High Density Graphite Rod

High Density Graphite Rod is an advanced carbon material manufactured through multiple controlled processes, including raw material purification, high-pressure molding, high-temperature graphitization, and vacuum impregnation. 

Produced using premium low-ash calcined petroleum coke and high-temperature pitch binder, maintaining an ash content of ≤15ppm to prevent contamination in sensitive processes.

Graphitized at 2800-3000℃, forming a stable crystal structure that ensures excellent thermal shock resistance and high thermal conductivity.

Densified through vacuum resin impregnation and repeated baking cycles, achieving a high bulk density of ≥1.82g/cm³ and minimal internal porosity (≤5%).

Diamond-tool CNC machining achieves customized dimensions with tight tolerances down to ±0.02mm and a smooth surface finish (Ra≤0.8μm).

Custom CNC Machining: We process rods into complex shapes, blocks, cylinders, or specialized components directly based on your CAD or 3D drawings.

Advanced Purification (Optional): Further purification treatments can be applied upon request to achieve even lower impurity levels for specialized electronic applications.

Technical Support & Documentation: Every shipment is accompanied by a comprehensive Material Test Report (MTR), detailing exact density, ash content, and mechanical metrics to support your quality control and compliance requirements.

Semiconductor & Electronics: Components for single-crystal silicon pulling furnaces, graphite heaters, and susceptors.

EDM (Electrical Discharge Machining): High-precision graphite electrodes for mold-making and aerospace component fabrication.

Thermal & Vacuum Furnaces: Heating elements, thermal insulation shields, bolts, nuts, and support fixtures operating up to 3000℃.

Metallurgical & Chemical Engineering: Continuous casting dies, high-purity crucibles, chemical pump components, and heat exchangers.

Mechanical & Automotive: Self-lubricating bearings, mechanical seals, and sliding vanes.

Raw Material Selection：Low ash calcined petroleum coke is selected and processed to reduce impurities before mixing with high-temperature pitch binder.

Molding Process：Isostatic pressing or high-pressure molding ensures uniform density distribution and stable mechanical properties.

Carbonization：1200℃ controlled baking for 15-20 days removes volatile components and improves material structure.

Graphitization：2800-3000℃ ultra-high-temperature treatment reorganizes carbon atoms into graphite crystal structures.

Densification Treatment：Vacuum resin impregnation and repeated baking cycles improve density and reduce internal porosity.

Precision Machining：CNC turning and milling with diamond tools achieve customized dimensions and surface finishing.

Incoming Raw Material Audit: Every lot of low-ash calcined petroleum coke is inspected for purity and particle distribution before mixing.

In-Process Inspection: Intermediate checks are conducted after high-temperature graphitization (2800–3000°C) and vacuum resin impregnation cycles to verify crystal stabilization and densification.

Final Pre-Shipment Verification: Finished CNC-machined rods undergo 100% visual and dimensional screening, backed by a comprehensive Material Test Report (MTR) included with your shipment.