Alumina Fiber Blanket

Alumina fiber needling blanket is made from alumina fibre prepared by sol-gel method through complex needling process.
Alumina fiber is composed of Al₂O₃ and SiO₂. The internal structure of the fibre is dense and the crystal form is stable. After the needle-punching process, the interlacing degree of fibers is greatly enhanced, resulting in excellent resistance to delamination, tensile strength, and surface flatness. Under high-temperature conditions, it possesses superior thermal insulation properties, allowing for long-term use in more extreme environments.
Our alumina fiber needle punched blanket product models are divided into 72 Type.

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Characteritics

Excellent thermal stability

Excellent tensile strength
Low thermal conductivity

Low heat capacity
High heat reflectance

Excellent corrosion resistance
Outstanding thermal strength

Performance Index Table

Performance		Test method	Type 72
Chemical structure AI₂O₃：SiO₂（%）		Chemical analysis	72:28
Mineral structure		XRD	δ-AI₂O₃ γ-AI₂O₃ Mullite
Classification temperature (℃)		GB/T 3003-2017	1600
Shot content (≥45 um) (% )		GB/T 5480-2017	0-2
LOI(%)		GB/T 32179-2015	0.1
Specific gravity (g/cm³)		GB/T 5071-2013	3.1
Average fiber diameter（μm)		GB/T 5480-2017	5.5-7.5
Specific heat capacity (J/kg/K)		GB/T 19466.4-2016	1.17x10³~1.21x10³
Heat shrintage(%)	1400℃ x 24h	GB/T 17911	≤1
Heat shrintage(%)	1600℃ x 24h	GB/T 17911	≤1
Thermal conductivity(W/m·k)	600℃	GB/T 17911	B.D.=100kg/m³ 0.067 0.129 0.170	B.D.=130kg/m³ 0.078 0.148 0.213	B.D.=150kg/m³ 0.091 0.172 0.266
	1000℃
	1200℃

Thickness（mm）	Bulk density（kg/m³）			Width（mm）	Length（m）
Thickness（mm）	100	130	150	Width（mm）	Length（m）
6	√	√	√	610	7.2/10.8/14.4
7.5	√	√	√	610	7.2/10.8/14.4
10	√	√	√	610	7.2/10.8/14.4
12.5	√	√	√	610	7.2/10.8/14.4
20	√	√	——	610	3.6/7.2
25	√	√	——	610	3.6/7.2

Note: Our company has a variety of specifications and types of aluminum fibre needle punched blankets, which can be customized according to customer needs.

Product APPLICATION

Automotive Industry Field

The mat of the three-way catalyst is widely used in vehicle exhaust emission systems to protect and seal the honeycomb ceramic carrier. The Dongheng three-way catalytic converter liner is applied in gasoline vehicles for TWC (three-way catalytic converter) and GPF (gasoline particulate trap); Applied in diesel vehicles for DOC (diesel oxidation catalyst), DPF (diesel particulate trap), and SCR (selective catalytic reduction).

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