1. Su'esu'ega Fa'asaienisi Mea ma Fa'atonu Fa'atonu
1.1 Crystal Chemistry ma Uiga Fa'amau
(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 noataga, 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.
E le pei o porcelains oxide e pei ole alumina, 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)) e mafai ai le uila vave vevela e aunoa ma le malepelepe fa'aleagaina, o se uiga taua mo le faʻatinoina o faʻatau.
O nei fale fa'atosina e sau mai le paleni fa'aeletonega fa'aeletonika ma le tele fa'aatomika tutusa o le silicon ma carbon, lea e fa'alauiloa ai se auivi tioata e matua'i mautu ma tele fa'atumuina.
1.2 Microstructure ma Mechanical Resilience
Silicon carbide crucibles e masani lava ona faia mai sintered poʻo tali faʻapipiʻi paʻu SiC, fa'atasi ai ma microstructure o lo'o ta'alo se tiute fa'amaoni i le tumau ma le fa'ate'ia o le vevela.
O fa'a'ota'i SiC ua fa'asusu e fa'atūina e ala i le fa'amalo-malo po'o le vai-vaega sintering i le vevela maualuga i luga 2000 °C, masani ma boron poʻo carbon additives e faʻamalosia ai le densification ma le faʻatapulaʻaina o saito.
O lenei faiga e maua ai se mafiafia atoa, fa'ava'a fa'ama'i lelei ma la'ititi la'ititi (
Advanced Ceramics na faavaeina ia Oketopa 17, 2012, o se pisinisi maualuga-tech tuuto atu i le suesuega ma atinae, gaosiga, faiga, fa'atauga ma 'au'aunaga fa'atekinisi o mea tau sima ma oloa. O a matou oloa e aofia ai ae le gata i Boron Carbide Ceramic Products, Boron Nitride Ceramic Products, Silicon Carbide Ceramic Products, Silicon Nitride Ceramic Products, Zirconium Dioxide Ceramic Products, ma isi. Afai e te fiafia, faamolemole lagona le saoloto e faafesootai matou.
Fa'ailoga: Silicon Carbide Crucibles, Silicon Carbide Ceramic, Silicon Carbide Ceramic Crucibles
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