Porous Graphite with TaC Coating

Semicorex Porous Graphite with TaC Coating combines the unique properties of porous graphite with the protective and enhancing capabilities of a TaC coating, offering significant improvements over traditional materials used in high-temperature crucibles.

Graphite and porous graphite, while widely used for their thermal stability and electrical conductivity, present significant challenges in high-temperature environments. Porous graphite, in particular, is preferred for its high permeability, which allows better gas flow and uniform temperature distribution. However, its high porosity makes it mechanically weak, leading to difficulties in machining and shaping the material accurately. Additionally, the porous structure can result in particle shedding, which contaminates the SiC crystals. Porous graphite is also susceptible to chemical etching and degradation under high temperatures and reactive environments, compromising the integrity of the crucible. Similarly, while Tantalum Carbide (TaC) powders are often used to coat or mix with graphite to enhance its properties, their uniform application and adhesion can be challenging, leading to uneven surfaces and potential contamination.

The Porous Graphite with TaC Coating product effectively overcomes the above challenges by integrating the best properties of both materials:

Enhanced Mechanical Strength: The TaC coating significantly increases the mechanical strength of the porous graphite, making the Porous Graphite with TaC Coating easier to machine and shape without compromising the material's structural integrity.

Reduced Particle Shedding: The TaC coating forms a protective layer over the porous graphite, reducing the likelihood of particle shedding and contamination of the SiC crystals.

Improved Chemical Resistance: TaC is highly resistant to chemical etching and degradation, providing a durable barrier that protects the porous graphite from reactive gases and high-temperature environments.

Thermal Stability and Conductivity: Both graphite and TaC exhibit excellent thermal stability and conductivity. The combination of Porous Graphite with TaC Coating ensures that the crucible maintains uniform temperature distribution, crucial for the defect-free growth of SiC crystals.

Optimized Permeability: The inherent porosity of the graphite allows for efficient gas flow and thermal management, while the TaC coating ensures that this permeability is maintained without compromising the material's integrity.

Semicorex Porous Graphite with TaC Coating represents a significant advancement in materials used for SiC crystal growth. By addressing the mechanical, chemical, and thermal challenges associated with traditional graphite and TaC powders, Porous Graphite with TaC Coating ensures higher quality SiC crystals with fewer defects. The combination of porous graphite's permeability and TaC's protective properties offers a robust solution for high-temperature applications, making it an essential material in the production of advanced semiconductors and electronic devices.