In high-temperature industrial projects, ceramic fiber provides excellent thermal insulation and resistance. Selecting compatible adhesives, anchors, and other refractory materials is crucial to optimizing their performance and lifespan. Common client questions include selecting the right adhesives and anchors, as well as combining ceramic fiber with calcium silicate boards. CVSIC will address these questions and provide insights into optimal material selection and integration for efficient and durable projects.
Ceramic Fiber and Adhesives: Ensuring Stability and Sealing
Adhesives are essential in ceramic fiber installation for bonding, sealing, and durability. Selecting the appropriate adhesive not only ensures the stability of ceramic fiber but also improves insulation performance. Below are several common types of adhesives and their compatibility with ceramic fiber:
1. High-Temperature Adhesives
- Type: Alumina-based or aluminum oxide-based high-temperature adhesives, with a temperature range typically between 1000-1600°C.
- Application scenarios: Used for bonding ceramic fiber boards and modules, or securing fiber blankets to furnace walls.
- Compatibility: CVSIC’s ceramic fiber products (such as fiber blankets and boards) are compatible with most high-temperature adhesives, especially alumina-based adhesives, as their chemical composition is similar to that of ceramic fiber, resulting in better bonding performance.
Usage Recommendations:
- Ensure the adhesive’s temperature rating matches the fiber’s operating temperature (e.g., 1260°C fiber paired with an adhesive of the same rating).
- Apply evenly to avoid overuse, which may impair the fiber’s thermal insulation performance.
- We recommend high-temperature adhesives, which feature low shrinkage and excellent thermal shock resistance.
2. High-temperature sealant
- Type: Silicone-based or ceramic-based sealant, with a temperature resistance of 800–1400°C.
- Application scenarios: Used for sealing joints in ceramic fiber blankets or modules, or for securing fiber fabrics/ropes.
- Compatibility: CVSIC’s ceramic fiber fabrics and ropes are compatible with silicone-based sealants, particularly suitable for sealing furnace doors or pipe joints.
Usage recommendations:
- Clean the joint surface before application to ensure it is free of dust or grease.
- Apply evenly using a specialized sealant gun, fill the joint, and compress to ensure airtightness.
3. Specialized Repair Adhesive
- Type: Ceramic fiber repair adhesive, with a temperature resistance up to 1600°C.
- Application scenarios: Repairing small-area damage to fiber boards or modules to extend service life.
- Compatibility: CVSIC’s low bio-persistent fiber products exhibit excellent chemical stability with the repair adhesive, with minimal performance degradation after repair.
Usage Recommendations: Clean the damaged area before repair, apply the adhesive, and follow the instructions for low-temperature preheating curing.
CVSIC Tip: Select adhesives with chemical compositions that closely match those of ceramic fibers to prevent high-temperature reactions. For tailored recommendations, call CVSIC now to receive your adhesive selection guide.
Ceramic fibers and anchors: The key to secure installation
Anchors serve as the support structure for ceramic fiber installations, securely fixing blankets, boards, or modules to furnace walls or equipment. Below are common anchor types and their compatibility with ceramic fibers:
1. Ceramic anchors
- Material: High-purity alumina or mullite, with a temperature resistance up to 1800°C.
- Application scenarios: Securing ceramic fiber modules or boards, particularly suitable for high-temperature furnace linings.
- Compatibility: CVSIC’s ceramic fiber modules are perfectly matched with ceramic anchor nails. The low thermal expansion coefficient of the nails aligns with that of the fibers, preventing loosening at high temperatures.
Usage recommendations:
- Anchor bolt spacing is typically 200–300 mm, adjusted based on fiber thickness.
- Use specialized ceramic washers to prevent tearing at fiber stress points.
2. Stainless steel anchors
- Material: High-temperature-resistant stainless steel (e.g., 310S, 316), with a temperature resistance of 800–1200°C.
- Application scenarios: Securing ceramic fiber blankets or low-temperature modules, suitable for medium-low temperature environments and budget-constrained scenarios.
- Compatibility: CVSIC fiber blankets are compatible with stainless steel anchorage components; however, in ultra-high-temperature environments (>1200°C), ceramic anchor bolts are recommended to extend service life.
Usage recommendations:
- Ensure the anchorage component surface is free of oxidation layers to enhance securing effectiveness.
- Avoid over-stretching the fibers during installation; maintain their natural state.
3. Metal Clamps and Mesh Belts
- Material: High-temperature alloy or stainless steel.
- Application Scenarios: Used for pipe wrapping or securing complex shapes with ceramic fiber blankets.
- Compatibility: CVSIC’s fiber blankets and fabrics are compatible with metal clamps; mesh belts enhance wind erosion resistance.
Usage recommendations: Clamp spacing should not be too large (recommended 150–200 mm) to ensure fibers are tightly secured.
Can calcium silicate boards and ceramic fibers be used together?
Calcium silicate boards, another common refractory material, are often used in high-temperature insulation applications due to their good rigidity and moderate cost. Can they be used with ceramic fibers? The answer is: Yes, but they must be appropriately combined based on the specific application.
Comparison of Calcium Silicate Boards and Ceramic Fiber
| Characteristic | Ceramic Fiber | Calcium Silicate Board |
| Temperature Range | 1000-1800°C | 650-1100°C |
| Thermal Conductivity | 0.1-0.25 W/m·K | 0.2-0.4 W/m·K |
| Density | 96-240 kg/m³ | 200-800 kg/m³ |
| Flexibility | High (blankets, fabrics) | Low (rigid boards) |
| Thermal Shock Resistance | Excellent | Medium |
| Typical Application | Furnace linings, pipeline insulation | Load-bearing insulation, backing |
Combined applications and advantages
The combination of calcium silicate boards and ceramic fibers performs exceptionally well in the following scenarios:
1.Composite furnace linings: Calcium silicate boards serve as the backing (low-temperature layer), while ceramic fibers (such as fiber blankets or modules) act as the heat-facing layer, combining the advantages of both:
- Calcium silicate boards provide structural support and withstand mechanical stress.
- Ceramic fiber offers ultra-low thermal conductivity, minimizing heat loss.
- Energy-saving benefits: Using them together can reduce heat loss by 30–50%, significantly improving cost-effectiveness.
2.Pipe insulation: Calcium silicate boards serve as the outer protective layer, while ceramic fiber blankets act as the inner insulation layer, balancing durability and thermal insulation performance.
3.Low-temperature zones: In areas below 1000°C, calcium silicate boards can serve as the primary insulation material, with ceramic fiber used for localized high-temperature points.
Considerations when used together
- Temperature compatibility: Calcium silicate boards typically have a temperature resistance below 1100°C; avoid direct exposure to high-temperature surfaces. It is recommended to pair them with ceramic fiber, which has higher temperature resistance.
- Chemical compatibility: Both materials are compatible in most chemical atmospheres, but in strong acid or alkali environments, confirm the corrosion resistance of calcium silicate boards.
- Installation sequence: Install calcium silicate boards as the base layer first, then cover with ceramic fiber to ensure seamless integration.
- Sealing Treatment: Use high-temperature sealant to fill the joints and prevent thermal bridging.
Use alone or in combination?
- Ceramic fiber alone: Suitable for high-temperature applications (>1100°C) requiring lightweight and high thermal shock resistance.
- Calcium silicate board alone: Suitable for low-temperature applications (<1000°C) requiring load-bearing or rigid structures.
- Combined use: Suitable for complex conditions requiring comprehensive performance (insulation + structure), offering better cost-effectiveness.
How to select suitable materials?
To ensure seamless collaboration between ceramic fiber and materials, CVSIC recommends the following steps:
- Define operating conditions: Determine working temperature, chemical atmosphere, and mechanical stress to select temperature-matched adhesives and anchors.
- Prioritize original manufacturer-matched materials: Choose materials that have been specifically matched and approved by the manufacturer, such as CVSIC’s adhesives, fasteners, and sealants, to ensure maximum compatibility with ceramic fiber and overall system reliability.
- Test compatibility: In complex or unique environments, conduct a small-scale test installation. This step helps confirm that all selected materials remain chemically and physically compatible both initially and over time.
- Seek professional guidance: Consult with CVSIC’s engineering team for tailored advice on product selection and installation best practices, reducing trial-and-error, and ensuring correct application from the start.
Why choose CVSIC?
CVSIC is not only a supplier of ceramic fiber but also your high-temperature project partner:
- Highly compatible products: Our fiber products seamlessly integrate with various adhesives and anchoring components, ensuring secure installation.
- Customized solutions: We offer a complete solution from fibers to materials, tailored to complex operating conditions.
- Safety and environmental protection: Low bio-persistent fibers comply with international environmental regulations, ensuring safety and reliability.
- Professional support: We offer free selection consultation, installation training, and maintenance recommendations to make your project hassle-free and efficient.
Conclusion: Combining ceramic fibers with complementary materials for optimal performance
The performance of ceramic fibers depends on the use of suitable adhesives, fasteners, and complementary materials. Through careful selection and installation, CVSIC’s products deliver high project efficiency and durability. Whether used alone or together, we can help provide the ideal solution.
Ready to improve your high-temperature insulation system? Contact CVSIC now for complimentary compatibility consulting or sample materials, and make your project more efficient and reliable today!
