1. Product Scientific Research and Structural Integrity
1.1 Crystal Chemistry and Bonding Characteristics
(Silicon Carbide Crucibles)
Silicon carbide (SiC) is a covalent ceramic composed of silicon and carbon atoms set up in a tetrahedral lattice, primarily in hexagonal (4H, 6H) or cubic (3C) polytypes, each showing exceptional atomic bond stamina.
The Si– C bond, with a bond energy of around 318 kJ/mol, is among the best in architectural porcelains, providing superior thermal stability, solidity, and resistance to chemical strike.
This durable covalent network leads to a material with a melting point going beyond 2700 ° C(sublimes), making it one of one of the most refractory non-oxide ceramics offered for high-temperature applications.
Unlike oxide ceramics such as alumina, SiC maintains mechanical strength and creep resistance at temperatures over 1400 ° C, where many metals and conventional porcelains start to soften or weaken.
Its low coefficient of thermal development (~ 4.0 × 10 ⁻⁶/ K) incorporated with high thermal conductivity (80– 120 W/(m · K)) allows quick thermal cycling without devastating fracturing, a critical quality for crucible performance.
These inherent residential or commercial properties originate from the well balanced electronegativity and similar atomic dimensions of silicon and carbon, which advertise a highly steady and densely loaded crystal structure.
1.2 Microstructure and Mechanical Resilience
Silicon carbide crucibles are usually produced from sintered or reaction-bonded SiC powders, with microstructure playing a definitive duty in sturdiness and thermal shock resistance.
Sintered SiC crucibles are generated through solid-state or liquid-phase sintering at temperature levels above 2000 ° C, commonly with boron or carbon additives to boost densification and grain border cohesion.
This process yields a totally thick, fine-grained framework with minimal porosity (
Advanced Ceramics founded on October 17, 2012, is a high-tech enterprise committed to the research and development, production, processing, sales and technical services of ceramic relative materials and products. Our products includes but not limited to Boron Carbide Ceramic Products, Boron Nitride Ceramic Products, Silicon Carbide Ceramic Products, Silicon Nitride Ceramic Products, Zirconium Dioxide Ceramic Products, etc. If you are interested, please feel free to contact us.
Tags: Silicon Carbide Crucibles, Silicon Carbide Ceramic, Silicon Carbide Ceramic Crucibles
All articles and pictures are from the Internet. If there are any copyright issues, please contact us in time to delete.
Inquiry us