High Temperature Graphite Furnace
Delivering Dependable Performance for Every High-Temperature Challenge
Description
High-Performance Isostatic Graphite for Heating Elements
SHJ CARBON specializes in providing advanced isostatic graphite materials and custom-engineered graphite heaters for high-temperature and vacuum furnace applications. With over 25 years of experience in graphite and carbon material solutions, we serve as a strategic partner to global furnace manufacturers - offering both the material foundation and engineering expertise required for reliable, long-life thermal systems. Our role extends beyond raw material supply;
we deliver precision-engineered heating elements and graphite assemblies designed for real-world performance in demanding thermal environments.
Our isostatic graphite heaters are engineered for stability under extreme temperatures and vacuum conditions, combining a uniform microstructure, exceptional purity, and outstanding machinability. Each component - whether used as a heating body or conductive connector - is designed to ensure consistent electrical resistivity, efficient thermal transfer, and prolonged operational lifespan. This combination of material science and engineering precision sets the foundation for the comprehensive furnace solutions that follow.
Advantages of Isostatic Graphite
in Vacuum Furnace Heaters
1. High Temperature Endurance – Performs steadily up to 3000 °C in inert or vacuum environments without deformation.
2. Uniform Isotropy – Isostatic pressing ensures equal density and mechanical strength in all directions, preventing localized stress or cracking.
3. High Purity & Low Ash (<5 ppm) – Prevents contamination during heat treatment, crystal growth, or semiconductor processes.
4. Excellent Thermal & Electrical Conductivity – Enables fast, uniform heating and stable resistance.
5. Superior Machinability – Allows precise fabrication of complex geometries such as heater plates, connectors, and support frames.
SHJ Isostatic Graphite Specifications
| Grade | Bulk Density |
Shore Hardness |
Ash Content |
Compressive Strength |
Flexural Strength |
Resistivity | Thermal Grain Conductivity Size |
Grain Size |
| ■IS-11 | 1.82g/cm³ | 63HSD | 50PPM | 115Mpa | 52Mpa | 10~15μQm | 120W/mk | 8~10μm |
| ■IS-15 | 1.90g/cm³ | 72HSD | 50PPM | 160Mpa | 70Mpa | 11~13μΩm | 110~120W/mk | 5μm |
| ■IS-14 | 1.85g/cm³ | 68HSD | 50PPM | 120Mpa | 62Mpa | 11~13μΩm | 100~120W/mK | 7μm |
| ■IS-41 | 1.78g/cm³ | 76HSD | 100PPM | 122MPa | 69MPa | 15.7μΩm | - | 10μm |
| ■IS-42 | 1.78g/cm³ | 65 HSD | 300PPM | 113Mpa | 57Mpa | 12.5μΩm | - | 13μm |
| ■ IS-51 | 1.81g/cm³ | 60HSD | 50PPM | 90Mpa | 45Mpa | 11~14μΩm | - | 12μm |
| ■IX-11 | 1.80g/cm³ | 85HSD | 200PPM | 180Mpa | 90Mpa | 25μQm | - | 4μm |
| ■IX-12 | 1.81g/cm³ | 92HSD | 200PPM | 190Mpa | 92Mpa | 25μΩm | - | 4μm |
| ■FM-12 | 1.75g/cm³ | 42HSD | 500PPM | 65Mpa | 38Mpa | 8~11μΩm | 110~120W/mk | 13μm |
| ■FM-13 | 1.85g/cm³ | 48HSD | 50PPM | 85Mpa | 46Mpa | 8~10μΩm | 130~140W/mk | 13μm |
| ■FM-22 | 1.80g/cm³ | 50HSD | 1000PPM | 75Mpa | 38Mpa | 12μΩm | - | 13μm |
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Applications in High Temperature & Vacuum Furnace Systems
The vacuum and sintering furnace is where SHJ CARBON's isostatic graphite truly proves its value.
Inside these demanding environments, our graphite heaters and connectors serve as the core heating structure - delivering stable temperature distribution, precise electrical performance, and long service life even under continuous high-temperature operation.
Each heater is carefully engineered and machined to maintain dimensional stability and purity, ensuring reliable operation throughout repeated heating cycles.
Beyond vacuum systems, SHJ CARBON's isostatic graphite materials are also trusted in crystal growth and diffusion equipment, CVD and PVD coating systems, semiconductor heat-treatment lines, and industrial test furnaces.
In every application, the same principle applies: consistent performance, controlled thermal expansion, and reduced downtime.
Integrated Solution - From Graphite Material to Heater Assembly
SHJ CARBON provides one-stop graphite solutions, covering every stage from material selection to final product integration.
|
Customer Requirement |
SHJ CARBON Solution |
|
Need for high-temperature stability |
Tailored isostatic graphite grades (1.83–1.95 g/cm³) |
|
Custom heater geometry or connector design |
Precision CNC machining & 3D simulation |
|
Quality consistency & lifespan testing |
Batch control, FEM design validation |
|
International supply & documentation |
ISO 9001 certified system + export technical files |
Our factory & quipment
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We don't just supply graphite - we deliver engineered reliability for your furnace systems.
Advancing Graphite Solutions with Reliability
With more than 25 years of focused experience in graphite and carbon materials, SHJ CARBON has grown into a dependable partner for vacuum furnace builders, semiconductor equipment suppliers, and precision heat-treatment manufacturers.
Our reputation is built not only on stable supply and machining capability, but also on the consistency we achieve through continuous process optimization and technical refinement.
In recent years, as China's isostatic graphite industry rapidly advances, SHJ CARBON has stayed at the forefront - integrating new production technologies, tighter quality control, and smarter machining systems to deliver products that meet international performance standards.
Every project we undertake reflects the same commitment: to help customers achieve safer, more efficient, and more reliable furnace performance through materials that evolve with the industry.
Precision Materials.
Reliable Performance. Proven in Heat.
Full traceability and controlled material consistency
Proven export performance across 30+ countries
Ongoing R&D investment in graphite densification&machining
Engineering support from prototype to long-term batch supply
Frequently Asked Questions
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1. What is an isostatic graphite heater used for?
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It's used as a heating element inside vacuum or high-temperature furnaces, providing uniform thermal output and stable resistance in extreme environments.
2. Why is isostatic graphite preferred for vacuum furnaces?
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Because of its uniform structure, high purity, and isotropic strength, it delivers longer lifespan and greater stability than molded or extruded graphite under high thermal stress.
3. How long does an isostatic graphite heater last?
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Typically 1.5–3 years, depending on operating temperature, cycle frequency, and cooling method. Proper installation and current control extend its service life significantly.
4. Can isostatic graphite components be customized for my furnace?
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Yes. SHJ CARBON provides CNC-machined components tailored to your furnace size, design, and required electrical specifications.
5. What is the difference between isostatic graphite and molded graphite?
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Isostatic graphite has uniform properties in all directions due to equal-pressure pressing, offering better mechanical strength, precision, and reliability - especially in demanding high-temperature environments.
Get Your Custom Isostatic Graphite Heater Solution
Whether you're upgrading an existing furnace or building a new system, our engineers can recommend the most suitable graphite grade, geometry, and connection design.
Send us your drawings, furnace type, or temperature range - we'll provide a tailored quotation and technical proposal within 24 hours.
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