Ho utulla thepa e ikhethang le litebello tsa ts'ebeliso ea silicon carbide micropowder e tala
Lefapheng la kajeno la lisebelisoa tsa theknoloji e phahameng, silicon carbide micropowder butle-butle e fetoha sepheo sa tlhokomelo sechabeng sa mahlale a thepa ka thepa ea eona e ikhethang ea 'mele le ea lik'hemik'hale. Motsoako ona o entsoeng ka likarolo tsa carbon le silicon o bontšitse tebello e pharaletseng ea ts'ebeliso libakeng tse ngata tsa indasteri ka lebaka la sebopeho sa eona se khethehileng sa kristale le ts'ebetso e babatsehang. Sengoliloeng sena se tla hlahloba ka botebo thepa e ikhethang ea silicon carbide micropowder le bokhoni ba eona ba ts'ebeliso likarolong tse fapaneng.
1. Litšobotsi tsa motheo tsa silicon carbide micropowder e tala
Green silicon carbide (SiC) ke thepa ea maiketsetso e matla haholo 'me ke ea motsoako oa covalent bond. Sebopeho sa eona sa kristale se hlahisa tsamaiso ea hexagonal e nang le tlhophiso e kang ea taemane. Hangata silicon carbide micropowder e bua ka lihlahisoa tse phofshoana tse nang le boholo ba likaroloana tsa 0.1-100 microns, 'me' mala oa eona o fana ka mefuta e fapaneng ea lithane ho tloha ho botala bo khanyang ho ea ho botala bo lefifi ka lebaka la bohloeki bo fapaneng le lintho tse sa hloekang.
Ho tloha sebopehong sa microscopic, athomo e 'ngoe le e' ngoe ea silicon e ka har'a kristale e tala ea silicon carbide e theha khokahano ea tetrahedral e nang le liathomo tse 'ne tsa khabone. Sebopeho sena se matla sa covalent se fana ka thepa e thata haholo le botsitso ba lik'hemik'hale. Ke habohlokoa ho hlokomela hore boima ba Mohs ba silicon carbide e tala bo fihla ho 9.2-9.3, ea bobeli ho ea ho daemane le cubic boron nitride, e leng se etsang hore e se ke ea hlola e e-ba teng tšimong ea li-abrasives.
2. Lintho tse ikhethang tsa silicon carbide micropowder e tala
1. Lintho tse babatsehang tsa mechine
Ntho e hlahelletseng ka ho fetesisa ea silicon carbide micropowder ke boima ba eona bo phahameng haholo. Boima ba eona ba Vickers bo ka fihla ho 2800-3300kg/mm², e leng se e etsang hore e sebetse hantle ha e sebetsana le thepa e thata. Ka nako e ts'oanang, silicon carbide e tala e boetse e na le matla a ho hatella 'me e ntse e ka boloka matla a phahameng a mochine mocheso o phahameng. Karolo ena e etsa hore ho khonehe ho e sebelisa maemong a feteletseng.
2. Lintho tse babatsehang tsa mocheso
Thermal conductivity ea silicon carbide e tala e phahame ho feta 120-200W / (m · K), e leng makhetlo a 3-5 a tšepe e tloaelehileng. Ts'ebetso ena e ntle ea mocheso e etsa hore e be thepa e loketseng ea ho senya mocheso. Ntho e tsotehang le ho feta ke hore mocheso oa ho atolosa mocheso oa silicon carbide e tala ke 4.0 × 10⁻⁶/℃ feela, e bolelang hore e na le botsitso bo babatsehang ba dimensional ha mocheso o fetoha, 'me o ke ke oa hlahisa deformation e hlakileng ka lebaka la ho atolosoa ha mocheso le ho fokotseha.
3. Botsitso bo ikhethang ba lik'hemik'hale
Mabapi le thepa ea lik'hemik'hale, silicon carbide e tala e bonts'a inertness e matla haholo. E ka hanela ho bola ha li-acids tse ngata, alkalis le letsoai, 'me e ka lula e tsitsitse esita le mocheso o phahameng. Liteko li bonts'a hore silicon carbide e tala e ntse e ka boloka botsitso bo botle tikolohong ea oxidizing e ka tlase ho 1000 ℃, e etsang hore e khonehe bakeng sa tšebeliso ea nako e telele libakeng tse senyang.
4. Lintho tse khethehileng tsa motlakase
Green silicon carbide ke thepa e pharaletseng ea semiconductor e nang le bandgap bophara ba 3.0eV, e kholo haholo ho feta 1.1eV ea silicon. Tšobotsi ena e e nolofalletsa ho mamella maqhubu a phahameng le mocheso, 'me e na le melemo e ikhethang tšimong ea lisebelisoa tsa motlakase tsa motlakase. Ho phaella moo, silicon carbide e tala e boetse e na le motsamao o phahameng oa elektronike, o etsang hore ho khonehe ho hlahisa lisebelisoa tse phahameng tsa maqhubu.
3. Mokhoa oa ho itokisa oa silicon carbide micropowder e tala
Ho lokisoa ha silicon carbide micropowder haholo ho amohela ts'ebetso ea Acheson. Mokhoa ona o kopanya lehlabathe la quartz le coke ea petroleum ka tekanyo e itseng ebe o li futhumatsa ho 2000-2500 ℃ ka sebōping sa ho hanyetsa bakeng sa ho arabela. The blocky green silicon carbide e hlahisoang ke karabelo e kena lits'ebetsong tse joalo ka ho pshatla, ho hlopha le ho khetha ho fumana lihlahisoa tsa micropowder tsa boholo bo fapaneng.
Lilemong tsa morao tjena, ka tsoelo-pele ea theknoloji, mekhoa e meng e mecha ea ho lokisetsa e hlahile. Lik'hemik'hale tsa mouoane oa lik'hemik'hale (CVD) li ka lokisetsa phofo e phahameng ea nano-scale green silicon carbide powder; mokhoa oa sol-gel o ka laola ka nepo boholo ba likaroloana le morphology ea phofo; mokhoa oa plasma o ka finyella tlhahiso e tsoelang pele le ho ntlafatsa katleho ea tlhahiso. Mekhoa ena e mecha e fana ka menyetla e mengata ea ho ntlafatsa tshebetso le katoloso ea kopo ea silicon carbide micropowder e tala.
4. Libaka tse ka sehloohong tsa kopo ea silicon carbide micropowder e tala
1. Ho sila ka nepo le ho bentša
Joalo ka abrasive e matla haholo, e tala silicon carbide micropowder e sebelisoa haholo ts'ebetsong e nepahetseng ea carbide e entsoeng ka samente, lirafshoa, likhalase le lisebelisoa tse ling. Indasteri ea semiconductor, phofo e tala ea silicon carbide e hloekileng e sebelisoa bakeng sa ho bentša liphaphatha tsa silicon, 'me ts'ebetso ea eona ea ho itšeha e betere ho feta ea li-abrasives tse tloaelehileng tsa alumina. Lefapheng la optical component processing, phofo e tala ea silicon carbide e ka finyella nano-scale surface roughness le ho finyella litlhoko tsa ts'ebetso ea likarolo tse phahameng tsa optical.
2. Lisebelisoa tse tsoetseng pele tsa ceramic
Green silicon carbide powder ke thepa ea bohlokoa e tala bakeng sa ho lokisoa ha li-ceramics tse sebetsang hantle. Li-ceramics tsa meralo tse nang le thepa e ntle ea mochini le botsitso ba mocheso li ka etsoa ka mokhoa o chesang oa ho penya kapa oa ho etsa sintering. Mofuta ona oa thepa ea ceramic e sebelisoa haholo likarolong tsa bohlokoa tse kang litiiso tsa mochini, li-bearings le li-nozzles, haholo-holo maemong a thata a ho sebetsa joalo ka mocheso o phahameng le ho bola.
3. Lisebelisoa tsa elektronike le tsa semiconductor
Lefapheng la elektronike, phofo e tala ea silicon carbide e sebelisoa ho lokisa lisebelisoa tsa semiconductor tse pharaletseng tsa bandgap. Lisebelisoa tsa matla tse thehiloeng holim'a silicon carbide e tala li na le likarolo tse phahameng tsa maqhubu, li-voltage, le mocheso o phahameng oa mocheso, 'me li bontša bokhoni bo boholo likoloing tse ncha tsa matla, li-grids tse bohlale le masimo a mang. Liphuputso li bontšitse hore lisebelisoa tse tala tsa silicon carbide li ka fokotsa tahlehelo ea matla ka ho feta 50% ha e bapisoa le lisebelisoa tse tloaelehileng tsa silicon.
4. Matlafatso a kopantsoeng
Ho eketsa phofo e tala ea silicon carbide e le mohato oa ho matlafatsa tšepe kapa matrix a polymer ho ka ntlafatsa haholo matla, ho thatafala le ho apara ho hanyetsa ha thepa e kopantsoeng. Sebakeng sa sefofane, metsoako ea aluminium e thehiloeng ho silicon carbide e sebelisetsoa ho etsa likarolo tse bobebe le tse matla haholo; indastering ea likoloi, li-brake pads tsa silicon carbide li bonts'a khanyetso e ntle haholo ea mocheso o phahameng.
5. Lisebelisoa tsa refractory le liphahlo
Ho sebelisa botsitso bo phahameng ba mocheso oa silicon carbide e tala, lisebelisoa tse phahameng tse sebetsang hantle li ka lokisoa. Indastering ea ho qhibilihisa tšepe, litene tsa silicon carbide refractory li sebelisoa haholo lisebelisoa tsa mocheso o phahameng joalo ka libono tse phatlohang le li-converter. Ho phaella moo, liphahlo tsa silicon carbide li ka fana ka tšireletso e babatsehang ea ho apara le ho senya bakeng sa lisebelisoa tsa motheo, 'me li sebelisoa ka thepa ea lik'hemik'hale, li-blades tsa turbine le masimo a mang.