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SIC negro de malla 325 para crisol de carburo de silicio

$900.00 /MT

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Los crisoles de carburo de silicio (SiC) ofrecen varias ventajas sobre los materiales de crisol tradicionales, como el grafito, el grafito arcilloso o el cuarzo, especialmente en entornos reactivos y de alta temperatura. Estas son las principales ventajas de usar  crisoles de carburo de silicio :

1. Alta conductividad térmica

  • El SiC tiene una excelente conductividad térmica (≈120 W/m·K), lo que garantiza un calentamiento rápido y uniforme.

  • Reduce el estrés térmico y el agrietamiento en comparación con materiales como la alúmina o el cuarzo.

2. Resistencia excepcional al choque térmico

  • El SiC puede soportar cambios rápidos de temperatura sin agrietarse, lo que lo hace ideal para procesos que implican calentamiento o enfriamiento repentino.

3. Estabilidad a altas temperaturas

  • Funciona eficazmente a temperaturas de hasta  1600 °C  (en atmósferas inertes/reductoras) y hasta  1400 °C  en condiciones oxidantes.

  • Supera al grafito (que se oxida por encima de los 600 °C) y a la alúmina (se ablanda a altas temperaturas).

4. Resistencia química superior

  • Resiste la corrosión de metales fundidos (Al, Cu, Zn), sales y escorias.

  • Más duradero que el grafito cuando se expone a metales reactivos como el aluminio o el silicio.

5. Resistencia mecánica y durabilidad

  • La alta dureza (~9,5 Mohs) y la resistencia a la compresión reducen el desgaste y la deformación.

  • Mayor vida útil que los crisoles de arcilla-grafito o de cuarzo.

6. Resistencia a la oxidación

  • Forma una capa protectora de SiO₂ en el aire, evitando una degradación rápida (a diferencia del grafito, que se erosiona).

7. Superficie no humectante

  • Minimiza la adherencia de metales fundidos, lo que permite un vertido y una limpieza más fáciles.

8. Eficiencia energética

  • Una transferencia de calor más rápida reduce el consumo de energía en aplicaciones de fusión.

ANÁLISIS QUÍMICO TÍPICO

PROPIEDADES FÍSICAS TÍPICAS

Sic

≥98%

Dureza:

Escala de Mohs: 9,15

SiO2

≤1%

Punto de fusión:

Sublima a 2250 ℃

H2O3

≤0,5%

Temperatura máxima de servicio:

1900℃

Fe2O3

≤0,3%

Peso específico:

3,2-3,45 g/cm3

FC

≤0,3%

Densidad aparente (LPD):

1,2-1,6 g/cm3

Contenido magnético

≤0,02%

Color:

Negro

 

 

Forma de la partícula:

Hexagonal

Aplicaciones de los crisoles de SiC:

  • Fundición y fundición de metales  (Al, Cu, Zn, metales preciosos)

  • Procesamiento de semiconductores  (crecimiento de cristales de Si y GaAs)

  • Producción de vidrio y cerámica

  • Reacciones químicas de alta temperatura

 

Los crisoles de SiC son ideales para  aplicaciones de alta temperatura y alto rendimiento  donde la durabilidad, la resistencia al choque térmico y la estabilidad química son cruciales. Superan a los crisoles tradicionales en entornos hostiles, pero su costo inicial es mayor.

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