High-Temperature Polycrystalline Mullite Fiber Board

Product Introduction

High-Temperature Polycrystalline Mullite Fiber Board is a premium-grade rigid insulation material engineered for continuous use in extreme thermal environments up to 1500°C. Manufactured from high-purity alumina–silica fibers through a controlled vacuum-forming and high-temperature sintering process, the board features a dense, uniform polycrystalline microstructure that delivers outstanding thermal stability and excellent mechanical strength.

Its low thermal conductivity, exceptional resistance to thermal shock, and minimal shrinkage under long-term high-temperature exposure make it ideal for demanding applications. The board is also lightweight, non-brittle, and highly resistant to chemical erosion (except in environments containing HF, phosphoric acid, or strong alkalis).

High-Temperature Polycrystalline Mullite Fiber Board are widely used in high-temperature furnaces, kiln linings, laboratory equipment, energy storage systems, aerospace thermal protection, and other advanced insulation systems requiring reliable, long-lasting performance.

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

Application

High-temperature industrial furnace linings: Used for kiln linings in the metallurgical, ceramic, and glass industries, with a temperature resistance of up to 1600°C.

Aerospace thermal protection: Serves as thermal insulation for high-temperature components in rocket engines and aircraft.

Chemical equipment insulation: Suitable for thermal insulation of high-temperature chemical equipment such as cracking furnaces and reactors.

New energy: Used for high-temperature equipment such as polysilicon casting furnaces and lithium battery sintering furnaces.

Power industry: Used as a high-efficiency thermal insulation material for boilers and heat pipes.

Laboratory high-temperature equipment: Provides stable thermal insulation for high-temperature furnaces and experimental equipment used in scientific research.

Heat treatment industry: Used as energy-saving linings for heat treatment equipment such as annealing furnaces and quenching furnaces.

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

Product Certificate

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FAQ

Q1: Are you a manufacturer or a trading company?

A1: We are a professional manufacturer with our own production facility. Founded in 1993 and located in Zibo, Shandong, we specialize in a comprehensive range of refractory and thermal insulation materials. Our in-house manufacturing allows us to offer highly competitive pricing along with reliable pre-sales and after-sales support.

Q2: What products do you mainly supply?

A2: Our product portfolio covers a wide selection of high-temperature insulation materials, including ceramic fiber products, polycrystalline fiber modules, bio-soluble fiber blankets, refractory bricks, calcium silicate boards, and rock wool insulation.

Q3: Do you provide free samples?

A3: Yes, we offer free samples for quality assessment. Customers are responsible only for the shipping costs.

Q4: What is the maximum service temperature of your alumina fiber board?

A4: Our standard alumina fiber board is designed for continuous operation at temperatures up to 1500°C. It delivers excellent thermal stability with minimal linear shrinkage over long-term use.

Q5: Can the board be customized in terms of size and shape?

A5: Certainly. We can customize dimensions, density, and thickness to match your specific application requirements. Please provide detailed specifications so we can prepare a tailored solution.

Q6: Do you offer technical support for installation or material selection?

A6: Yes. Our technical team offers complete support, from selecting the most suitable materials for your working conditions to providing professional recommendations for installation and application.

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