Graphite Crucibles

SIKAIDA Graphite Crucibles are high-performance containers designed for high-temperature melting, casting, and chemical reactions. Made from high-purity graphite, natural flake graphite, silicon carbide, and graphite-silicon carbide composites, they are precision-molded, pressed, sintered, and CNC machined. Available in various sizes, including round, square, and beaker shapes, as well as custom shapes, they feature a smooth, dense surface free of cracks and impurities, offering excellent corrosion resistance and a long service life, maintaining stable performance even in continuous high-temperature environments.

Core Advantages

1. High Temperature Stability: Withstands temperatures up to 2000℃ in air without deformation or melting during long-term use, ensuring reliable operation.

2. Excellent Thermal Conductivity: Rapid and uniform heat transfer effectively improves smelting efficiency and reduces energy consumption.

3. Chemical Inertness: Possesses strong resistance to acid and alkali corrosion, ensuring the purity of the smelted materials.

4. Thermal Shock Resistance: Withstands severe rapid heating and cooling, is not prone to cracking, and extends service life.

5. Customization and Diversity: Offers a full range of sizes and shapes, and can be customized to meet specific customer needs for various special applications.

Materials and Surface Treatment

1. Processing Materials:

Graphite Crucibles uses processing materials including high-purity graphite (purity ≥99%, ash content ≤0.1%), natural flake graphite (possessing excellent thermal conductivity and high temperature resistance), silicon carbide (enhancing the mechanical strength and corrosion resistance of the crucible), and graphite-silicon carbide composites (combining the superior properties of both materials, suitable for demanding applications).

2. Surface Treatment

Surface treatment methods are divided into three types: ordinary treatment is achieved through machining to ensure a smooth surface and precise dimensions; high-temperature treatment uses a high-temperature sintering process to improve the crucible's strength and conductivity; coating treatment uses a special coating to further enhance corrosion resistance and extend service life.

Specifications and Tolerances

SIKAIDA Graphite Crucibles have a dimensional tolerance of ±0.5mm, a surface roughness Ra≤3.2μm, an ash content ≤0.1%, and a maximum operating temperature in air of 2000℃. All indicators meet industry standards.

Production and Quality

We are equipped with professional production equipment, including molding machines, presses, sintering furnaces, and CNC machine tools. We have established a strict quality control system that complies with ISO9001:2015, GB/T, and relevant industry standards. Acceptable drawing formats include STP, STEP, IGS, XT, DXF, DWG, PDF, or samples. Regarding delivery time, samples require 3-4 weeks, while bulk orders are negotiated based on the specific quantity.

Application Areas

Graphite Crucibles are widely used in multiple industries:

1. Metallurgical industry: for smelting and refining steel, non-ferrous metals, and rare earth metals;

2. Foundry industry: for smelting alloy tool steel and non-ferrous metal alloys;

3. Chemical industry: for high-temperature synthesis and chemical reactions;

4. Laboratory analysis: for smelting and testing precious and rare metals;

5. Semiconductor industry: for silicon ingot growth and the preparation of ultra-high purity materials;

6. Glass and ceramics industry: for high-temperature glaze preparation and ceramic sintering.

Frequently Asked Questions

Q1: What is the operating temperature range of Graphite Crucibles?

A1: Our graphite crucibles can be used up to 2000°C in air, and even higher temperatures can be achieved under a protective atmosphere. The specific temperature depends on the operating environment and the type of crucible.

Q2: Can you customize graphite crucibles to special specifications or shapes?

A2: Yes, we provide customization services according to customers' specific needs, including graphite crucibles of different specifications, shapes, and special performance requirements. You only need to provide drawings or samples.

Q3: What are the advantages of graphite crucibles compared to crucibles made of other materials?

A3: Graphite crucibles possess excellent thermal conductivity, high-temperature resistance, chemical stability, and thermal shock resistance, providing a more uniform temperature distribution and a longer service life, making them particularly suitable for high-temperature smelting applications.

Q4: How to properly use and maintain graphite crucibles?

A4: Before use, check the crucible for damage. Avoid sudden temperature changes. After use, clean and dry it promptly. We recommend following our operating instructions to extend the crucible's lifespan.