Overview
High purity graphite refers to synthetic graphite with carbon content exceeding 99.9%, produced through advanced purification processes that remove metallic impurities. Unlike natural graphite, it offers consistent properties critical for industrial applications. The material is manufactured through high-temperature treatment (up to 3000°C) of petroleum coke or pitch coke, followed by halogen purification to achieve ultra-low ash content (<100 ppm). This makes it indispensable for semiconductor, photovoltaic, and nuclear industries where contamination risks must be minimized.
Physical and Chemical Properties
With a layered hexagonal crystal structure, high purity graphite exhibits anisotropic properties. Its in-plane thermal conductivity reaches 1500-2000 W/mK, while electrical resistivity can be as low as 5-10 μΩ·m parallel to the basal planes. The material maintains structural integrity up to 3000°C in inert atmospheres and shows exceptional chemical resistance to most acids, alkalis, and organic solvents. Its low coefficient of thermal expansion (CTE) and self-lubricating properties make it valuable for high-precision applications.
Main Applications
In metallurgy, high purity graphite serves as electrodes for electric arc furnaces and crucibles for silicon crystal growth. The semiconductor industry uses it for wafer processing components due to its contamination-free characteristics. Other key uses include moderator rods in nuclear reactors, bipolar plates in fuel cells, and thermal management components in satellites. Emerging applications include lithium-ion battery anodes and graphene production feedstock, driving demand growth at 8-12% annually.
Safety and Storage
While non-toxic, graphite dust poses inhalation risks (PEL 15 mg/m³ total dust). Use local exhaust ventilation and NIOSH-approved respirators during machining. Static electricity buildup requires grounding equipment when handling powders. Store away from strong oxidizers (nitrates, peroxides) to prevent ignition. Bulk material should be kept in moisture-proof packaging to prevent adsorption of gases that could affect electrical properties. Shelf life is effectively unlimited under proper conditions.
B2B Procurement Guide
Technical buyers should specify: 1) Carbon content (99.9-99.999%), 2) Particle size/distribution (for powders), 3) Flexural strength (for molded parts, typically 20-100 MPa), and 4) CTE requirements (varies by orientation). For large orders, request batch test certificates including ash content, sulfur levels, and trace metal analysis. Lead times for custom-machined components can exceed 12 weeks. Consider ISO 9001-certified suppliers with nuclear/space industry experience for critical applications.
Related Manufacturers
- 主营：石墨块、石墨板、高纯石墨管、电极制品
- 主营：石墨接地模块、铠装石墨引下线、石墨线、石墨接地极、石墨柔性模块、石墨扁带、降阻剂、放热焊粉
- 主营：石墨板
- 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：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：氧化铁粉、染色彩砂、彩色玻璃砂、石墨、煅烧高岭土、水洗高岭土、赤铁粉、硅藻土、木粉、硬脂酸、石英砂、硫化铁、火山石粉、氧化锌、红土、黄土、滑石粉、配重铁砂、地坪砂、云母砂、五彩石、活性锌
- 主营：棕刚玉 白刚玉、氧化铁颜料、云母、石墨烯粉、复合岩片、金刚砂耐磨地坪材料、鹅卵石雨花石、金刚砂、夜光石、免洗树脂水洗石开通即、棕刚玉砂 微粉、硫化铁、煅烧彩砂、石英砂、硅微粉 石英粉、碳酸钙、玻璃微珠、海泡石纤维、玻璃微粉、树脂砂 悬浮砂、反射隔热粉、碳粉、负氧离子液
- 主营：氢氧化钙、石英砂、石英粉、石墨粉、耐高温耐磨材料、耐高温涂料、硅微粉、硅酸钾、玻璃纤维布、水玻璃、辉绿岩铸石粉、环氧树脂、环氧树脂固化剂、活性炭、消石灰、钾水玻璃、玻纤布、泡花碱、辉绿岩粉、耐酸水泥、玻璃丝布
- 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：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
- 主营：轻质碳酸钙、4A沸石粉、膨润土、煅烧高岭土、水洗高岭土、高铝耐火粉、重晶石粉、配重铁粉 铁砂、氢氧化钙、红陶土 黄陶土、木粉、麦饭石粉、沸石粉、滑石粉、负离子粉、硅藻土、白云石粉、玻璃鳞片、蓝晶石粉
- 主营：海泡石粉、海泡石纤维、凹凸棒土、厂家批发石墨粉、远红外陶瓷粉、珍珠岩、铝矾土粉、红土黄土粉、白黄色粘土粉、空心玻璃微珠、熟石灰、氧化钙、铁粉铁砂、S95矿粉、粘土球、氧化铁颜料、轻质碳酸钙、硅藻土、白炭黑、膨润土、火山石粉、伊利石粉、叶蜡石粉
- 主营：石墨、石墨颗粒、石墨粉、石油焦、碳素、冶金焦
- 主营：保护膜、粘胶带、散热片、高温胶、高温膜、石墨片、石墨粉、锂电池、面胶带、电池膜、失粘膜、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：麦饭石粉、滑石粉、沸石粉、石墨、高岭土、氧化钙、膨润土、白云石粉、橡胶粉、石英粉、硅微粉、碳酸钙、硅藻土、抗菌粉、氢氧化钙、消石灰、陶土、活性白土、金刚砂、木粉、磁粉、海泡石粉、二氧化硅、负离子粉
- 主营：中华麦饭石、石英砂、石英粉、石墨、高岭土、水洗无烟煤、煤粉、营养土园艺绿化土、膨润土、硅藻土、活性白土、远红外粉、电气石、火山石、沸石、粉煤灰、矿粉、炭黑、彩砂、活性炭、水处理磁粉、重晶石粉、碳酸钙、重钙轻钙、鹅卵石