1. Product Scientific Research and Structural Stability

1.1 Crystal Chemistry and Bonding Characteristics

(Silicon Carbide Crucibles)

Silicon carbide (SiC) is a covalent ceramic composed of silicon and carbon atoms prepared in a tetrahedral latticework, primarily in hexagonal (4H, 6H) or cubic (3C) polytypes, each showing extraordinary atomic bond toughness.

The Si– C bond, with a bond power of around 318 kJ/mol, is amongst the greatest in architectural ceramics, conferring superior thermal stability, hardness, and resistance to chemical attack.

This durable covalent network results in a product with a melting point surpassing 2700 ° 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 strength and creep resistance at temperatures above 1400 ° C, where lots of metals and standard porcelains start to soften or break down.

Its reduced coefficient of thermal growth (~ 4.0 × 10 ⁻⁶/ K) incorporated with high thermal conductivity (80– 120 W/(m · K)) makes it possible for rapid thermal cycling without devastating fracturing, a crucial attribute for crucible performance.

These innate residential or commercial properties originate from the balanced electronegativity and similar atomic sizes of silicon and carbon, which advertise a very stable and densely loaded crystal structure.

1.2 Microstructure and Mechanical Durability

Silicon carbide crucibles are typically fabricated from sintered or reaction-bonded SiC powders, with microstructure playing a crucial duty in resilience and thermal shock resistance.

Sintered SiC crucibles are created via solid-state or liquid-phase sintering at temperatures above 2000 ° C, frequently with boron or carbon ingredients to boost densification and grain border cohesion.

This procedure yields a fully dense, fine-grained structure 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