1. Kafukufuku wa Sayansi Yazinthu ndi Kukhulupirika Kwamapangidwe
1.1 Crystal Chemistry ndi Makhalidwe Ogwirizana
(Silicon Carbide Crucibles)
Silicon carbide (SiC) is a covalent ceramic made up of silicon and carbon atoms set up in a tetrahedral latticework, primarily in hexagonal (4H, 6H) or cubic (3C) polytypes, each showing phenomenal atomic bond toughness.
The Si– C mgwirizano, with a bond energy of around 318 kJ/mol, is amongst the greatest in architectural porcelains, giving exceptional thermal security, firmness, and resistance to chemical assault.
This robust covalent network results in a material with a melting point going beyond 2700 °C(sublimes), making it one of the most refractory non-oxide ceramics readily available for high-temperature applications.
Mosiyana ndi oxide porcelains monga aluminiyamu, SiC keeps mechanical strength and creep resistance at temperatures over 1400 °C, where many metals and conventional ceramics begin to soften or deteriorate.
Its reduced coefficient of thermal growth (~ 4.0 × 10 ⁻⁶/ K) integrated with high thermal conductivity (80– 120 W/(m · k)) imathandizira kuyendetsa njinga mwachangu popanda kugawanika kowononga, chikhumbo chofunikira pakuchita kwa crucible.
Nyumba zokhalako izi zimachokera ku electronegativity yabwino komanso kukula kwa atomiki ya silicon ndi kaboni., zomwe zimalimbikitsa kristalo wokhazikika komanso wodzaza kwambiri.
1.2 Microstructure ndi Mechanical Resilience
Silicon carbide crucibles nthawi zambiri amapangidwa kuchokera ku sintered kapena reaction-bond SiC powders., ndi microstructure yomwe imasewera ntchito yotsimikizika yokhazikika komanso kukana kugwedezeka kwamafuta.
Sintered SiC crucibles amapangidwa kudzera pa solid-state kapena madzi-gawo sintering pa kutentha pamwamba. 2000 °C, nthawi zambiri amakhala ndi boron kapena zowonjezera za kaboni kuti apititse patsogolo kachulukidwe komanso kulumikizana kwa malire ambewu.
Njirayi imapanga zowawa kwambiri, chimango chopangidwa bwino chokhala ndi porosity yochepa (
Advanced Ceramics idakhazikitsidwa pa Okutobala 17, 2012, ndi bizinesi yapamwamba yodzipereka ku kafukufuku ndi chitukuko, kupanga, kukonza, malonda ndi ntchito zaukadaulo za zida za ceramic ndi zinthu. Zogulitsa zathu zikuphatikiza, koma osati zokha za Boron Carbide Ceramic Products, Boron Nitride Ceramic Products, Silicon Carbide Ceramic Products, Silicon Nitride Ceramic Products, Zirconium Dioxide Ceramic Products, ndi zina. Ngati muli ndi chidwi, chonde omasuka kulankhula nafe.
Tags: Silicon Carbide Crucibles, Silicon Carbide Ceramic, Silicon Carbide Ceramic Crucibles
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