1. Product Science and Structural Honesty
1.1 Crystal Chemistry and Bonding Characteristics
(Silicon Carbide Crucibles)
Silicon carbide (SiC) is a covalent ceramic made up of silicon and carbon atoms arranged in a tetrahedral lattice, mainly in hexagonal (4H, 6H) or cubic (3C) polytypes, each exhibiting remarkable atomic bond stamina.
The Si– C bond, with a bond power of around 318 kJ/mol, is among the toughest in architectural ceramics, conferring exceptional thermal stability, hardness, and resistance to chemical assault.
This robust covalent network causes a material with a melting point going beyond 2700 Ā° C(sublimes), making it one of the most refractory non-oxide porcelains readily available for high-temperature applications.
Unlike oxide ceramics such as alumina, SiC keeps mechanical toughness and creep resistance at temperature levels above 1400 Ā° C, where numerous metals and conventional ceramics begin to soften or break down.
Its reduced coefficient of thermal expansion (~ 4.0 Ć 10 ā»ā¶/ K) combined with high thermal conductivity (80– 120 W/(m Ā· K)) makes it possible for rapid thermal biking without tragic splitting, a critical characteristic for crucible efficiency.
These innate residential properties stem from the balanced electronegativity and comparable atomic sizes of silicon and carbon, which promote an extremely stable and largely packed crystal framework.
1.2 Microstructure and Mechanical Durability
Silicon carbide crucibles are normally produced from sintered or reaction-bonded SiC powders, with microstructure playing a crucial role in sturdiness and thermal shock resistance.
Sintered SiC crucibles are created via solid-state or liquid-phase sintering at temperature levels over 2000 Ā° C, often with boron or carbon ingredients to enhance densification and grain limit communication.
This procedure generates a fully 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