i-silicon carbide eluhlaza nayo inamandla acinezelayo kwaye isenokugcina amandla omatshini aphezulu kumaqondo obushushu aphezulu. Olu phawu lwenza kube lula ukuyisebenzisa kwiimeko ezigqithisileyo.
2. Iimpawu ezibalaseleyo ze-thermal
I-thermal conductivity ye-silicon carbide eluhlaza iphezulu njenge-120-200W / (m · K), eyi-3-5 ngamaxesha ensimbi eqhelekileyo. Oku kuqhuba kakuhle kwe-thermal kwenza kube yinto efanelekileyo yokutshatyalaliswa kobushushu. Yintoni emangalisa ngakumbi kukuba i-coefficient yokwandisa i-thermal ye-silicon carbide yi-4.0 × 10⁻⁶/℃ kuphela, oku kuthetha ukuba inozinzo oluhle kakhulu lwe-dimensional xa ubushushu buguquka, kwaye ayiyi kuvelisa i-deformation ebonakalayo ngenxa yokwandiswa kwe-thermal kunye nokunciphisa.
3. Uzinzo lweekhemikhali ezibalaseleyo
Ngokubhekiselele kwiipropathi zeekhemikhali, i-silicon carbide eluhlaza ibonisa ukungabi namandla kakhulu. Iyakwazi ukuxhathisa i-corrosion ye-acids ezininzi, i-alkalis kunye nezisombululo zetyuwa, kwaye inokuhlala izinzile nakwiqondo lokushisa eliphezulu. Iimvavanyo zibonisa ukuba i-silicon carbide eluhlaza isenako ukugcina uzinzo oluhle kwindawo ene-oxidizing engaphantsi kwe-1000 ℃, eyenza ibe nakho ukusetyenziswa kwexesha elide kwiindawo ezinobungozi.
4. Iimpawu zombane ezikhethekileyo
I-silicon carbide eluhlaza yi-wide bandgap semiconductor material kunye ne-bandgap ububanzi be-3.0eV, enkulu kakhulu kune-1.1eV ye-silicon. Olu phawu luyenza ikwazi ukumelana nombane ophezulu kunye namaqondo obushushu, kwaye ineengenelo ezizodwa kwinkalo yezixhobo zombane zamandla. Ukongeza, i-silicon carbide eluhlaza nayo inokuhamba okuphezulu kwe-electron, okwenza kube lula ukuphuhlisa izixhobo eziphezulu ze-frequency.
3. Inkqubo yokulungiselela i-silicon carbide micropowder eluhlaza
Ukulungiswa kwe-silicon carbide micropowder ngokuyinhloko yamkela inkqubo ye-Acheson. Le ndlela ixuba isanti yequartz kunye nepetroleum coke kumlinganiselo othile kwaye izifudumeze ukuya kuma-2000-2500℃ kwiziko lokumelana nokusabela. I-blocky green silicon carbide eveliswe yindlela yokusabela ingena kwiinkqubo ezinje ngokutyumza, ukuhlelwa, kunye nokucholwa ukuze ekugqibeleni ifumane iimveliso ze-micropowder ezinobungakanani bamasuntswana ahlukeneyo.
Kwiminyaka yakutshanje, kunye nenkqubela phambili yeteknoloji, ezinye iindlela zokulungiselela ezintsha ziye zavela. I-Chemical vapor deposition (CVD) inokulungiselela i-high-purity nano-scale green silicon carbide powder; indlela ye-sol-gel inokulawula ngokuchanekileyo ubungakanani be-particle kunye ne-morphology ye powder; indlela yeplasma inokufikelela kwimveliso eqhubekayo kunye nokuphucula ukusebenza kakuhle kwemveliso. Ezi nkqubo zintsha zibonelela ngamathuba amaninzi okuphucula ukusebenza kunye nokwandiswa kwesicelo se-silicon carbide micropowder eluhlaza.
4. Iindawo ezisetyenziswayo eziphambili ze-silicon carbide micropowder eluhlaza
1. Ukusila ngokuchanekileyo kunye nokugulisa
Njenge-abrasive enzima kakhulu, i-silicon carbide micropowder eluhlaza isetyenziswa ngokubanzi kulungiso oluchanekileyo lwekhabhide enesamente, iiseramikhi, iglasi kunye nezinye izinto. Kwishishini le-semiconductor, i-silicon carbide powder eluhlaza ecocekileyo ephezulu isetyenziselwa ukupolisha ii-wafers ze-silicon, kwaye ukusebenza kwayo kokusika kungcono kunokwesiko le-alumina abrasives. Kwintsimi ye-optical component processing, i-silicon carbide powder eluhlaza inokufikelela kwi-nano-scale surface roughness kwaye ihlangabezane neemfuno zokucubungula izinto eziphezulu ezichanekileyo.
2. Izinto ze-ceramic eziphezulu
I-silicon carbide powder eluhlaza yinto ebalulekileyo ekrwada yokulungiswa kweekeramics eziphezulu zokusebenza. Iiseramikhi zolwakhiwo ezineempawu ezigqwesileyo zoomatshini kunye nokuzinza kwe-thermal kunokwenziwa ngokucinezela okutshisayo kwe-sintering okanye iinkqubo ze-reaction sintering. Olu hlobo lwezinto ze-ceramic zisetyenziswa ngokubanzi kumacandelo aphambili afana nezitywina zoomatshini, iibheringi, kunye nemibhobho, ngakumbi kwiimeko ezinzima zokusebenza ezifana nobushushu obuphezulu kunye nokugqwala.
3. Izixhobo zombane kunye ne-semiconductor
Kwintsimi ye-elektroniki, i-silicon carbide powder eluhlaza isetyenziselwa ukulungisa imathiriyeli ye-bandgap semiconductor ebanzi. Izixhobo zamandla ezisekelwe kwi-silicon carbide eluhlaza zine-high-frequency, high-voltage, kunye neempawu zokusebenza eziphezulu zokushisa, kwaye zibonisa amandla amakhulu kwizithuthi zamandla amatsha, iigridi ezihlakaniphile kunye nezinye iindawo. Uphononongo lubonise ukuba izixhobo zamandla e-silicon carbide eziluhlaza zinokunciphisa ilahleko yamandla ngaphezulu kwe-50% xa kuthelekiswa nezixhobo zemveli ezisekwe kwisilicon.
4. Ukuqiniswa okuhlanganisiweyo
Ukongeza i-silicon carbide powder eluhlaza njengesigaba sokuqinisa kwintsimbi okanye i-polymer matrix inokuphucula kakhulu amandla, ukuqina kunye nokumelana nokunxiba kwezinto ezidibeneyo. Kwintsimi ye-aerospace, i-aluminium-based based silicon carbide composites isetyenziselwa ukuvelisa i-lightweight kunye ne-high-high-power structure; kumzi mveliso weemoto, i-silicon carbide eyomeleziweyo yebrake pads ibonisa ukumelana nobushushu obuphezulu.
5. Izinto eziphikisayo kunye neengubo
Ukusebenzisa ukuzinza kobushushu obuphezulu be-silicon carbide eluhlaza, izinto ezichasayo ezisebenza kakhulu zinokulungiswa. Kwishishini lokunyibilikisa isinyithi, izitena ze-silicon carbide refractory zisetyenziswa kakhulu kwizixhobo zobushushu obuphezulu ezifana neziko lokuqhushumba kunye nabaguquli. Ukongeza, i-silicon carbide coatings inokubonelela ngokugqwesileyo kunye nokukhuselwa kokugqwala kwezinto ezisisiseko, kwaye zisetyenziselwa izixhobo zeekhemikhali, iiblade ze-injini kunye nezinye iindawo.