Core functions:
Carry the negative electrode material powder, preventing contamination and loss of the material at high temperatures
Ensure uniform heat conduction, improving the graphitization efficiency and product consistency
Isolate the internal atmosphere and impurities in the furnace, ensuring the purity of the negative electrode material (fixed carbon ≥ 99.95%)
Withstand extreme temperatures and thermal cycles, maintaining structural stability
Main material types:
Isostatic pressed graphite: Uniform density (±0.02g/cm³), isotropic, suitable for high-precision processing
Molded graphite: Lower cost, suitable for mass production, performance slightly inferior to isostatic pressed graphite
Coated reinforced graphite: Inner wall coated with silicon nitride (Si₃N₄) or boron carbide (B₄C), reduces material adhesion and extends lifespan
Integral molding structure
No joint seam design: One-time processing and molding, avoiding material leakage and contamination at the joint area under high temperature
Precise size control: Tolerance ±0.05mm, meeting the precise positioning requirements of automated production lines
Ribs design: Enhancing thermal shock resistance and deformation resistance, extending cycle service life (>100 times)
Air flow optimization design
Side guide holes: Facilitate uniform air circulation within the furnace, reducing local temperature differences (≤ ±5℃)
Step-shaped lid: Enhance sealing performance, prevent impurities from entering while allowing gas to be discharged
Groove positioning system: Ensure stability during stacking, suitable for efficient production in multi-layer kilns
Customized structural plan
| Structure Type | Application Scenarios | Advantages |
|---|---|---|
| Square Box Body | Roller kiln, pusher kiln | 20% higher space utilization, compatible with automatic loading and unloading |
| Partitioned Graphite Box | Small-batch & multi-variety production | Prevent mixing of materials from different batches and improve product consistency |
| Combined Graphite Box | Large-scale production | 20% cost reduction; damaged parts can be replaced separately |
| Lidded & Sealed Type | Processes requiring high material purity | Isolate external contamination and enhance material purity |
Core performance features and technical advantages
Extremely high heat resistance and thermal stability
Can withstand a long-term temperature of 2800℃, and a short-term temperature of up to 3200℃, fully meeting the requirements of the negative electrode graphitization process
Low thermal expansion coefficient (≤ 3.8 × 10⁻⁶/℃), not prone to cracking under rapid heating and cooling (temperature difference of 1000℃/h)
Excellent thermal shock resistance: Can withstand ≥ 50 cycles of 1000℃ → room temperature without damage
Core performance features and technical advantages
Outstanding chemical inertness and purity control
Strong chemical stability: Does not react with negative electrode materials (such as graphite, asphalt) at high temperatures
Low impurity release: Ash content ≤ 20 ppm, ensuring the purity of the negative electrode material and improving the initial efficiency of the battery (+1.5%)
Antioxidant coating: Adds carbonized tantalum (TaC) or silicon nitride coating, reducing the oxidation rate by 50% below 1800℃
Our Service
Developing solutions specifically for lithium battery anode materials
01
One-on-one pre-sales technical consultation and professional selection
We have a team of over 10 years of experience in graphite material application. For different working conditions such as positive and negative electrode sintering / graphitization of lithium batteries, electric arc furnace steelmaking, liquid flow energy storage batteries, and high-temperature heat treatment in vacuum furnaces, as well as different kiln types, temperature ranges, atmosphere environments, and purity standards, we provide free one-on-one selection guidance. Based on the customer's production line parameters, the number of recycling uses, and cost targets, we precisely recommend suitable materials, structures, and surface coating solutions, avoiding selection errors from the source and reducing overall usage costs. At the same time, we provide process benchmarking, technical parameter comparisons, and adaptation suggestions for working conditions.
02
Full-dimensional personalized customization service
Supports full-process customization of non-standard sizes, irregular structures, and functional designs: Can conduct reverse development based on customer drawings and samples, customizing square / partitioned / combined / covered-sealed graphite boxes, graphite bipolar plates with flow channels, irregular graphite rings, special-threaded graphite electrodes, etc.; Supports processing requirements such as drilling holes, reinforcing ribs, flow channels, internal partition compartments, SiC/PYC/BN wear-resistant and anti-corrosion coatings. From structural design, process optimization, small-batch prototyping to mass production, one-stop implementation is provided to quickly respond to customization needs.
03
Full-process quality control + Complete test report support
From raw material storage, molding, high-temperature graphitization, precision machining, surface treatment to product delivery, all process closed-loop quality inspection is carried out. A complete set of physical and chemical testing equipment is equipped, which can issue self-inspection reports such as ash content, impurity content (GDMS), volume density, mechanical strength, thermal expansion coefficient, resistivity, thermal shock stability, etc., as well as international compliance certificates such as COA, SGS, RoHS. Each batch of products can be traced back, strictly meeting the high-cleanliness and high-performance entry standards of lithium battery, semiconductor, and high-end metallurgy industries.
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