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SIC noir 325 mesh pour creuset en carbure de silicium

$900.00 /MT

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Les creusets en carbure de silicium (SiC) offrent plusieurs avantages par rapport aux matériaux traditionnels comme le graphite, l’argile-graphite ou le quartz, notamment dans les environnements réactifs et à haute température. Voici les principaux avantages de l’utilisation  de creusets en carbure de silicium :

1. Conductivité thermique élevée

  • Le SiC présente une excellente conductivité thermique (≈120 W/m·K), assurant un chauffage rapide et uniforme.

  • Réduit les contraintes thermiques et les fissures par rapport à des matériaux comme l’alumine ou le quartz.

2. Résistance exceptionnelle aux chocs thermiques

  • Le SiC peut résister à des changements de température rapides sans se fissurer, ce qui le rend idéal pour les processus impliquant un chauffage ou un refroidissement soudain.

3. Stabilité à haute température

  • Fonctionne efficacement à des températures allant jusqu’à  1600°C  (dans des atmosphères inertes/réductrices) et jusqu’à  1400°C  dans des conditions oxydantes.

  • Surpasse le graphite (qui s’oxyde au-dessus de 600°C) et l’alumine (se ramollit à haute température).

4. Résistance chimique supérieure

  • Résiste à la corrosion causée par les métaux en fusion (Al, Cu, Zn), les sels et les scories.

  • Plus durable que le graphite lorsqu’il est exposé à des métaux réactifs comme l’aluminium ou le silicium.

5. Résistance mécanique et durabilité

  • La dureté élevée (~ 9,5 Mohs) et la résistance à la compression réduisent l’usure et la déformation.

  • Durée de vie plus longue que les creusets en argile-graphite ou en quartz.

6. Résistance à l’oxydation

  • Forme une couche protectrice de SiO₂ dans l’air, empêchant une dégradation rapide (contrairement au graphite, qui s’érode).

7. Surface non mouillante

  • Minimise l’adhérence des métaux en fusion, permettant un coulage et un nettoyage plus faciles.

8. Efficacité énergétique

  • Un transfert de chaleur plus rapide réduit la consommation d’énergie dans les applications de fusion.

ANALYSE CHIMIQUE TYPIQUE

PROPRIÉTÉS PHYSIQUES TYPIQUES

SiC

≥ 98%

Dureté:

Mohs : 9,15

SiO2

≤1%

Point de fusion:

Sublimes at 2250 ℃

H2O3

≤ 0,5 %

Température maximale de service :

1900℃

Fe2O3

≤ 0,3 %

Densité spécifique :

3,2-3,45 g/cm3

FC

≤ 0,3 %

Masse volumique apparente (LPD) :

1,2-1,6 g/cm3

Contenu magnétique

≤ 0,02 %

Couleur:

Noir

 

 

Forme des particules :

Hexagonal

Applications des creusets en SiC :

  • Fusion et coulée de métaux  (Al, Cu, Zn, métaux précieux)

  • Traitement des semi-conducteurs  (croissance de cristaux de Si et GaAs)

  • Production de verre et de céramique

  • Réactions chimiques à haute température

 

Les creusets en SiC sont idéaux pour  les applications haute température et hautes performances  où la durabilité, la résistance aux chocs thermiques et la stabilité chimique sont essentielles. Ils surpassent les matériaux de creuset traditionnels dans les environnements difficiles, mais leur coût initial est plus élevé.

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Notre capacité de production annuelle est actuellement d’environ 30 000 tonnes et nos ventes dépassent les 100 millions. Notre entreprise dispose d’un système de gestion scientifique et d’un système de contrôle qualité performant, avec des équipements de test variés tels que des tamis Omec, des tamis à claquage et des microscopes.

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