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Polycrystalline mullite fiber cotton
Polycrystalline mullite fiber cotton - Deqing Guotai Fireproof Material Factory
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Polycrystalline mullite fiber cotton

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

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