Sei SiC-Coated Graphite Crucibles Inosarudza Kugadzirwa Kwakasimba Kwehuwandu?

Mukugadzirwa kweSiC crystal growth line, mainjiniya mazhinji anotarisa pakugadzirwa kwenzvimbo inopisa, macurve ekudzora tembiricha, uye kuumbwa kweupfu. Asi kana kuchinja kwegoho kuchiitika, chikonzero chikuru chinowanzo dzokera kuchikamu chimwe chete—chinopfumbira. Hachibudisi chiedza, hachitendereri, uye hachionekwi se "core parameter" mumadhirowa. Asi kana layer ikabviswa pamusoro, crystal ikaumbwa panzvimbo isiriyo, kana kabhoni yakawandisa ikabuda kubva pakona, zvikanganiso zvinobuda muboule rese zvinoita kuti chimwe chinhu chive pachena: chikamu ichi hachisi basa rekutsigira.

Kuwedzera kwekuvapo kweZvigadziko zve graphite zvakaputirwa neSiCMumidziyo yekukura kwekristaro yesemiconductor ine tsananguro iri nyore: tembiricha, mhepo, uye simba rekutakura zvinhu munzvimbo yekukura zviri kusundira miganhu yekushanda kwezvinhu. Graphite yakanaka kwazvo maererano nekudzivirira kupisa, kugona kushanda, uye kutamiswa kwekupisa—asi inouya nehunhu hwayo: kusagadzikana, kubvumidzwa kwemvura., Kushandiswa kwemakemikari pamwe chete nemarudzi eutsi kana tsvina, uye njodzi dzisingadzivisike dzekuumbwa kweupfu uye kugadzirwa kwezvikamu. SiC coating inoshanda sechidziviriro chakasimba pakurwadziwa uku.

Sei Uchifanira Kushandisa SiC Coating PaGraphite Crucibles?

Zvikonzero zvikuru zvitatu:

1. Deredza kushanduka kwemhepo mumhepo uye reactivity yekabhoni

Graphite inotanga kunyungudika pakupisa kwakanyanya, kunyangwe kana paine gasi risina simba. Kabhoni inoburitswa inochinja makemikari echikamu chemhepo panguva yekukura kwePVT, ichikanganisa kinetics yekuisa zvinhu mumhepo uye ichikurudzira kuumbwa kwezvikanganiso kana kuti kusagadzikana kwekukura.

2. Deredza kusvibiswa kwezvinhu

Kunyangwe graphite yakadzvanywa ne isostatically high-purity ine ma micro-pores uye ine katsika kekusveta mhando dzakadai sevapor precursors, byproducts, kana hunyoro. Izvi zvinogona kuburitswa gare gare panguva yekupisa kwakanyanya, zvichikanganisa kuchena kwekristaro. SiC coating inovhara ma pores uye inowedzera kuchena kwezvakatipoteredza.

3. Wedzera hupenyu hwembeu uye deredza kupararira kwembeu

Mushure mekumhanya kakawanda, pamusoro pegirafiti panogona kuora: kupwanyika, kusvuuka, kutsemuka, uye kusungirirwa kwezvinhu. Izvi zvinokonzeresa kusvibiswa kwezvikamu uye goho shoma. Kuvhara kwakasimba kweSiC kunogona kunonotsa zvakanyanya mashandiro akadaro ekutadza, zvichichengetedza kusimba kwenzvimbo uye kuvimbika kwayo.

Kudzora Maitiro Ekuvhara Kunoona Kuvimbika Kwemoto

Nzira huru yekuputira ndeye CVD(Chemical Vapor Deposition) ye polycrystalline SiC. Yakura uye inogara zvakanaka pakupisa. Zvisinei, kuva nependi haina kukwana—musiyano chaiwo pakushanda kwemunda unoenderana nezvinhu zvakanaka zvakaita se:

● Kuenzana kweukobvu hwekuputira

Magadzirirwo akaomarara ezvipfukuto—matanho, migero, zvimedu—anogadzira nzvimbo dzine mumvuri kana kuti dzisina kudzika ukobvu hwekufukidza hunogona kuderera pasi pehuwandu hwakatarwa. Nzvimbo idzi dzakatetepa dzinova dzekutanga kuora kana paine kushushikana nekupisa.

Mhinduro:Mupi wependi anofanira kunge aine 3D flow-field control chaiyo uye dynamic rotation systems kuti ave nechokwadi chekuti yakafukidzwa zvakaenzana kunyangwe pazvikamu zvakaoma.

● Kuwanda kwezvipfeko uye kubviswa kwegomba remuchina

Kana CVD parameters (tembiricha, gasi, nguva yekugara) ikasadzorwa zvakanyanya, maburi madiki anogona kuumbwa. Aya anova nzvimbo dzekutanga kukundikana sezvo kabhoni ichibuda uye ngura yemunzvimbo yacho ichiitika.

Kuonekwa:Ukobvu hwepakutanga uye kuongorora nemaziso hazvina kukwana. Shandisa bvunzo dzekubuda kwehelium kana bvunzo dzekudzikisa uremu panguva dzakasiyana-siyana dzekupisa kuti uone maburi akavanda.

● Simba rekunamatira uye kuramba kupisa

SiC negrafiti zvine ma coefficient akasiyana ekuwedzera kwekupisa. Kana kushushikana kwasara mujira repurasitiki kusina kuderedzwa, kana kuti kugadziriswa kweganda/kugadziriswa kweganda kusina kukwana, kuchenesa kunogona kuitika panguva yekupisa.

Maitiro Akanakisisa:Tarisa kuti grit-blast uye ultrasonic cleaning isati yaiswa pendi, uye simbisa kuti thermal stress inotsungirira sei nekushandisa turbine chaiyo.

Maitiro Ekutadza Anowanzoitwa uye Kukanganisa Kwavo Kwekristaro

Mukugadzirwa, kana crucible ikakundikana, kukanganisa kunowanzova kwete ppm shoma chete, asi kurasikirwa kwebatch yakazara uye mavhiki akawanda ekuvhiringidza kugona. Iri harisi dambudziko guru chete—idambudziko rekugadzikana kwesystem.