Ceramic fiber is a lightweight, high-temperature insulation material composed primarily of alumina-silica. Manufactured through a melting and fiberizing process, it creates a wool-like product with exceptional thermal stability and low thermal conductivity. This material is engineered to provide reliable insulation in extreme environments where traditional refractories fail. Kaxite specializes in producing advanced ceramic fiber solutions that meet the rigorous demands of modern industrial applications, from furnace linings to thermal barriers in aerospace.
Choosing Kaxite ceramic fiber insulation offers numerous operational and economic benefits:
Our product range is categorized by temperature rating and composition. The following tables detail the standard specifications for Kaxite ceramic fiber products.
| Grade | Max Service Temperature (°C/°F) | Al2O3 Content (%) | Density Range (kg/m³) | Thermal Conductivity (W/m·K) @ 500°C | Typical Applications |
|---|---|---|---|---|---|
| Kaxite Standard Grade | 1260 / 2300 | 44-47 | 64-128 | 0.12 | Back-up insulation, general furnace linings |
| Kaxite High Grade | 1400 / 2552 | 52-55 | 96-128 | 0.15 | Forging furnaces, heat treatment equipment |
| Kaxite Zirconia Grade | 1427 / 2600 | 39-40 (with 15% ZrO2) | 128 | 0.18 | High-temperature kilns, petrochemical cracking furnaces |
| Property | Test Standard | Kaxite Board (Density: 260 kg/m³) | Kaxite Folded Module |
|---|---|---|---|
| Cold Crushing Strength | ASTM C133 | 1.2 MPa | N/A |
| Linear Shrinkage (24h at Max Temp) | ASTM C356 | < 2% | < 2% |
| Permanent Linear Change | ASTM C210 | < -1.5% | < -2.0% |
| Shot Content (Particles > 0.25mm) | Internal Method | < 15% | < 12% |
What is the primary difference between ceramic fiber and traditional brick insulation?
Traditional firebrick is dense, has high heat storage, and is excellent for radiant heat applications but leads to slow thermal cycling and high energy consumption. Ceramic fiber, like Kaxite's products, is lightweight, has very low thermal mass and conductivity, enabling faster heat-up/cool-down times, superior energy efficiency, and easier installation, especially on complex geometries.
Is ceramic fiber safe to handle? What are the necessary precautions?
Fresh, unbound ceramic fiber can be irritating to skin, eyes, and the respiratory system. Kaxite products are treated to minimize dust. During installation, it is imperative to wear appropriate PPE: a P2/N95 respirator, safety goggles, gloves, and long-sleeved clothing. Always follow OSHA or local safety guidelines. Once installed and heated, the fibers become a stable, non-respirable ceramic material within the matrix.
Can Kaxite ceramic fiber be used in direct contact with flames?
Yes, most Kaxite ceramic fiber products are designed for direct flame impingement and can be used as hot face linings. However, selection is critical. High-velocity burner jets or highly reducing atmospheres may require a protective coating or veneer. Consult Kaxite engineering for your specific application to ensure the correct grade and installation method are used.
How does the temperature rating affect my choice of ceramic fiber?
The maximum service temperature is the most critical parameter. Exceeding it will cause excessive shrinkage, sintering, and failure. Always select a grade where the maximum continuous operating temperature is at least 50-100°C above your actual process temperature to account for hotspots and ensure longevity. Kaxite offers a range from 1260°C to 1427°C to match various industrial needs.
What forms does ceramic fiber come in, and how do I choose?
Kaxite supplies ceramic fiber in multiple forms:
What causes shrinkage in ceramic fiber, and how does Kaxite minimize it?
Shrinkage occurs at high temperatures as fibers begin to devitrify and sinter together. The rate depends on temperature, time, and atmosphere. Kaxite minimizes shrinkage by controlling the chemical composition (higher alumina content improves stability), fiber diameter, and shot content. Our manufacturing process ensures a consistent, high-purity fiber with published shrinkage data to allow for proper design allowances.
Can ceramic fiber get wet? What happens if it does?
Ceramic fiber is hygroscopic and will absorb moisture. While getting wet does not permanently damage its high-temperature properties, it can make handling difficult, cause temporary weight increase, and lead to steam generation during initial heat-up, which could damage the lining. Kaxite recommends storing products in a dry place. If insulation gets wet, it must be thoroughly dried out slowly before being put into high-temperature service.
How is ceramic fiber installed in a furnace or kiln?
Installation methods vary by product form. Blankets are typically layered and secured with high-temperature anchors or washers. Boards are cut to size and mechanically fastened. Pre-fabricated Kaxite modules are the fastest method, installed via a welded anchor system in a staggered pattern. Proper anchor type, density, and installation are crucial for lining longevity and must follow engineered designs.
What industries commonly use Kaxite ceramic fiber?
Kaxite ceramic fiber insulation is utilized across a broad spectrum of industries, including: Iron & Steel (furnace linings, ladle covers), Petrochemical & Refining (fired heaters, reformer furnaces), Aluminium (holding furnaces, melters), Ceramics & Glass (kiln car tops, hot face lining), Power Generation (boiler insulation, expansion joints), and Aerospace (fire protection, thermal barriers).
