Graphite parts for optical fiber
SHJ-CARBON has served the fiber optics industry for many years, gaining extensive hands-on experience in supplying graphite and carbon-based materials. We primarily provide graphite components used in the production of optical fiber preforms and fiber drawing processes.
High-purity graphite is essential in the preparation of optical fiber preforms, serving as a core material in high-temperature furnaces. It is widely used for furnace linings, heating elements, and crucibles under extreme thermal conditions. In the fiber drawing process, graphite-based heating components are critical in furnaces that transform preforms into optical fibers within the drawing tower systems.
Our expertise in material selection, combined with responsive after-sales support, has earned us the trust of our clients and led to long-term partnerships. SHJ-CARBON's graphite components-especially those used in thermal zones-are offered with tailored design and customization services. These solutions help optimize your equipment layout, improve durability, and simplify maintenance and replacement, delivering greater efficiency across fiber optic production lines.
High-Purity Graphite Components for Optical Fiber Manufacturing
SHJ-CARBON has developed a deep understanding of the specific graphite material requirements within the optical fiber industry, particularly in high-temperature systems like the graphite induction furnace for optical fiber drawing. We supply essential graphite components for preform manufacturing, where rigid graphite felt is widely used in insulation structures such as bowl-shaped and cylindrical liners. With properties like low thermal conductivity, high purity, and excellent thermal stability, rigid graphite felt ensures reliable thermal insulation and a controlled environment, directly contributing to stable preform quality and efficient fiber drawing.
For the core heating system, we offer isostatic graphite parts-such as central tubes and gas sealing rings-engineered for uniform heat distribution and structural integrity. The isotropic characteristics of isostatic graphite enable precise thermal management and consistent temperature control, which are vital for maintaining high optical fiber quality. Known for their long graphite life and performance under repeated thermal cycles, our components reduce maintenance frequency and operational costs. SHJ-CARBON also provides custom design and technical support, helping customers optimize furnace structures and improve production efficiency.
One-stop Graphite & Carbon composites solution in China
Graphite Solutions for Optical Fiber Production
High-Quality Graphite Parts
Range of Graphite Parts for Optical Fiber
We can supply：
- Heater
- Graphite Upper Gas Ring
- Graphite Lower Gas Ring
- Graphite Center Tube
- Extension Tube Graphite
- Graphite Muffle
- Graphite Susceptor
Statements：
This type of products are subject to technical confidentiality restrictions and cannot be fully shown. If you have any requirements, please contact our company. Replacement cycles vary by product and usage conditions. To determine the right timing, please contact our engineers-we'll provide expert guidance based on your specific setup
Products Description
Graphite Components in Fiber Production Equipment
In optical fiber production, graphite is mainly used during the fiber drawing stage. While preform fabrication methods like VAD and CVD require minimal graphite use, the drawing process depends on key components such as graphite central tubes (main heating elements), muffle tubes, inner and outer gas rings, graphite soft felt insulation, rigid felt insulation sleeves, graphite fixtures for preform positioning, and graphite heating elements. These parts ensure thermal stability, structural support, and precise control in high-temperature environments.
Thermal Management in Fiber Systems
Graphite plays a vital role in thermal management. As a heating element, it delivers stable and uniform heat. As a conduction layer, it efficiently transfers heat to the preform, preventing overheating and ensuring thermal balance. Graphite is also used for insulation and thermal shielding, protecting sensitive components by minimizing heat loss and maintaining consistent furnace conditions-all contributing to long graphite life and efficient operation in graphite induction furnaces for optical fiber drawing.
Graphite Materials
Isostatic Graphite
Isostatic graphite is the preferred material in optical fiber production for its uniform strength, excellent thermal shock resistance, and smooth machinability-making it ideal for critical tin bath components that demand precision and durability.
Purity is at the core of our product. Our artificial graphite block is produced with the highest level of precision, ensuring an extremely low impurity content. This high purity not only guarantees superior electrical and thermal conductivity but also minimizes the risk of contamination in sensitive applications. It's the perfect choice for industries such as electronics, aerospace, and energy, where purity is of utmost importance.
Isostatic Graphite parameters
|
Grade |
Bulk Density |
Specific Resistance |
Flexural Strength |
Compressive Strength |
Ash (Normal) |
Ash (purified) |
Grain Size |
|
g/cm³ |
μΩ.m |
MPa |
MPa |
% |
ppm |
μm |
|
|
IS-11 |
1.83 |
11~13 |
50 |
115 |
0.05 |
50 |
8~10 |
|
IS-12 |
1.90 |
11~13 |
61 |
135 |
0.05 |
50 |
8~10 |
|
IS-13 |
1.78 |
≤13 |
46 |
86 |
0.05 |
50 |
|
|
IS-14 |
1.86 |
11~12 |
65 |
135 |
0.05 |
50 |
5 |
|
IS-22 |
1.80 |
13~14 |
55 |
100 |
0.02 |
8 |
|
|
IS-23 |
1.86 |
9~12 |
55 |
110 |
0.05 |
13 |
|
|
IS-31 |
1.79 |
11-13 |
38 |
78 |
0.05 |
||
|
IS-32 |
1.85 |
11-13 |
45 |
100 |
0.05 |
Graphite Soft Felt
Graphite soft felt works well for Thermal Management in Fiber System, offering stable insulation and reliable heat protection throughout optical fiber production. It helps maintain stable temperatures, protects key components from heat damage, and supports energy efficiency throughout the process.
We can provide customized products with different materials and performance requirements for customers, with a maximum usage temperature of up to 3000 °C. Our graphite soft felt has an extremely uniform thickness and density distribution, ensuring consistent high insulation effect, stable and long-lasting performance.
Graphite Soft Felt Parameters
| Graphite Soft felt | TSF3-008(Viscose fibre) | TSF1-013 (PAN fibre) |
| Bulk density g/cm³ | 0.08-0.11 | 0.12-0.14 |
| thermal conductivity at 1000°c W/(m.k) | 0.15 | 0.24 |
| Ash content ppm | <200 | <500 |
| Highest usage temperature ℃ | 3000 | 3000 |
A trusted Graphite & Carbon Solution Partner
With 25 years of experience in high-temperature industries, SHJ-CARBON is a reliable partner for optical fiber manufacturers, offering comprehensive graphite and carbon-based solutions. We understand the unique demands of fiber drawing and preform production, and we provide a wide range of high-quality materials and custom solutions to meet these needs.
Our product range includes graphite heating elements, insulators, rollers, and bobbins, all designed to improve process stability and ensure consistent fiber quality. Additionally, our graphite felts, both soft and rigid, provide effective thermal insulation, helping to maintain stable temperatures and reduce heat loss. Backed by an experienced team and global support, SHJ-CARBON delivers reliable solutions that enhance the efficiency and performance of your fiber production process.
our Partners
We have worked with many of the world's leading brands,and almost all of our co-operators have been satisfied with our products and services,and have continued their co-operation for many years. We are looking forward to your enquiry,let's cooperate and win together!
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