Overview
High purity graphite sheets are manufactured through the exfoliation and compression of natural or synthetic graphite, achieving a carbon content typically exceeding 99.9%. These sheets exhibit unique anisotropic properties, allowing superior in-plane thermal conductivity (up to 1700 W/m·K) while maintaining electrical insulation perpendicular to the plane. The material's flexibility and machinability enable customized shapes for diverse industrial applications. Unlike traditional graphite blocks, the sheet form factor provides lightweight solutions for thermal management systems, particularly in space-constrained environments like electronic devices and aerospace components.
Physical and Chemical Properties
High purity graphite sheets demonstrate exceptional thermal stability, maintaining structural integrity from cryogenic temperatures up to 3000°C in inert atmospheres. Their low coefficient of thermal expansion (CTE) minimizes warping under thermal cycling, a critical feature for semiconductor manufacturing equipment. Chemically, the material resists corrosion from most acids, alkalis, and organic solvents, though prolonged exposure to strong oxidizers should be avoided. The layered crystal structure provides self-lubricating properties with a friction coefficient of 0.1-0.3, making it suitable for dynamic sealing applications.
Main Applications
In electronics, these sheets serve as heat spreaders in smartphones, LED lighting, and power modules, often replacing metal heatsinks due to their lighter weight and better EMI shielding properties. The energy sector utilizes them as bipolar plates in fuel cells and conductive substrates for lithium-ion battery anodes. Industrial applications include high-temperature gaskets for chemical processing equipment, furnace insulation components, and crucible linings for metal casting. Emerging uses encompass flexible heating elements and thermal interface materials for 5G infrastructure.
Safety and Storage
While bulk graphite sheets pose minimal health risks, airborne dust from machining operations requires proper ventilation or respiratory protection (NIOSH N95 or equivalent). Fire prevention measures are essential when handling fine graphite particles, which may form explosive mixtures in air. Storage recommendations include keeping sheets in original polyethylene packaging to prevent moisture absorption, which can degrade electrical properties. Stacking should be limited to 50 sheets maximum to prevent edge deformation. For long-term storage (>1 year), nitrogen-purged containers are advised for premium-grade materials.
B2B Procurement Guide
Key specifications to verify include ash content (<0.1% for electronic applications), tensile strength (10-50 MPa depending on binder systems), and through-plane resistivity (typically 500-1000 μΩ·m). ISO 9001-certified suppliers should provide material traceability documents and batch-specific property test reports. Lead times vary from 2 weeks for standard grades to 8 weeks for custom-calendered sheets with specific thickness tolerances (±5%). Bulk orders (≥100m²) typically qualify for 15-30% discounts. For prototyping, request sample kits containing multiple thicknesses to evaluate performance in actual operating conditions.
Related Manufacturers
- 主营：石墨卷材、高温石墨、碳石墨板、石墨复合板、高纯石墨垫片、柔性石墨板、石墨尼龙卷、电镀石墨板、高纯石墨板、柔性石墨带、柔性石墨纸、石墨纸定制、超薄石墨纸、钢膨胀石墨、石墨板定制、耐酸碱石墨板、包边散热石墨、铝材挤压石墨、耐腐蚀石墨板、石墨板、石墨纸、石墨带、柔性石墨盘根、石墨盘根、聚苯保温板
- 主营：石墨板、石墨电极、石墨块、石墨匣钵、石墨模具、石墨碳毡、石墨纸、石墨棒、石墨制品
- 主营：石墨电极、石墨匣钵、石墨舟皿、石墨坩埚、高纯石墨管
- 主营：蛭石、海泡石、矿物纤维、石墨颗粒、防火涂料、漂珠、石油焦、云母粉、火山球、重钙、滑石粉、轮胎粉、钾长石、叶腊石、氧化铝、碳酸钙
- 主营：fto靶材、钐靶材、硼化锆、高纯石墨片、硒靶材、铝靶材、钆靶材、铽靶材、氟化镁、钇靶材、钼靶材、铬靶材、镉靶材、钽靶材、硒化锌、氟化镱、砷化镓、硒化锑、碲化镉、镍靶材、钨靶材、铑靶材、铒靶材、铪靶材、锑靶材、碲粉末
- 主营：密封垫片、无石棉密封垫片、金属缠绕垫片、齿型垫片、八角垫片、四氟垫片、石墨垫片、无石棉密封材料
- 主营：石墨电极、石墨块、石墨转子、石墨套筒、电火花石墨、石墨垫块、石墨轴承、石墨制品、石墨模具、石墨坩埚、石墨环、定制石墨电极、石墨压头、石墨倒模杯、石墨吹气管、石墨水口座、石墨板、石墨导电杆、石墨集束轮、高纯度石墨坩埚、石墨精密配件、真空炉石墨配件、石墨油槽、钻头模具
- 主营：鳞片石墨、干电池、防腐涂料
- 主营：石墨制品、石墨坩埚、石墨板、石墨棒、石墨圆坩埚、石墨涂油辊、耐高温石墨、导电石墨板、抗氧化石墨板、异形石墨坩埚、高纯度石墨板
- 主营：镀膜材料、蒸发颗粒、三氧化钨、高纯铟丝、高纯铝靶材、高纯钒靶材、高纯钛颗粒、高纯铌靶材、高纯硅靶材、高纯铬颗粒、高纯钽靶材、高纯锗靶材、高纯铪靶材、高纯铬靶材、高纯锰靶材、高纯铜颗粒、高纯硫化锌、高纯钨靶材、高纯锆靶材、氧化镨粉末、氧化铒粉末、三氧化二铁、三氧化二铟、氟化钙晶体
- 主营：复合板、series500、密封件、3510垫片、ptfe垫片、包覆垫片、石墨垫片、焊接垫片、板状垫片、四氟垫片、密封垫、橡胶板、thermblock、series1000、valqua6500、valqua6503、改性ptfe、valquagf300、valqua7gp66、valquamf300、valquavf-35e、valqua7gs62a、valqua7gs64n、valqua7gs66a、tombono.1200
- 主营：石墨棒、石墨板、石墨电极、高纯石墨、石墨坩埚、石墨异形件、石墨焊接块
- 主营：高温胶、保护膜、粘胶带、散热片、石墨片、石墨粉、锂电池、面胶带、电池膜、失粘膜、高温膜、硅胶带、切割膜、解粘胶、解粘膜、黑白膜、固化膜、连接器、挂钩胶、冲压板、单双灯、泡棉胶、抗酸膜、铝塑膜、定位膜
- 主营：石油焦、蛭石、云母、石墨颗粒、膨胀石墨、海泡石、矿物纤维、漂珠、重晶石、氧化铝、增碳剂、橡胶颗粒、膨润土、高岭土、钾长石、滑石粉、轮胎粉、重钙、轻钙、防火涂料、硅藻土
- 主营：接地线盘、铁塔防雷接地极、光伏线路防雷带、石墨扁带、石墨接地线、石墨接地极、铜包钢圆钢、铜包钢接地棒、离子接地极、铜包钢扁钢