Aluminiumoxynitrid
| generally | |
|---|---|
| name | Aluminumoxynitrid |
| chemical formula | (AlN) x. (Aluminium 2 O 3) 1-x, mol portions of 0,30 ≤ x ≤ 0,37 |
| appearance | white or transparency, firmly |
| Physically | |
| melting point | ~2140 °C |
| boiling point | ? (Aluminium 2 O 3 ~3000 °C) |
| density | 3,688 g/cm 3 |
| crystal structure | cubically spinel |
| solubility | insolubly |
| Thermodynamic characteristics | |
| Δ f H 0 gas | ? kJ/mol |
| of Δ f H 0 firmly | ? kJ/mol |
| S 0 gas, 1 bar | ? J/mol·K |
| S 0 firmly | ? J/mol·K |
| as far as possible and common, are used SI-UNITs. If not differently notes, the indicated data apply with standard conditions. | |
Aluminumoxynitrid (AlON) is consisting a transparent ceramic material of aluminum, oxygen and nitrogen. It is marketed under the trade name ALON™ and in US patent NR.: 4520116 described (trivial name: transparent aluminum). The material festbleibt up to 1200°C and is harder as glass. If it is formed as Fensterglas and polishes, present material costs (2005) amount to approximate 10 to 15 US-$ per square tariff.
It is at present the entscheidenste external layer of experimental, transparent armoring, which is considered vehicles armored of US air Force as windowpanes for. Other applications contain semiconductors and commercial installations.
The articles normally manufactured of pressed, poured or in forms shifted powders. The articles formed out of it are then consolidated by heating up in a furnace and polished up to transparency. The method of polishing has a substanzielle effect on the impact resistance of armoring.
special
of transparency aluminum was mentioned in the Science Fiction film star Trek IV by the chief engineer Montgomery Scott and is used for the first time in ships of the star fleet as windowpanes. In the year 1986 to regard still as pure Science Fiction one year was submitted in former times the patent for the ceramic material.
February 2002 manufactured Fraunhofer Institut for ceramic technologies in Dresden relatives a material of transparent aluminum, sintered aluminium 2 O 3 alumina also admits under the name corundum, which is three times harder as steel. It is used in sights of modern ABC feeling tanks. It has rather a opaques (fanz. ) appearance as it full transparency would be obscure.
external one on the left of
- ALON™ product description with Surmet (pdf)
- ALON product side
- the air Force tests new transparent armoring (English article) (USAF)
- Aluminumoxynitrid spinel (ALON): A result (English article) (Storming Media)
- Raytheon and Surmet Corp. develops and marked out new Aluminumoxynitrid (ALON (R)) Products for commercial, Verteidigungs-und preservation of regional tradition applications (English article) (PRnewswire.com/alunet.net) Raytheon press release
