Polycrystalline mullite fiber cotton

Product Overview

Description

Polycrystalline Mullite Fiber

 

PMF (Polycrystalline Mullite Fiber) is the newest international ultra-lightweight and high-temp insulation material, consisting of mullite microcrystals, integrating the properties of crystalline and fiber material. It has superb thermal stability, whose use tempreture is 1600℃, melting point is 1840℃. Its thermal conductivity is a sixth of traditional firebricks, but the bulk density as little as 1/25 of traditional ones. So it is an ideal material to save energy and raise productivity for high-temp kilns.

It is widely applied to industrial stoves and other heating equipment in metallurgy, machinery, electronics, ceramics, chemicals, aerospace as thermal insulation lining, achieving the purpose of saving energy, raising productivity, and prolonging the furnace’s service life.

It is white, springy, soft, like cotton.

Technical Index

Chemical Composition	AL2O3:72-74% AL2O3+SiO2:~99.6%
Main Phase	Mullite
Fiber Diameter	2-3.8μm
Specific Surface Area	35.5M²/g(1000℃)
Reheating Shrinkage	~1.0%(1500℃*6hr)
Volume Weight	60-100kg/M³
Use Temperature	1600℃

 

Characteristics

Low thermal conductivity

Low heat capacity

Thermal shock resistance

Excellent chemical stability

Does not contain any binder and other corrosive substances

Still loose, pliable and has good elasticity under high temperature

 

Application

1. As basic material, can be used as raw material of fiber deep processing products such as board, paper, vacuum forming parts

2. Expansion joints or short-term insulation repair filling material

3. Thermal insulation of concrete and composite materials