Materion AIF3 Aluminum Fluoride for Optical Coating

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Materion AIF3 Aluminum Fluoride for Optical Coating
Categories:	Ceramic; Halide
Material Notes:	Fluoride compounds are used in coatings for the UV to middle-IR regions. They provide the lowest refractive indices and therefore are essential components of anti-reflective coatings. Fluoride films display absorption bands in the IR regions 2.8-3.2 µm and 6.0-7.4 µm to varying depths, depending on the compound and thedeposition method and parameters. High substrate temperatures, E-beam and IAD are methods that reduce the depths of the absorptions. Aluminum Fluoride, AlF3, is a well-known material which has previously been used as a coating material where a low index was required. It is not affected by water and has good mechanical strength. Information provided by Materion.
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Physical Properties	Metric	English	Comments

Density	2.90 g/cc	0.105 lb/in³	Crystal

Thermal Properties	Metric	English	Comments
Melting Point	<= 1260 °C	<= 2300 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.30 @Wavelength 10000 nm	1.30 @Wavelength 10000 nm
	1.30 @Wavelength 12000 nm	1.30 @Wavelength 12000 nm
	1.31 @Wavelength 8000 nm	1.31 @Wavelength 8000 nm
	1.32 @Wavelength 4000 nm	1.32 @Wavelength 4000 nm
	1.34 @Wavelength 800 nm	1.34 @Wavelength 800 nm
	1.34 @Wavelength 1000 nm	1.34 @Wavelength 1000 nm
	1.36 @Wavelength 600 nm	1.36 @Wavelength 600 nm
Transmission, Visible	92.0 % @Thickness 0.0110 mm	92.0 % @Thickness 0.000433 in	8% Absorption
	96.0 % @Thickness 0.0100 mm	96.0 % @Thickness 0.000394 in	4% Absorption
	98.0 % @Thickness 0.00900 mm	98.0 % @Thickness 0.000354 in	2% Absorption
	>= 99.0 % @Thickness 0.00800 mm	>= 99.0 % @Thickness 0.000315 in	<1% Absorption
	100 % @Thickness 0.000250 - 0.00100 mm	100 % @Thickness 0.00000984 - 0.0000394 in	0% Adsorption

Descriptive Properties
Color	White
Evaporation Temperature	<1100°C

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CMATER900 / 323494

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