Alumina ceramic fibers

18 Aug.,2025

 

Alumina ceramic fibers

Aerospace & Aviation

Alumina ceramic fibers can be found on almost every commercial aircraft in the world. The reason: The ceramic textiles withstand extremely high temperatures and are extremely durable. At the same time, they’re flexible and light, and meet high fire protection requirements in aircraft. They’re also used as structural reinforcement in modern metal, polymer, and oxide ceramic (CMC) composites for structural applications.

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Products made from these ceramic fibers have long been used in spacecraft as heat shields and for impact protection - in applications ranging from door seals, gaskets and gap fillers to tiles for the space shuttle. For example, blankets sewn from Nextel fabrics protect the Delta II rocket engine from the exhaust plume of the solid boosters, and Whipple shields made from Nextel fabrics protect the International Space Station and satellites from impacts from micrometeorites and space debris.

Thermal management & heat protection

In addition, these ceramic fibers are also used in a variety of high temperature sealing and heat protection applications, such as door seals, rotary kiln gaskets and furnace linings. They meet the most stringent thermal, mechanical, and electrical performance requirements, exceeding the limits of traditional high-temperature textiles such as aramid, carbon, quartz, and glass. They’re also oxidation resistant, chemically inert, lightweight, flexible, flame retardant, and electrically insulating at high temperatures.

Furnace linings

Ceramic fibers prevent erosion of ceramic fiber modules. This helps reduce dust that can contaminate products and be a problem for nearby operators and personnel. Reducing erosion of insulation structures can also help reduce maintenance costs and time.

Modern composites

Ceramic fibers make a significant contribution to the development and series production of innovative Ceramic Matrix Composites (CMC) with outstanding properties. They have the highest breaking strength even under high thermal and mechanical loads and are therefore clearly superior to monolithic ceramics. CMC can also be used to implement demanding special applications up to and including ceramic sheet.

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Thermo-mechanical properties

The aluminum oxide ceramic fibers have very good strength and flexibility even under the highest temperature stresses.

Electrical properties

The high electrical resistance of ceramic fibers at high temperatures makes them an excellent choice for high temperature electrical insulation applications.

Low shrinkage

The ceramic fibers have very low shrinkage and thus offer excellent dimensional stability.

Not hygroscopic

Due to their special surface structure, the ceramic fibers are not hygroscopic: if they are exposed to 100% humidity for two hours, they only increase by 0.08% of their original weight.

Additional advantages

There are also several other positive properties that make this material perfect for many high-tech applications. Other outstanding properties of ceramic fibers include their fire resistance, their chemical resistance and their resistance to abrasion and impact.

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Performance Advantages of Polycrystalline Alumina Fiber Non ...

The purpose of this paper is to identify the distinguishing characteristics of Polycrystalline Alumina fiber as a support mat in catalytic converters and the resulting improvements for Engine Exhaust Systems. Polycrystalline Alumina fiber (PCF) is made by Sol-Gel method. It provides excellent resiliency and thermal stability at high temperature. Because of the high temperature capability and unique diameter distribution, MAFTEC (that is a commercial PCF product) provides excellent performance and safety advantages. Needled PCF mat has superior durability that adds valuable protection that is favorable for Ultra Thin Substrate (UTS). It has excellent mechanical strength - including tensile strength, anti-peeling stress, and air force erosion resistance due to the strong structure created by an interlocking network of fibers. Consequently, MAFTEC has the best potential for low and zero-binder mats.This paper describes the origin of MAFTEC's properties, reviewing its raw materials and production process. Additionally, a review of testing results compared with other materials as outlined below.The test procedures are explained in detail. The analysis of the data and conclusions for performance differences are discussed.