Kuzarura zvivakwa zvakasarudzika uye tarisiro yekushandisa yegirini silicon carbide micropowder
Mumunda wemazuva ano wezvigadzirwa zvepamusoro-soro, girini silicon carbide micropowder iri kuita zvishoma nezvishoma kutarisisa munharaunda yesainzi yemidziyo ine yakasarudzika yemuviri nemakemikari zvimiro. Komisheni iyi inoumbwa nekabhoni nesilicon zvinhu yakaratidza tarisiro yakafara yekushandiswa muminda yakawanda yemaindasitiri nekuda kwechimiro chayo chekristaro uye kuita kwakanakisa. Ichi chinyorwa chichaongorora zvakadzama hunhu hwakasiyana hwegirini silicon carbide micropowder uye kugona kwayo kwekushandisa munzvimbo dzakasiyana siyana.
1. Basic maitiro egirini silicon carbide micropowder
Green silicon carbide (SiC) chinhu chekugadzira chakanyanya kuoma uye ndeye covalent bond compound. Chimiro chayo chekristaro chinopa hexagonal system ine dhaimondi-yakafanana kuronga. Green silicon carbide micropowder inowanzoreva zvigadzirwa zvehupfu zvine huwandu hwesaizi ye 0.1-100 microns, uye ruvara rwayo rwunopa ma toni akasiyana kubva pachiedza chakasvibirira kusvika parima girinhi nekuda kwekuchena kwakasiyana uye kusachena kwemukati.
Kubva pachimiro chemicroscopic, atomu imwe neimwe yesilicon mune yegirini silicon carbide crystal inoumba tetrahedral kurongeka nemaatomu mana kabhoni. Ichi chakasimba covalent bond chimiro chinopa zvinhu zvakanyanya kuomarara uye kugadzikana kwemakemikari. Zvakakosha kucherechedza kuti kuoma kweMohs yegirini silicon carbide inosvika 9.2-9.3, yechipiri chete kune diamond uye cubic boron nitride, iyo inoita kuti isadzokeke mumunda weabrasives.
2. Zvinhu zvakasiyana-siyana zvegreen silicon carbide micropowder
1. Yakanakisa michina zvinhu
Chinhu chinonyanya kukosha chegirini silicon carbide micropowder ndiko kuoma kwayo kwakanyanya. Kuoma kwayo kweVickers kunogona kusvika 2800-3300kg/mm², izvo zvinoita kuti iite zvakanaka kana ichigadzira zvinhu zvakaoma. Panguva imwecheteyo, green silicon carbide zvakare ine yakanaka yekumanikidza simba uye inogona kuramba ichichengetedza yakakwira mechanicha simba pakupisa kwakanyanya. Ichi chimiro chinoita kuti zvikwanise kuishandisa munzvimbo dzakanyanyisa.
2. Excellent thermal properties
Thermal conductivity yegreen silicon carbide yakakwira kusvika 120-200W/(m·K), inova 3-5 times yesimbi yakajairika. Iyi yakanakisa yekupisa conductivity inoita kuti ive yakanaka yekupisa kupisa zvinhu. Chinotonyanya kushamisa ndechekuti thermal yekuwedzera coefficient yegreen silicon carbide ingori 4.0 × 10⁻⁶/℃, izvo zvinoreva kuti ine yakanakisa dimensional kugadzikana kana tembiricha ichichinja, uye haizobudisi pachena deformation nekuda kwekuwedzera kwekupisa uye kuputika.
3. Kunyatsogadzikana kwemakemikari
Panyaya yemakemikari zvivakwa, green silicon carbide inoratidza inertness yakasimba kwazvo. Inogona kudzivisa kuora kweakawanda acids, alkalis uye munyu mhinduro, uye inogona kuramba yakagadzikana kunyange pakupisa kwakanyanya. Ongororo dzinoratidza kuti green silicon carbide inogona kuramba yakagadzikana munzvimbo ine oxidizing iri pasi pe1000 ℃, iyo inoita kuti igone kushandiswa kwenguva refu munzvimbo dzinoparadza.
4. Zvinhu zvakakosha zvemagetsi
Green silicon carbide yakakura bandgap semiconductor zvinhu ine bandgap yakafara ye 3.0eV, iyo yakakura zvakanyanya kupfuura 1.1eV yesilicon. Iyi ficha inoigonesa kutsungirira yakakwirira voltages uye tembiricha, uye ine yakasarudzika mabhenefiti mumunda wemagetsi zvigadzirwa zvemagetsi. Pamusoro pezvo, green silicon carbide zvakare ine yakakwira erekitironi kufamba, izvo zvinoita kuti zvikwanise kugadzira yakakwirira-frequency zvishandiso.
3. Kugadzirira nzira yegirini silicon carbide micropowder
Kugadzirira kwegirini silicon carbide micropowder kunonyanya kutora maitiro eAcheson. Iyi nzira inosanganisa jecha requartz uye petroleum coke mune imwe chikamu uye inodzipisa kusvika 2000-2500 ℃ muchoto chekupikisa kuti uite. Iyo blocky yegirini silicon carbide inogadzirwa nemaitiro inopinda maitiro akadai sekupwanya, giredhi, uye pickling kuti pakupedzisira uwane zvigadzirwa zve micropowder zvemhando dzakasiyana siyana.
Mumakore achangopfuura, nekufambira mberi kwetekinoroji, dzimwe nzira nyowani dzekugadzirira dzakabuda. Kemikari vapor deposition (CVD) inogona kugadzirira yakakwirira-kuchena nano-scale green silicon carbide powder; iyo sol-gel nzira inogona kunyatso kudzora saizi yechikamu uye morphology yehupfu; iyo plasma nzira inogona kuwana inoenderera kugadzirwa uye kuvandudza kugadzirwa kwakanaka. Aya maitiro matsva anopa mikana yakawanda yekuita optimization uye kushandiswa kwekuwedzera kwegirinhi silicon carbide micropowder.
4. Nzvimbo huru dzekushandisa dzegirini silicon carbide micropowder
1. Kukuya nekukwenenzvera
Seyakaomesesa abrasive, yakasvibira silicon carbide micropowder inoshandiswa zvakanyanya mukunyatso kugadzirwa kwecemented carbide, ceramics, girazi uye zvimwe zvinhu. Muindasitiri yesemiconductor, yakakwira-kuchena girini silicon carbide poda inoshandiswa kukwenenzvera silicon wafers, uye kuita kwayo kwekucheka kuri nani pane kuya kwechinyakare alumina abrasives. Mumunda we optical component processing, green silicon carbide powder inogona kuwana nano-scale surface roughness uye inosangana nezvinodiwa zvekugadzirisa zvepamusoro-zvakanyatsojeka zvikamu zvemaziso.
2. Advanced ceramic zvinhu
Green silicon carbide poda chinhu chakakosha mbishi kugadzirira kwepamusoro-inoshanda ceramics. Structural ceramics ine yakanakisa mechaniki zvivakwa uye kugadzikana kwekupisa kunogona kuitwa kuburikidza nekupisa kudzvanya sintering kana reaction sintering maitiro. Rudzi urwu rweceramic zvinhu runoshandiswa zvakanyanya muzvinhu zvakakosha senge mechaniki zvisimbiso, mabhengi, uye nozzles, kunyanya mumamiriro ekushanda akaomarara senge tembiricha yepamusoro uye ngura.
3. Zvigadzirwa zvemagetsi uye semiconductor
Mumunda wemagetsi, girini silicon carbide poda inoshandiswa kugadzira yakakura bandgap semiconductor zvinhu. Zvishandiso zvemagetsi zvinobva pagirini silicon carbide zvine high-frequency, high-voltage, uye yakakwirira-tembiricha yekushanda maitiro, uye inoratidza kugona kukuru mumagetsi matsva emagetsi, smart grid uye mamwe minda. Zvidzidzo zvakaratidza kuti girini silicon carbide magetsi emagetsi anogona kuderedza kurasikirwa kwesimba neanopfuura 50% zvichienzaniswa neyakajairwa silicon-based zvishandiso.
4. Composite kusimbisa
Kuwedzera girini silicon carbide poda sechikamu chekusimbisa kune simbi kana polymer matrix inogona kuvandudza zvakanyanya kusimba, kuomarara uye kupfeka kuramba kweiyo inoumbwa zvinhu. Mundima yeaerospace, aluminium-based silicon carbide composites inoshandiswa kugadzira zvikamu zvisingaremi uye zvine simba rakasimba; muindasitiri yemotokari, silicon carbide yakasimbisa mabhureki pads inoratidza yakanakisa yepamusoro-tembiricha kuramba.
5. Refractory zvinhu uye machira
Uchishandisa iyo yakakwirira-yekushisa kugadzikana kwegirini silicon carbide, yakakwirira-inoshanda refractory zvinhu zvinogona kugadzirwa. Muindasitiri yekunyungudutsa simbi, silicon carbide refractory zvidhinha zvinoshandiswa zvakanyanya mumidziyo yekupisa yakanyanya senge blast furnaces uye converters. Uye zvakare, silicon carbide coatings inogona kupa yakanakisa kupfeka uye corrosion kudzivirira kune base zvinhu, uye inoshandiswa mumakemikari emidziyo, turbine blades uye mamwe minda.