XRD Graphite Co., Ltd. (hereinafter referred to as “Xinruida”) is a high-tech enterprise specializing in the R&D and precision processing of high-purity graphite materials. Equipped with advanced equipment clusters and a stringent quality management system, the company’s flagship products are high-purity graphite rods (purity ≥99.9%) manufactured through CNC machining, turning, milling, and other processes. The following sections provide a detailed analysis of product categories, processing workflows, technical advantages, and industry applications.
I. Core Product Categories of Graphite Rods
High-purity graphite, known as the “black gold” of industrial applications due to its exceptional electrical conductivity, high-temperature resistance, and chemical stability, serves as the foundation for Xinruida’s three core product lines:
1. High-Precision Conductive Graphite Rods
- Material Properties:
- Purity ≥99.99%, ash content <50 ppm;
- Bulk density ≥1.85 g/cm³, flexural strength >40 MPa;
- Resistivity <12 μΩ·m (at room temperature), withstands temperatures up to 3000°C.
- Key Applications:
- Semiconductor Manufacturing: Used in thermal field components (e.g., heaters, insulation tubes) for monocrystalline silicon growth furnaces, ensuring contamination-free silicon melts;
- Photovoltaic Industry: Electrode materials for polysilicon ingot furnaces, doubling service life compared to traditional materials;
- Lithium Battery Production: Sintering molds for anode materials, resistant to high-temperature deformation and impurity migration.
2. Corrosion-Resistant Graphite Rods
- Material Properties:
- Produced via isostatic pressing, density ≥1.92 g/cm³;
- Porosity <15%, compressive strength >80 MPa;
- Acid/alkali resistance: Stable in pH 1–14 liquid environments.
- Key Applications:
- Chemical Equipment: Seals for reactors, anodes for electrolytic cells, replacing traditional metal components;
- Environmental Engineering: Acid-resistant connectors for exhaust gas treatment systems;
- Nuclear Industry: Base material for neutron moderators, combining radiation and corrosion resistance.
3. Customized Special-Shaped Graphite Rods
- Machining Capabilities:
- Complex geometries supported;
- Minimum machining tolerance ±0.005 mm, surface roughness Ra ≤0.8 μm.
- Key Applications:
- Aerospace: Rocket engine nozzle throats, resistant to ultra-high-temperature gas erosion;
- Mechanical Molds: Glass-forming molds with uniform thermal conductivity and >100,000-cycle lifespan;
- Medical Devices: CT scanner slip rings, enabling oil-free lubrication and low friction.
II. End-to-End Processing Technology and Equipment
Xinruida adopts an integrated production model of “high-purity raw materials + precision machining + full-process QC”:
1. Raw Material Screening and Pre-Treatment
- Material Standards: Isostatic graphite blocks derived from petroleum or pitch coke graphitized at >2800°C;
- Pre-Treatment: Ultrasonic cleaning for impurity removal, X-ray inspection for internal cracks and porosity.
2. CNC Machining for Precision Forming
- Equipment:
- High-precision CNC machines;
- Diamond-coated graphite tools (spindle speed ≥20,000 rpm).
- Advantages:
- Complex structures formed efficiently with minimized clamping errors;
- Tolerance control: Radial ±0.01 mm, axial ±0.005 mm;
- Efficiency: <30 minutes per custom-shaped component.
3. Conventional Lathe (Manual Turning) for Rough Machining
- Applications: Initial shaping of cylindrical or stepped shafts;
- Cost Efficiency: Removes 80% of excess material, reducing CNC tool wear.
4. Milling for Fine Detailing
- Equipment:
- Vertical milling machineswith high-speed electric spindles;
- Dedicated dust extraction systems to control graphite particles.
- Key Processes:
- Surface milling for heat sinks and slots;
- Contour milling for curved surfaces and grooves;
- Drilling accuracy: Hole diameter tolerance ±0.02 mm, positional error <0.03 mm.
5. Surface Treatment and Quality Inspection
- Surface Treatments:
- Precision grinding with diamond wheels (surface roughness Ra ≤0.4 μm);
- Functional coatings: Silicon carbide (SiC) coating (50–100 μm thickness) for oxidation resistance.
- QC Systems:
- CMM (Coordinate Measuring Machine): Full-dimensional scanning against 3D models;
- Resistivity testing for electrical performance verification;
- Metallographic analysis for pore distribution and grain structure evaluation.
III. Technical Advantages and Supply Chain Capabilities
1. Industry-Leading Tolerance Control
- Mass production tolerances: ±0.01 mm (standard), ±0.005 mm (high-precision);
- SPC (Statistical Process Control) for real-time machining monitoring.
2. Quality Consistency Assurance
- Raw material traceability: Unique batch codes for full lifecycle tracking;
- Environmental controls: Temperature (22±1°C), humidity <40% to minimize thermal expansion.
3. High-Volume Production Capacity
- Production Scale:
- Automated lines: 10 CNC machines + 20 lathes + 5 milling machines;
- Monthly output: 150,000 standard parts + 50,000 custom parts.
- Supply Chain Management:
- Long-term agreements with graphite suppliers for stable raw material supply;
- JIT (Just-in-Time) production, reducing lead times to 7–15 days.
IV. Industry Case Studies and Client Feedback
1. Semiconductor Industry Collaboration
- Client Needs: Custom thermal field components for monocrystal furnaces (>2800°C, zero impurity release);
- Solution: Xinruida delivered 99.995%-purity graphite rods with SiC coating, achieving a 12-month lifespan;
- Client Feedback: “Product yield increased by 3%, annual maintenance costs reduced by $2 million.”
2. Breakthrough in New Energy Sector
- Project Background: A lithium battery manufacturer sought graphite molds to replace metal counterparts;
- Results: Xinruida’s anode molds achieved 80,000 cycles (vs. 20,000 for metal), boosting client capacity by 40%.
3. Aerospace Certification
- Partner: A research institute under China Aerospace Science and Technology Corporation;
- Application: Rocket engine nozzle throat liners;
- Performance Test: Withstood 3200°C gas flow for 120 seconds without structural failure.
V. Future Development Roadmap
Xinruida plans to expand in the following areas:
- Material Innovation: Graphene-reinforced composite graphite for enhanced mechanical properties;
- Smart Manufacturing: AI-powered visual inspection systems for automatic error correction;
- Sustainable Practices: Graphite dust recycling to reduce carbon emissions.
