Reliable Ceramic Fiber Products Supplier in China

Technical Specifications of Our Ceramic Fiber Products

Kaxite Seals provides a comprehensive range of high-performance Ceramic Fiber materials, each engineered for specific thermal management and sealing challenges. Our products are categorized by form and grade to meet precise application requirements.

Primary Product Forms & Key Parameters

• Ceramic Fiber Bulk: Loose wool for filling irregular spaces and custom packing.
  • Fiber Diameter: 2 - 4 µm
  • Shot Content: < 15%
  • Classification Temperature: 1260°C, 1400°C, 1600°C
• Ceramic Fiber Blanket: Flexible, needled blankets for furnace linings and expansion joints.
  • Density Range: 64 - 128 kg/m³
  • Thickness: 6 mm - 50 mm
  • Continuous Use Limit: Up to 1430°C
  • Thermal Conductivity (at 1000°C): 0.22 W/m·K (for 128 kg/m³ grade)
• Ceramic Fiber Board: Rigid, vacuum-formed boards for hot face linings and combustion chambers.
  • Density: 260 - 320 kg/m³
  • Compressive Strength (>10% deformation): 0.3 - 0.8 MPa
  • Linear Shrinkage (24h at 1260°C): < 2%
• Ceramic Fiber Paper: Thin, flexible sheets for gaskets, wrapping, and insulation layers.
  • Density: 180 - 220 kg/m³
  • Thickness: 0.5 mm - 6.0 mm
  • Tensile Strength: > 0.15 MPa
• Ceramic Fiber Module: Folded and pre-compressed blocks for rapid furnace installation.
  • Standard Size: 300 x 300 mm, 300 x 600 mm
  • Attachment System: Various alloy anchors (e.g., 304, 310 stainless steel)
  • Designed for minimal thermal bridging and fast installation.

Detailed Material Properties Comparison

The table below compares the critical properties of Kaxite Seals' standard ceramic fiber grades. These values are typical and may vary slightly by product form.

Ceramic Fiber FAQ: Expert Answers from Kaxite Seals

Below are answers to the most frequently asked questions about ceramic fiber, based on our decades of industry experience at Kaxite Seals.

General Properties & Selection

Q: What exactly is ceramic fiber, and what is it made of?

A: Ceramic fiber is a synthetic, lightweight refractory material composed primarily of alumina (Al₂O₃) and silica (SiO₂). It is manufactured by melting these raw materials at extremely high temperatures (over 2000°C) and then spinning or blowing the molten stream into fine, flexible fibers. Higher temperature grades incorporate additional oxides like zirconia (ZrO₂) to enhance thermal stability. The resulting material has a wool-like structure with very low density and exceptional insulating properties.

Q: How do I choose the right ceramic fiber grade for my application?

A: Selection depends on three key factors: temperature, environment, and physical requirements. First, identify the maximum continuous operating temperature and any peak temperatures your application will experience. Choose a grade whose maximum use limit is at least 50-100°C above your operating temperature for safety and longevity. Second, consider the atmosphere (oxidizing, reducing, vacuum) and potential for chemical exposure or abrasion. Third, determine the required form based on installation needs: blankets for lining large areas, modules for quick installation, boards for structural integrity, or papers/pads for gasketing and wrapping. Kaxite Seals' technical team can assist with this critical selection process.

Q: What are the key advantages of ceramic fiber over traditional refractory materials like firebrick or castable?

A: Ceramic fiber offers several distinct benefits: Lightweight: It is up to 90% lighter than dense refractories, reducing structural support requirements. Low Thermal Conductivity: It provides superior insulation, leading to significant energy savings and cooler exterior surfaces. Thermal Shock Resistance: It can withstand rapid temperature changes without cracking or spalling. Installation Efficiency: Blankets and modules install faster than brick or cast linings. Heat Storage Capacity: Its low heat capacity allows furnaces to heat up and cool down more quickly, improving process cycle times.

Installation, Safety & Performance

Q: Are there any special safety precautions for handling and installing ceramic fiber?

A: Yes. During handling and installation, ceramic fiber materials in their unbonded state can release airborne fibers that may cause temporary mechanical irritation to skin, eyes, and the respiratory tract. It is essential to follow proper safety protocols: wear appropriate personal protective equipment (PPE) including long sleeves, gloves, safety glasses, and a NIOSH-rated dust mask (N95 minimum). Ensure good ventilation in the work area. After installation, once the material is sealed in place or coated with a rigidizer, the risk of fiber release is minimized. Always refer to the Material Safety Data Sheet (MSDS) provided by Kaxite Seals for specific handling guidelines.

Q: How is ceramic fiber typically installed in an industrial furnace?

A: The two most common methods are layering blankets and installing pre-assembled modules. For blanket installation, layers are cut to size and stacked, with joints staggered between layers. They are mechanically fixed using high-temperature alloy washers and studs or anchors welded to the furnace shell. For modules, pre-folded and compressed blocks of ceramic fiber are shipped with an integral anchoring system. They are simply expanded in place and attached to a steel backing plate or directly to the furnace shell with speed clips or bolts, allowing for very rapid lining of large areas with minimal seams.

Q: What causes ceramic fiber to degrade over time, and how can I maximize its service life?

A: The primary degradation mechanisms are sintering, chemical attack, and physical erosion. Sintering is a natural process where fibers begin to bond together at very high temperatures, causing the material to shrink and become more brittle over time. Using a grade rated for your operating temperature slows this process. Chemical attack can occur from alkalis, molten metals, or certain furnace atmospheres, which may dissolve the fiber's glassy phase. Selecting a chemically resistant grade or applying a protective coating can help. Physical erosion from high-velocity gases or abrasion can be mitigated with the use of harder surfaces like ceramic fiber board or protective veneers. Proper installation without gaps and avoidance of mechanical damage during maintenance are also crucial for longevity.

Applications & Sourcing

Q: What are the most common industrial applications for ceramic fiber?

A: Ceramic fiber is ubiquitous in high-temperature industries. Key applications include: Thermal & Insulation Back-up: Behind hot-face refractories in steel ladles, reformers, and heaters. Expansion Joint Sealing: In ducting, boilers, and turbines to allow for thermal movement. Furnace & Kiln Linings: For heat treating, forging, ceramic firing, and aluminum melting furnaces. Fire Protection: As a passive fire barrier in commercial construction and around penetrations. High-Temperature Gaskets & Seals: In flanges, oven doors, and combustion systems, often using ceramic fiber paper or cord. Automotive & Aerospace: For exhaust insulation, heat shields, and firewalls.

Q: Why should I source my ceramic fiber from Kaxite Seals?

A: Kaxite Seals is not just a supplier; we are a solutions partner with deep expertise. We offer a vertically controlled quality process, from raw material sourcing to finished product, ensuring consistent performance. Our product range is one of the most comprehensive, allowing us to provide unbiased recommendations for the optimal material, not just what we have in stock. We provide full technical data, CAD drawings for seal design, and on-site support. Our global logistics network ensures reliable delivery, and our commitment to technical excellence means we stand behind the performance of every seal and insulation product we provide.