1. Ucwaningo Lwesayensi Yezinto Ezibalulekile kanye Nobuqotho Besakhiwo
1.1 I-Crystal Chemistry kanye ne-Bonding Characters
(I-Silicon Carbide Crucibles)
I-silicon carbide (I-SiC) i-ceramic ehlangene eyakhiwe nge-silicon nama-athomu e-carbon amiswe ku-tetrahedral latticework., ngokuyinhloko ku-hexagonal (4H, 6H) noma i-cubic (3C) ama-polytypes, ngayinye ibonisa ukuqina kwesibopho se-athomu.
I-Si– C isibopho, ngamandla isibopho nxazonke 318 kJ/mol, ingenye enkulu kunazo zonke kuma-porcelain wezakhiwo, ukunikeza ukuvikeleka okushisayo okukhethekile, ukuqina, kanye nokumelana nokuhlaselwa ngamakhemikhali.
Le nethiwekhi eqinile ye-covalent iphumela kokubalulekile okunephoyinti lokuncibilika elidlulela ngale 2700 °C(sublime), okuyenza ibe enye yezinto zobumba ze-non-oxide eziphikisayo ezitholakala kalula ezisetshenziswa ezisezingeni lokushisa eliphezulu.
Ngokungafani nama-porcelain oxide njenge-alumina, I-SiC igcina amandla emishini kanye nokumelana nokukhuphuka emazingeni okushisa ngaphezulu 1400 °C, lapho izinsimbi eziningi nezitsha zobumba ezivamile ziqala ukuthamba noma ukuwohloka.
I-coefficient yayo encishisiwe yokukhula okushisayo (~ 4.0 × 10 ⁻⁶/ K) kuhlanganiswe ne-high conductivity eshisayo (80– 120 W/(m · k)) inika amandla ukuhamba ngebhayisikili okushisayo ngaphandle kokuhlukana okulimazayo, isibaluli esibalulekile sokusebenza kwe-crucible.
Lezi zakhiwo ezingokwemvelo zivela ekulinganiseni kahle kwe-electronegativity kanye nosayizi we-athomu ofanayo we-silicon ne-carbon., ezikhuthaza uhlaka lwekristalu oluzinzile futhi olugcwele kakhulu.
1.2 I-Microstructure kanye Nokuqina Kwemishini
I-Silicon carbide crucibles ivamise ukwenziwa ngama-Sintered noma ama-React-bonded SiC powders., nge-microstructure edlala umsebenzi oqondile wokuqina kanye nokumelana nokushaqeka okushisayo.
I-Sintered SiC crucibles idalwe nge-solid-state noma i-liquid-phase sintering emazingeni okushisa ngaphezulu. 2000 °C, ngokuvamile nge-boron noma izithasiselo zekhabhoni zokuthuthukisa ukuminyana kanye nokuhlangana komkhawulo wokusanhlamvu.
Le nqubo yakha ukuminyene ngokuphelele, uhlaka oluhle kakhulu olune-porosity encane (
I-Advanced Ceramics yasungulwa ngo-Okthoba 17, 2012, yibhizinisi lobuchwepheshe obuphezulu elizinikele ocwaningweni nasekuthuthukisweni, ukukhiqiza, ukucubungula, ukuthengisa kanye nezinsizakalo zobuchwepheshe zezinto eziphathelene ne-ceramic nemikhiqizo. Imikhiqizo yethu ihlanganisa kodwa ingagcini nje nge-Boron Carbide Ceramic Products, I-Boron Nitride Ceramic Products, Imikhiqizo ye-Silicon Carbide Ceramic, Imikhiqizo ye-Silicon Nitride Ceramic, I-Zirconium Dioxide Ceramic Products, njll. Uma unentshisekelo, sicela ukhululeke ukuxhumana nathi.
Omaka: I-Silicon Carbide Crucibles, I-Silicon Carbide Ceramic, I-Silicon Carbide Ceramic Crucibles
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