SiC single crystal imhando ye Group IV-IV compound semiconductor inoumbwa nezvinhu zviviri, Si na C, mu stoichiometric ratio ye 1:1. Kuoma kwayo kuri pasi pe diamond chete.
Nzira yekuderedza kabhoni yesilicon oxide pakugadzira SiC inonyanya kuenderana nefomula inotevera yemakemikari:
Maitiro ekuderedza kabhoni yesilicon oxide akaomarara, umo tembiricha yemhinduro inokanganisa zvakananga chigadzirwa chekupedzisira.
Mukugadzirira silicon carbide, zvinhu zvakagadziriswa zvinotanga zvaiswa muchoto che resistance. Choto che resistance chine madziro ekupedzisira kumativi ese, ne graphite electrode pakati, uye core yechoto inobatanidza ma electrodes maviri. Pamuganhu wecore yechoto, zvinhu zvakagadziriswa zvinotanga zvaiswa, uye zvinhu zvinoshandiswa kuchengetedza kupisa zvinoiswa pamuganhu. Kana kunyungudutsa kunotanga, choto che resistance chinowedzerwa simba uye tembiricha inokwira kusvika 2,600 kusvika 2,700 degrees Celsius. Simba remagetsi rinopfuudzwa kucharge kuburikidza nepamusoro pecore yechoto, zvichiita kuti ripiswe zvishoma nezvishoma. Kana tembiricha yecharge ikapfuura 1450 degrees Celsius, chemical reaction inoitika kuti igadzire silicon carbide necarbon monoxide gas. Sezvo smelting ichienderera mberi, nzvimbo yekupisa kwakanyanya mucharge inowedzera zvishoma nezvishoma, uye huwandu hwesilicon carbide inogadzirwa huchawedzerawo. Silicon carbide inoramba ichiumbwa muchoto, uye kuburikidza nekubuda kwemvura nekufamba, makristaro anokura zvishoma nezvishoma uye pakupedzisira anoungana kuita makristaro e cylindrical.
Chikamu chemadziro emukati mekristaro chinotanga kuora nekuda kwekupisa kwakanyanya kunodarika 2,600 degrees Celsius. Chinhu chesilicon chinogadzirwa nekuora chinozobatanazve nechinhu checarbon chiri mucharge kuti chigadzire silicon carbide itsva.
Kana makemikari esilicon carbide (SiC) apera uye vira ratonhorera, danho rinotevera rinogona kutanga. Kutanga, madziro evira anobviswa, uye zvinhu zvisina kugadzirwa muvira zvinosarudzwa uye zvinorongwa nechikamu nechikamu. Zvinhu zvisina kugadzirwa zvinopwanywa kuti pave nezvinhu zvakasanganiswa zvatinoda. Tevere, tsvina iri muzvinhu zvisina kugadzirwa inobviswa kuburikidza nekushambidzwa nemvura kana kuchenesa neacid nealkali solutions, pamwe nekuparadzaniswa kwemagineti nedzimwe nzira. Zvinhu zvisina kugadzirwa zvakacheneswa zvinoda kuomeswa uye zvozoongororwa zvakare, uye pakupedzisira pure silicon carbide powder inogona kuwanikwa. Kana zvichidikanwa, upfu uhu hunogona kugadziriswa zvakare zvichienderana nekushandiswa chaiko, senge kuumba kana kukuya zvakanaka, kuti pave nesilicon carbide powder yakapfava.
Matanho chaiwo ndeaya anotevera:
(1) Zvinhu zvisina kugadzirwa
Upfu hudiki hwe silicon carbide yegirini hunogadzirwa nekupwanya silicon carbide yegirini yakakora. Makemikari e silicon carbide anofanira kupfuura 99%, uye carbon ne iron oxide yemahara zvinofanira kunge zviri pasi pe 0.2%.
(2) Yakatyoka
Kupwanya jecha resilicon carbide kuita upfu hwakatsetseka, nzira mbiri dziri kushandiswa muChina parizvino, imwe ndeyekupwanya bhora rinonyorova panguva imwe chete, uye imwe ndeyekupwanya uchishandisa muchina wekufema.
(3) Kupatsanurwa kwemagineti
Hazvina mhosva kuti nzira ipi inoshandiswa kupwanya silicon carbide powder kuita fine powder, wet magnetic separation uye mechanical magnetic separation zvinowanzo shandiswa. Izvi zvinodaro nekuti hapana guruva panguva yekupatsanurwa kwewet magnetic, magnetic materials inoparadzaniswa zvachose, chigadzirwa mushure mekupatsanurwa kwemagnetic chine iron shoma, uye silicon carbide powder inotorwa nezvinhu zvemagnetic inodererawo.
(4) Kuparadzaniswa kwemvura
Nheyo huru yenzira yekuparadzanisa mvura ndeyekushandisa kumhanya kwakasiyana kwekugadzika kwezvikamu zvesilicon carbide zvemadhayamita akasiyana mumvura kuti uite kurongedza saizi yezvikamu.
(5) Kuongororwa kweUltrasonic
Nekuvandudzwa kwetekinoroji ye ultrasonic, yakashandiswawo zvakanyanya mukuongorora tekinoroji ye micro-powder, iyo inogona kugadzirisa matambudziko ekuongorora akadai sekunyungudika kwakasimba, nyore kuungana, magetsi asingachinji, kupfava kwakanyanya, density yakanyanya, uye light specific gravity.
(6) Kuongorora mhando
Kuongororwa kwemhando yeupfu hwe micropowder kunosanganisira kuumbwa kwemakemikari, kuumbwa kwehukuru hwezvidimbu nezvimwe zvinhu. Kuti uwane nzira dzekuongorora uye mwero wemhando, ndapota tarisa "Zvimiro zveSilicon Carbide Technical."
(7) Kugadzira guruva rekukuya
Mushure mekunge upfu hudiki hwaiswa mumapoka uye hwaongororwa, musoro wechinhu unogona kushandiswa kugadzira upfu hwekukuya. Kugadzirwa kweupfu hwekukuya kunogona kuderedza marara uye kuwedzera cheni yechigadzirwa.
Nguva yekutumira: Chivabvu-13-2024