Supporting cutting edge research and development with advanced materials to your needs.
High performance materials for extreme conditions.
Innovative and lightweight materials with high mechanical properties and durability.
Materials used in chemical engineering from consumables to innovative solutions.
Advanced materials characterized by high electrical or insulation performance.
High quality materials for renewable energy.
Biocompatible and biodegradable materials to the highest standards.
High purity, biocompatible materials for high performance devices and applications.
High purity materials and crucibles suitable to your needs.
State of the art materials for the next generation of technologies.
High performance materials for extreme conditions.
Durable materials for corrosive environments.
Foils, disks or windows across a range of materials to facilitate innovation.
Polymers, metal foils, and sustainable materials for your packaging needs.
Our 170,000+ range of products can cater to all your research needs.
A variety of specialist materials to support space technology needs.
Highest quality materials including graphite and lithium compounds.
High purity materials to benefit your evaporation processes.
Thin, alkali-free, borosilicate glass for LCD displays to electronic packaging applications.
Ground-breaking graphene-based nanocomposites for regenerative medicine to R&D.
An industry-leading polyimide foil by DuPont™.
A high-performance para-aramid fiber revolutionizing materials science.
A machinable glass ceramic material offering higher performance, reliability, and durability.
This versatile polyester thin film by DuPont™.
It has excellent heat and flame-resistant properties from DuPont™.
A ceramic that addresses the traditional issues of brittleness, fragility, and hardness.
This range of high purity alumina (HPA) powders has exceptional purity levels, making it one of the purest forms of alumina commercially available.
This high temperature insulation material has exceptional properties and versatile applications.
This transparent, heat resistant polyolefin resin has unique properties for a range of applications.
Toggle Nav
Grade: Nextel® 440
Formula: Al₂O₃ 70/SiO₂ 28/B₂O₃ 2
Form: Fiber
Material: Alumina/Silica/Boria
Commodity: Ceramics
Filament Diameter:
0.011mm
Number Of Filaments:
390
Tex Number:
110
Hazard Pictogram:
GHS08
Nextel® 440 Alumina/Silica/Boria Fiber (Al₂O₃ 70/SiO₂ 28/B₂O₃ 2) is part of Goodfellow's extensive range of ceramic fibers. Available in a number of variations, this flexible material is valued for its high tensile strength, thermal shock resistance and chemical stability at high temperatures. It is commonly used in high-temperature insulation, fire protection systems, filtration, and composite reinforcement for aerospace and industrial applications. With 15 variations, Goodfellow's Nextel® 440 fibers can meet the needs of many specialty material applications.
Serious health hazard
Tolerances
Fiber
| Filament Diameter | ±25% | |
|---|---|---|
| Number Of Yarns | ±10% | |
| Number Of Filaments | ±10% | |
| Tex Number | ±10% | |
| Length | +5% / -1% |
Material Properties for Ceramics
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Fair |
| Acids - dilute | Good |
| Alkalis | Poor-Fair |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant | 5.7@9.4GHz |
Physical Properties
| Element | Value |
|---|---|
| Refractive index | 1.62 |
| Density( gcm⁻³ ) | 3.05 |
Thermal Properties
| Element | Value |
|---|---|
| Sublimation point( C ) | 1800 |
| Upper continuous use temperature( C ) | 1350-1650 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 1000@500°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 5@20-1000°C |
Mechanical Properties
| Element | Value |
|---|---|
| Tensile modulus( GPa ) | 185 |
| Tensile strength( MPa ) | 2000 |