Ceramic Fiber board

Scope of application

Industrial furnace linings, kiln furniture, fire protection systems, expansion joints, and thermal barriers in the metal processing, ceramic, and chemical industries.

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Ceramic Fiber board

Ceramic fiber board is a rigid thermal insulation material made from aluminum silicate ceramic fibers. These fibers are produced through a melting and spinning process involving silica (SiO₂) and alumina (Al₂O₃). After fiber formation, a controlled vacuum forming and pressing technique is used to create a strong, dimensionally stable board.

Unlike flexible ceramic fiber blankets, ceramic fiber boards offer:

Higher mechanical strength
Better rigidity
Improved thermal shock resistance
Precise shape and thickness
Enhanced resistance to airflow erosion

This makes them ideal for lining furnace walls, protecting heating zones, and reducing energy consumption in continuous high-temperature environments.

Key Features of Ceramic Fiber Board

Ceramic fiber board is preferred across multiple industries due to its excellent physical and thermal characteristics. Below are the core features that contribute to its performance advantages.

1. High Temperature Resistance

Ceramic fiber board can withstand continuous exposure to temperatures ranging from 1000°C to 1600°C, depending on fiber type.

Common temperature grades include:

Standard board: Up to 1100°C
High-purity board: Up to 1200°C
High-alumina board: Up to 1350°C
Zirconia board: Up to 1430–1650°C

These properties make ceramic fiber boards ideal for kilns, furnaces, boilers, and thermal processing equipment.

2. Low Thermal Conductivity

One of the major benefits of ceramic fiber board is its exceptionally low thermal conductivity, which ensures minimal heat loss even under extreme temperature conditions.

Typical thermal conductivity values:

0.08–0.16 W/m·K at 800°C
Significantly lower compared to refractory bricks

This directly results in:

Less heat loss
Reduced energy consumption
Faster furnace heating
Improved temperature uniformity

3. Excellent Mechanical Strength

The vacuum-forming process produces a dense, rigid structure that resists mechanical stress.

Advantages include:

High compressive strength
Stable physical dimensions under load
Good resistance to erosion by high-speed gas flows
Long service life

This makes ceramic fiber boards suitable for furnace linings, access doors, fire protection panels, and hot-face insulation.

4. Lightweight and Easy to Install

Compared to traditional refractory materials like firebricks:

Ceramic fiber boards are significantly lighter
Easy to cut, drill, shape, and handle
Can be installed using mechanical fasteners or adhesives
Do not require heavy bricklaying

This reduces installation time and overall project costs.

5. Chemical Stability

Ceramic fiber board is resistant to most chemicals except:

Strong alkalis
Hydrofluoric acid
Phosphoric acid

It is highly stable in environments involving:

Reducing atmospheres
Oxidizing atmospheres
Polluted fuel gases
Molten metal splash (depending on grade)

How Ceramic Fiber Boards Are Manufactured

The production process of ceramic fiber board involves several high-precision steps:

Step 1 – Raw Material Preparation

A high-purity mixture of:

Silica (SiO₂)
Alumina (Al₂O₃)
Optional zirconia (ZrO₂) for higher grades

is melted at 1800°C.

Step 2 – Fiber Formation

The molten mixture is converted into ceramic fibers using:

Centrifuge spinning
Blowing technologies

These fibers form the base material.

Step 3 – Vacuum Forming

Ceramic fibers are combined with binders (organic or inorganic) and vacuum-formed into a wet board.

Step 4 – Drying and Firing

The wet boards are dried and fired at controlled temperatures, improving:

Mechanical strength
Structural rigidity
Thermal shock resistance

Step 5 – Finishing and Cutting

Boards are trimmed to standard sizes or custom-cut to meet industrial design requirements.