High-purity Graphite Sheet

High-purity graphite sheet is made from natural flake graphite with a carbon content of ≥ 99%, through high-temperature purification and rolling forming processes. Relying on the layered crystal structure of graphite, it combines excellent chemical inertness, dense sealing, and stable thermal conductivity, making it a key foundational material for industrial sealing, anti-corrosion, and thermal conductivity scenarios.

Products support personalized customization.

Ultra high purity performance: Carbon content ≥ 99%, extremely low impurity content, ensuring chemical stability, no chemical reaction in strong acids, strong bases, and organic solvents, no swelling or deterioration phenomenon.

Wide range temperature resistance: ​High-purity graphite sheet can work stably for a long time at -200~300 ℃, and can withstand high temperatures of 350 ℃ in the short term. Its physical properties do not significantly deteriorate under alternating high and low temperature environments.

Precision sealing characteristics: With a fine texture and slight elasticity, it can tightly adhere to the sealing surface under pressure, achieving a leakage rate of ≤ 0.01MPa, and adapting to the static sealing requirements of various flanges and valves.

Efficient thermal and electrical conductivity: The room temperature thermal conductivity reaches 150-200W/(m · K), with excellent electrical conductivity, and can simultaneously achieve sealing and heat/current conduction functions.

Easy to process customization: It has good flexibility and cutting ability, and can be processed into gaskets, liners, shaped parts, etc. according to needs. It can be stably produced within the conventional thickness range of 0.1-5mm.

Mehanical Properties: High strength, excellent thermal shock resistance, and easy for precision machining.

 

Chemical anti-corrosion sealing: 

 Used as a static sealing gasket for chemical reaction vessels, pipeline flanges, and storage tanks to resist corrosion from acidic and alkaline media and ensure leak-free operation.

New energy equipment:

As a fuel cell bipolar plate and lithium battery thermal pad, high-purity graphite sheet combines conductivity, thermal conductivity, and anti-corrosion performance to improve energy conversion efficiency.

 

Metallurgy and Machinery:

 Suitable for sealing temperature measuring elements in metallurgical furnaces, lubricating liners for precision machine tools, withstanding high temperatures and mechanical friction, and extending equipment life.

 

Laboratory and Environmental Protection:

Manufacturing laboratory anti-corrosion vessel liners and sealing components for exhaust gas treatment equipment to meet stability requirements in harsh environments.

1. Full-Process Control

(1) Process Control

Calendering precision: ±0.01mm; Slitting error: ≤0.5mm, ensuring high dimensional accuracy of products. Advanced production equipment and automated control systems are adopted to achieve precise control over the entire production process.

(2) Abnormity Management

A 4-hour Root Cause Analysis (RCA) mechanism is established to respond to quality issues rapidly and take timely corrective measures. All abnormal situations are recorded and analyzed in detail, with lessons summarized to prevent the recurrence of similar problems.

(3) Continuous Improvement

Annual customer complaint rate: ＜0.3%. We continuously optimize product quality and service standards based on customer feedback. Regular quality improvement activities are carried out to refine production processes and enhance product performance and quality stability.

2. Safeguard Measures

(1) 12-Hour Response Mechanism

A dedicated 12-hour customer response mechanism is in place to ensure timely resolution of customer inquiries and issues, elevating customer satisfaction. Whenever and wherever customers submit feedback, our team will provide a formal reply and take corresponding solutions within 12 hours.

(2) Lifetime Cost-Based Maintenance

We offer lifetime cost-based maintenance services for all products, eliminating customers' post-purchase concerns. For any problems occurring during product usage, we provide repair, replacement and other supporting services at cost price to fully safeguard customers' interests.

(3) Full-Lifecycle Archive Management

A comprehensive product full-lifecycle archive management system is established, recording all details of products from R&D, production to on-site application. This system enables complete product quality traceability, providing strong support for continuous quality improvement and personalized customer service.

3. After-Sales Service - Visualized Service

(1) Customer Demand Analysis & In-Depth Exploration

We start with attentive listening. Through professional one-on-one interviews and targeted market research, we accurately identify, analyze and define customers' core needs and potential expectations, ensuring high alignment between project objectives and commercial value.

(2) Customized Solution Design & Engineering Development

Based on in-depth demand analysis, our expert team conducts multi-dimensional solution conception, feasibility assessment and detailed design, and delivers a complete technical blueprint, clear implementation path and detailed cost budget to provide customers with the optimal customized solutions.

(3) Prototype Sample Production & Verification Testing

We convert designed solutions into physical prototypes or functional samples. A series of rigorous performance tests, user feedback collection and design iterations are implemented to ensure that products meet predetermined objectives in terms of function, appearance and user experience.

(4) Medium-Scale Trial Production & Process Optimization

Upon customer confirmation of samples, we initiate small to medium-scale trial production. The core of this stage is to polish production processes, establish a stable supply chain and standardized quality control system, laying a solid foundation for large-scale mass production.

(5) Large-Scale Mass Production & Lean Delivery

Relying on our mature supply chain and efficient production management system, we carry out large-scale, standardized mass production with full-process real-time quality monitoring, ensuring on-time delivery of high-quality products with high efficiency.

(6) Full-Lifecycle On-Site Support & Sustained Service

We provide comprehensive on-site support throughout the entire product lifecycle, including on-site installation and commissioning, professional technical training, operational and maintenance guidance, and rapid emergency response services, ensuring worry-free product usage for customers and creating long-term sustainable value.

Q1: What types of graphite sheets do you mainly produce?

A1: We mainly produce three core categories:

High-purity graphite sheets (for high-temperature processing and semiconductor fields)

Isostatic graphite sheets (isotropic performance, for precision molds and Electrical Discharge Machining (EDM))

Flexible graphite sheets (for sealing applications and thermal interface materials)

Which application field are you mainly concerned about?

Q2: What are the standard density and purity specifications?

A2: Our standard specifications are as follows:

Density: 1.70-1.85g/cm³

Purity: ≥99.99%

Density and purity are interrelated key indicators. High density usually means a more compact internal structure, bringing higher mechanical strength, excellent thermal and electrical conductivity. High purity ensures no impurity gas is generated under extreme high temperatures, effectively extending the product service life. We can recommend the optimal balance of density and purity according to your specific process parameters and application scenarios.

Q3: What is the maximum operating temperature? Is it the same in air and in a vacuum/inert atmosphere?

A3: The maximum operating temperature varies significantly in different environments:

In air: Graphite starts to oxidize at above approximately 350℃, so special coating protection is required for high-temperature use.

In vacuum/inert atmosphere: Our high-purity graphite sheets can be stably used at 2000-3000℃.

Q4: Can you process products according to our customized drawings?

A4: Certainly. We are a professional integrated solution provider of "graphite materials + precision customized processing", and we can fully meet your customized processing requirements based on the provided drawings and technical parameters.

Q5: What was the biggest challenge you encountered when using graphite sheets in your previous applications? (e.g., fast wear, easy fracture, material contamination, etc.)

Q6: In addition to the above density and purity parameters, do you have specific requirements for batch stability and product data traceability?

Q7: You can provide us with your detailed drawings, specific application scenarios or on-site photos, and our technical team will provide more targeted and professional product suggestions and solutions for you.

Hot Tags: high-purity graphite sheet, China high-purity graphite sheet manufacturers, graphite sheet, High purity Graphite Sheet, Oxidation resistant Graphite Sheet, Pure Expanded Flexible Graphite Sheet, Thermally Conductive Graphite Sheet