High Performance Mullite Insulation Board

Product Introduction

High Performance Mullite Insulation Board is a high-performance thermal insulation material designed for extreme temperature environments. It is manufactured from high-purity alumina (Al₂O₃) and silica (SiO₂) through advanced wet forming, vacuum dehydration, and sintering processes. The board's structure is composed of uniformly distributed polycrystalline mullite crystals, ensuring excellent strength, low thermal conductivity, and superior thermal stability.

High Performance Mullite Insulation Board can withstand continuous use at temperatures up to 1600°C, offering exceptional resistance to thermal shock, chemical corrosion, and mechanical stress. It is lightweight yet durable, making it easy to cut and install in complex furnace structures.

High Performance Mullite Insulation Boards are widely used as insulation and lining materials in industrial furnaces, laboratory kilns, heat treatment equipment, glass and petrochemical furnaces, and aerospace thermal protection systems. They provide reliable performance in energy-saving and heat-resistant applications where long-term stability and efficiency are essential.

Unique Advantages

01. Excellent high temperature stability

02. Low thermal conductivity

03. Thermal shock resistance

04. Corrosion resistance

05. Easy processing and cutting performance

06. Precise thickness and size

07. Good resistance to flame and air erosion

Product Application

Back linings for high-temperature kilns and furnaces

Hot face insulation for sintering and calcining equipment

Thermal insulation components in gas turbines and aerospace devices

Customized refractory shapes for high-temperature sealing and protection

Product Parameter

Item		Index
Classification temperature(C)		1600	1700
Use limit(C)		1450	1600
Al2O3(%)		62	70
Al2O3+SiO2 (%)		98	98.5
Density(Kg/m3)		250-600	250-600
Thermal conductivity (W/m.k)	400C	0.08	0.08
	600C	0.10	0.09
	800C	0.13	0.12
	1000C	0.15	0.15
	1200C	0.19	0.19
Linear shrinkage (%)		≤2 (1450Cx24h)	≤1.5 (1600Cx24h)
Modules of rupture (Mpa)		≥0.3	≥0.3
Compressive strength (Mpa)		≥0.25	≥0.25
Ignition loss(%)		8	8

Thermal Stability of Polycrystalline Mullite Fiber

Polycrystalline mullite fiber is an advanced refractory insulation material known for its excellent thermal stability, high temperature resistance, and mechanical strength. As a new generation of ultra-lightweight high-temperature fibers, it represents a major advancement in the Al₂O₃-SiO₂ ceramic fiber family.

With an operating temperature of 1500°C, polycrystalline mullite fiber offers 200–400°C higher heat resistance compared to conventional glassy ceramic fibers. Its thermal stability and resistance to thermal shock are unmatched by any other dense or lightweight refractory material.

These fibers are composed of a porous network of interwoven fibers, each 2–5 μm in diameter, which provides excellent flexibility and resistance to structural stress during rapid heating and cooling cycles. Even under extreme temperature fluctuations, the material maintains its integrity-it does not crack, spall, or deform after repeated thermal cycling.

Because polycrystalline mullite fiber products are naturally soft, flexible, and porous, the thermal expansion of individual fibers is internally absorbed, eliminating the need for expansion joints or special furnace drying procedures. As a result, furnaces lined with polycrystalline mullite fiber exhibit lighter structures, reduced steel consumption, and improved long-term reliability.

In summary, polycrystalline mullite fiber delivers outstanding thermal stability, durability, and energy efficiency, making it an ideal choice for industrial furnaces, kilns, and high-temperature insulation systems.

Product Certificate 

Customer visits

Packaging Display 

Related Products 

FAQ

Q1: Are you a manufacturer or a trading company?

A1: We are an experienced manufacturer with our own production base in Zibo, Shandong Province, China, established in 1993. As a directly operated factory, we guarantee competitive pricing and strict quality control, and provide comprehensive pre-sales consultation and after-sales service.

Q2: What products do you specialize in?

A2: We produce a full range of high-performance refractory and insulation materials, including:

• Ceramic fiber products

• Inorganic fiber products

• Bio-soluble fiber products

• Polycrystalline mullite fiber products

• Microporous insulation boards

• Insulating refractory bricks

• Calcium silicate products

• Rock wool insulation materials

• Production lines

Q3: Why is SUNTHERM your best choice?

A3: As an innovative manufacturer and exporter of advanced thermal insulation materials, SUNTHERM is committed to providing:

✓ High-quality Class A non-combustible materials

✓ Eco-friendly solutions with low environmental impact

✓ Body-safe products that meet international standards

✓ Cost-effective performance without compromising quality

With our technical expertise and customer-centric approach, we ensure you receive the optimal thermal insulation solution for your specific application.

Hot Tags: high performance mullite insulation board, China, suppliers, factory, customized, wholesale, price, free sample, Ceramic Fiber Composite Module, Expanded Graphite Ceramic Fiber Paper, Flame Retardant Paper, high temperature Ceramic fiber composite module, Insulated Fire retardant paper, New Fiber Material