Applications
• Cathode precursor calcination (LiCoO₂, NCM/NCA) at 700–1 000 °C in air or oxygen; crucible keeps melt Li/Co/Ni/Co mix contamination ≤5 ppm .
• Anode pitch carbonisation & graphitisation at 1 000–1 350 °C under N₂; airtight wall blocks O₂ ingress, raising carbon yield to 98 % .
• Spent-battery recycling: secondary smelting of Li/Co/Ni alloy followed by salt-slag separation; crucible survives 300 °C h⁻¹ thermal cycles for >300 melts .
Product Features
• Semiconductor-grade isostatic graphite, ρ ≥1.85 g cm³, ash ≤20 ppm, grain size <5 µm.
• CVD β-SiC or glassy-carbon seal coat (50–200 µm) cuts oxidation weight-gain to <1 mg cm⁻² after 100 h at 1,200 °C .
• Wall-thickness uniformity ±0.2 mm, surface Ra ≤0.3 µm, ensuring ≤5 °C furnace gradient and consistent powder crystallinity .
Technical Advantages
• High thermal conductivity (≈130 W m⁻¹ K⁻¹) shortens calcination cycle by 8–10 %.
• Low CTE (4.2 ppm K⁻¹) resists thermal-shock cracking during rapid ramp (>300 °C h⁻¹).
• Non-wetting to Li/Co/Ni melts, crucible life ≥300 heats vs. 50–80 for alumina, lowering per-use cost 60 % .
Technical Parameters
Datasheet of Harog’s Graphite Crucible for Lithium-Ion Battery
SKU | Bulk density | Grain size | Electrical resistivity | Shore hardness | Flexural strength | Compressive strength | Porosity | Ash content |
g/cm³ ≥ | μm | μΩ·m ≤ | HSD ≥ | MPa | MPa ≥ | % ≤ | ppm ≤ | |
601 | 1.55 | 25 | 14 | 35 | 15 | 35 | 23 | 800 |
602 | 1.72 | 25 | 13 | 45 | 20 | 45 | 20 | 700 |
603 | 1.80 | 25 | 12 | 50 | 30 | 60 | 17 | 600 |
604 | 1.85 | 25 | 12 | 55 | 35 | 70 | 14 | 500 |
605 | 1.90 | 25 | 12 | 60 | 40 | 80 | 10 | 300 |
Harog Technology Edge
• 80,000 m² integrated plant: raw-material purification, precision machining, CVD coating and full metrology under one roof.
• In-house CVD furnace handles jumbo crucibles (Ø 1.2 m) with ±5 µm coating uniformity; Class 1,000 clean-room packing ensures ≤10 particles @ 0.2 µm per charge.
• 4–6 week delivery, 25 % lower COO versus U.S./EU sources; batch certificates include ICP-MS, thermal-shock and oxidation data.
By delivering ultra-pure, coated graphite crucibles that extend lifetime, cut contamination and shorten process cycles, Harog Technology enables cathode/anode producers and recyclers to meet the throughput and purity targets of gigafactory-scale Li-ion battery manufacturing.
