Black Silicon Carbide for Industrial Ceramics

1. Black silicon carbide introduction

2. Core Physical & Chemical Properties

• Mohs hardness: 9.2
• Melting point: ≥2200℃
• Long-term service temp: 1300–1600℃
• Acid & alkali resistance, low thermal expansion, high thermal conductivity
• High toughness, anti-oxidation, non-deformation at high temperature

3. Common Particle Sizes

• 200–320#: Wear-resistant structural ceramics, kiln furniture
• 400–600#: Most widely used for ceramic body reinforcement, densification & coloring
• 800–1000#: High-density special ceramics, fine industrial ceramic parts

4. Black Silicon Carbide Functions in Industrial Ceramics

1. Improve mechanical strength & toughness, prevent cracking and chipping
2. Super wear resistance, extend service life of ceramic parts
3. Outstanding high temperature resistance & thermal shock stability
4. Resist acid, alkali and molten medium corrosion
5. Densify ceramic structure, reduce water absorption & permeability
6. Stable black color at high temperature, uniform coloring
7. Optimize thermal conductivity for heat-conductive ceramic components

5. Main Application Products

• Kiln furniture: SiC shelf plates, saggers, kiln supports
• Wear-resistant ceramics: liner plates, ceramic pipes, anti-wear special-shaped parts
• Anti-corrosion chemical ceramics, high-temperature crucibles
• Flue gas / dedusting industrial ceramic accessories
• High-strength structural industrial ceramic parts

6. Difference: Black SiC vs Green SiC

• Black SiC: High toughness, cost-effective, first choice for general industrial ceramics, refractory & wear-resistant ceramics
• Green SiC: Higher purity & hardness, mainly for polishing, electronic ceramics & high-end fine ceramics

7. Formula & Adding Ratio

• Addition ratio: 10%–35% (adjusted by ceramic formula)
• Firing temperature: 1280℃–1380℃
• Mixing: dry/wet mixing with clay, bauxite and other ceramic raw materials