Kuburitsa pachena hunhu hwakasiyana uye mikana yekushandisa green silicon carbide micropowder
Muminda yezvinhu zvemazuva ano zvetekinoroji yepamusoro, green silicon carbide micropowder iri kuve chinhu chinonyanya kutariswa munharaunda yesainzi yezvinhu nezvinhu ine hunhu hwayo hwepanyama nemakemikari. Iyi compound inoumbwa nezvinhu zvekabhoni nesilicon yakaratidza mikana yakawanda yekushandiswa muminda yakawanda yemaindasitiri nekuda kwechimiro chayo chakakosha chekristaro uye mashandiro ayo akanaka. Chinyorwa chino chichaongorora zvakadzama hunhu hwakasiyana hwegreen silicon carbide micropowder uye kugona kwayo kushandiswa muminda yakasiyana-siyana.
1. Hunhu hwepakutanga hwe green silicon carbide micropowder
Green silicon carbide (SiC) chinhu chakagadzirwa nesimbi yakasimba uye chiri mu covalent bond compound. Chimiro chayo chekristaro chine hexagonal system ine dhayamondi yakafanana nedhaimani. Green silicon carbide micropowder inowanzoreva zvigadzirwa zveupfu zvine saizi ye particle size ye 0.1-100 microns, uye ruvara rwayo runoratidza mavara akasiyana-siyana kubva pagirini rakareruka kusvika pagirini rakasviba nekuda kwekuchena kwakasiyana uye kusvibiswa.
Kubva pachimiro chidiki diki, atomu yega yega yesilicon iri mugirazi re silicon carbide crystal inoumba kubatana kwe tetrahedral nemaatomu mana ekabhoni. Chimiro ichi chakasimba che covalent bond chinoita kuti zvinhu zvive zvakaoma zvakanyanya uye kugadzikana kwemakemikari. Zvakakosha kuziva kuti kuomarara kweMohs kwe green silicon carbide kunosvika 9.2-9.3, kuri kwechipiri kune diamond ne cubic boron nitride, izvo zvinoita kuti isatsiviwe mumunda we abrasives.
2. Hunhu hwakasiyana hwe green silicon carbide micropowder
1. Hunhu hwakanaka hwemakanika
Chinhu chinonyanya kuzivikanwa ne green silicon carbide micropowder ndiko kuoma kwayo kwakanyanya. Kuoma kwayo kweVickers kunogona kusvika 2800-3300kg/mm², izvo zvinoita kuti ishande zvakanaka pakugadzira zvinhu zvakaoma. Panguva imwe chete, green silicon carbide ine simba rakanaka rekudzvanya uye inogona kuramba yakasimba pakupisa kwakanyanya. Izvi zvinoita kuti zvikwanisike kuishandisa munzvimbo dzakaoma.
2. Hunhu hwakanaka hwekupisa
Kufambiswa kwekupisa kwe green silicon carbide kwakakwira kusvika 120-200W/(m·K), inova 3-5 zvakapetwa kupfuura simbi yakajairika. Kufambiswa kwekupisa uku kwakanaka kunoita kuti ive chinhu chakakodzera kupisa. Chinotoshamisa ndechekuti thermal expansion coefficient ye green silicon carbide i4.0×10⁻⁶/℃ chete, zvinoreva kuti ine dimension stability yakanaka kana tembiricha ikachinja, uye haizoburitse deformation yakajeka nekuda kwekuwedzera kwekupisa uye kudzikira.
3. Kugadzikana kwemakemikari kunoshamisa
Panyaya yehunhu hwemakemikari, green silicon carbide inoratidza kusashanda zvakanaka. Inogona kuramba ngura yeasidhi zhinji, alkalis nemunyu, uye inogona kuramba yakasimba kunyangwe pakupisa kwakanyanya. Ongororo dzinoratidza kuti green silicon carbide inogona kuramba yakagadzikana munzvimbo ine oxidizing pasi pe1000℃, izvo zvinoita kuti ikwanise kushandiswa kwenguva refu munzvimbo dzine ngura.
4. Hunhu hwemagetsi hwakakosha
Green silicon carbide imhando ye semiconductor ine bandgap yakafara ine bandgap yakafara ye3.0eV, iyo yakakura kupfuura 1.1eV yesilicon. Iyi nzira inoita kuti ikwanise kutsungirira voltages netembiricha yakakwira, uye ine mabhenefiti akasiyana mumunda wemagetsi ane simba. Pamusoro pezvo, green silicon carbide inewo maerekitironi akawanda, izvo zvinoita kuti zvikwanisike kugadzira michina ine mafrequency akakwira.
3. Maitiro ekugadzirira green silicon carbide micropowder
Kugadzirwa kwe green silicon carbide micropowder kunonyanya kushandisa maitiro eAcheson. Nzira iyi inosanganisa jecha re quartz ne petroleum coke mune imwe chiyero uye inodziisa kusvika 2000-2500℃ muchoto che resistance kuti zviite reaction. Iyo blocky green silicon carbide inogadzirwa ne reaction inoitwa nenzira dzakadai sekupwanya, kuronga, uye kusvuta kuti pakupedzisira iwane zvigadzirwa zve micropowder zvehukuru hwakasiyana.
Mumakore achangopfuura, nekufambira mberi kwetekinoroji, dzimwe nzira itsva dzekugadzirira dzakabuda. Chemical vapor deposition (CVD) inogona kugadzira high-purity nano-scale green silicon carbide powder; nzira ye sol-gel inogona kudzora nemazvo saizi ye particle uye morphology yeupfu; nzira ye plasma inogona kuwana kugadzirwa kunoramba kuripo uye kuvandudza kushanda zvakanaka kwekugadzira. Maitiro matsva aya anopa mikana yakawanda yekuvandudza mashandiro uye kuwedzera kushandiswa kwe green silicon carbide micropowder.
4. Nzvimbo huru dzekushandisa green silicon carbide micropowder
1. Kukuya nekupukuta nemazvo
Sechinhu chinobata-bata zvakanyanya, green silicon carbide micropowder inoshandiswa zvakanyanya mukugadzirisa nemazvo cemented carbide, ceramics, glass nezvimwe zvinhu. Muindasitiri ye semiconductor, high-purity green silicon carbide powder inoshandiswa pakupukuta silicon wafers, uye kucheka kwayo kuri nani pane kwetsika dze alumina abrasives. Mubasa rekugadzirisa optical component, green silicon carbide powder inogona kuwana nano-scale surface roughness uye kusangana nezvinodiwa zve high-precision optical components.
2. Zvinhu zvepamusoro zvedongo
Upfu hwegirini hwesilicon carbide chinhu chakakosha pakugadzira zviumbwa zveceramics zvine simba guru. Zviumbwa zveceramics zvine hunhu hwakanaka hwemakanika uye kugadzikana kwekupisa zvinogona kugadzirwa kuburikidza nekupisa kunopisa kana maitiro ekupisa. Rudzi urwu rwezvinhu zveceramic runoshandiswa zvakanyanya muzvikamu zvakakosha zvakaita sezvisimbiso zvemakanika, mabheringi, uye ma nozzles, kunyanya mumamiriro ekushanda akaomarara akadai sekupisa kwakanyanya uye ngura.
3. Zvishandiso zvemagetsi uye zve semiconductor
Mumunda wezvemagetsi, upfu hwe silicon carbide yegirini hunoshandiswa kugadzira zvinhu zve semiconductor zvine bandgap yakakura. Zvishandiso zvemagetsi zvinobva pa silicon carbide yegirini zvine hunhu hwekushanda hune ma frequency akawanda, high-voltage, uye high-temperature, uye zvinoratidza kugona kukuru mumotokari itsva dzesimba, smart grids nedzimwe nzvimbo. Zvidzidzo zvakaratidza kuti zvishandiso zvemagetsi zve silicon carbide yegirini zvinogona kuderedza kurasikirwa kwesimba neanopfuura 50% zvichienzaniswa nezvishandiso zvechinyakare zve silicon.
4. Kusimbisa kwakabatana
Kuwedzera upfu hwe silicon carbide yakasvibira sechikamu chekusimbisa kune simbi kana polymer matrix kunogona kuvandudza zvakanyanya simba, kuomarara uye kuramba kupfeka kwezvinhu zvakasanganiswa. Mumunda wezvemuchadenga, simbi carbide composites dzakavakirwa pa aluminium dzinoshandiswa kugadzira zvikamu zvechimiro zvakareruka uye zvine simba guru; muindasitiri yemotokari, ma brake pads akasimbiswa ne silicon carbide anoratidza kuramba kwakanyanya kupisa kwakanyanya.
5. Zvinhu zvinodzivirira kusvibiswa kwemhepo uye machira
Tichishandisa kugadzikana kwakanyanya kwesilicon carbide yegirini, zvinhu zvinoramba kushanda zvakanaka zvinogona kugadzirwa. Muindasitiri yekunyungudutsa simbi, zvidhinha zvinoramba kushanda zvakanaka zvesilicon carbide zvinoshandiswa zvakanyanya mumidziyo inodziya zvakanyanya senge maovheni ekuputika uye ma converter. Pamusoro pezvo, machira esilicon carbide anogona kupa dziviriro yakanaka yekupfekwa uye ngura yezvinhu zvepasi, uye anoshandiswa mumidziyo yemakemikari, ma turbine blades nedzimwe nzvimbo.