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Encyclopedia > Aluminium oxynitride
Properties
General
Name Aluminium oxynitride
Chemical formula (AlN)x.(Al2O3)1-x, mole fraction 0.30 ≤ x ≤ 0.37
Appearance White or transparent solid
Physical
Melting point ~2140 °C
Boiling point  ? ( Al2O3~3000°C)
Density 3.688 g/cm3
Crystal structure cubic spinel
Solubility insoluble
Thermochemistry
ΔfH0gas  ? kJ/mol
ΔfH0solid  ? kJ/mol
S0gas, 1 bar  ? J/mol·K
S0solid  ? J/mol·K
Safety
Ingestion Classified ?
Inhalation  ?
Skin  ?
Eyes  ?
More info  ?
SI units were used where possible. Unless otherwise stated, standard conditions were used.

Disclaimer and references A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Color is an important part of the visual arts. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... A degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701-1744), who first proposed a similar system in 1742. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid. ... A degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701-1744), who first proposed a similar system in 1742. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... The gram or gramme, symbol g, is a unit of mass. ... A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centimetre. ... Rose des Sables (Sand Rose), formed of gypsum crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... The spinels are any of a class of minerals which crystallize in the isometric system with an octahedral habit. ... A substance is soluble in a fluid if it dissolves in that fluid. ... The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 atmosphere... The joule (symbol: J) is the SI unit of energy, or work with base units of kg·m2·s-2. ... The mole and its simple conversions into different units of measurements. ... In chemistry, the standard molar entropy is the entropy content of one mole of substance, under conditions of standard temperature and pressure. ... The International System of Units (abbreviated SI from the French language name Système International dUnités) is the modern form of the metric system. ... Temperature and air pressure can vary from one place to another on the Earth, and can also vary in the same place with time. ... This page refers to the data given in chemical compound property tables. ...

Aluminium oxynitride (AlON) is a transparent ceramic composed of aluminium, oxygen and nitrogen. It is marketed under the name ALON™ and described in U.S. Patent 4520116. The material remains solid up to 1200°C, and is harder than glass. When formed and polished as a window, the material currently (2005) costs about $USD10 to $USD15 per square inch. General Name, Symbol, Number aluminium, Al, 13 Chemical series poor metals Group, Period, Block 13, 3, p Appearance silvery Atomic mass 26. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... General Name, Symbol, Number nitrogen, N, 7 Chemical series nonmetals Group, Period, Block 15, 2, p Appearance colorless Atomic mass 14. ... This article refers to the material. ...


It is currently the crucial outer layer of experimental transparent armor being considered by the US Air Force for the windows of armored vehicles. Other applications include semiconductors and retail fixtures.


Objects are usually formed from pressed, cast or molded powder. The formed objects are then densified by heating in an oven, and polished until transparent. The method of polishing has a substantial effect on the armor's impact resistance.


External links

See also


  Results from FactBites:
 
aluminum - Hutchinson encyclopedia article about aluminum (648 words)
Aluminium is a reactive element which forms stable compounds, so a great deal of energy is needed in order to separate aluminium from its ores, and the pure metal was not readily obtainable until the middle of the 19th century.
Aluminium was first discovered by Humphry Davy in 1807 and first produced in 1827 by Hans Oersted, who fused potassium with the anhydrous chloride of aluminium in a closed crucible, obtaining the metal in the form of a grey powder.
Aluminium hydroxide is used as a mordant in dyeing and aluminium chloride as a catalyst in organic reactions.
Transparent aluminum - Wikipedia, the free encyclopedia (589 words)
These are presently produced through the doping of the aluminium with appropriate elements in transparent alumina and in ruby, corundum, sapphire, and related aluminium compounds.
Traditional photonic bandgaps, based on introducing spatial holes in aluminium, are likewise possible, but these would require the introduction of numerous physical holes with roughly the diameter of the wavelengths of light for which transparence were desired; but such would presumably weaken aluminium structures.
This is aluminium composed of nanometre scale particles as a solid transparent material, whose colour can be varied by sizing the particles differently.
  More results at FactBites »

 

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