Al2O3 Sapphire

Sapphire

(

Al₂O₃

)

Eigenschaften
Transmission Range	0.16 - 4.7 µm
Refractive Index	no=1.766/ne=1.758 @633nm
Reflection Loss	6.94% @2.9 µm (1 surface)
Residual Beam Wavelength	13.5 µm
Density	3.99 g/cm³
Melting point	2053 °C
Molecular Weight	101.9613
Thermal Conductivity	\|\| C: 35.1perp. C 33 @300K
Spec. Heat Capacity	753 J/(kg·K)
Thermal Expansion	perp. C 5 \|\| C 5.6 · 10^-6/ K @293K
Hardness (Mohs)	\|\| C: 1900 perp. C 2200
Young's Modulus	400 GPa
Shear Modulus	145 GPa
Bulk Modulus	207 GPa
Rupture Modulus	1200 MPa
Elastic Coefficient	C₁₁= 495; C₁₂=160; C₃₃= 497; C₄₄= 146; C₁₃= 115; C₁₄= 23 GPa
Dielectric Constant	\|\| C 10.55; perp. C8.6
Solubility in Water	unsoluble
Crystal Structure	hexagonal, a = 4.785 Å c = 12.991 Å
Crystal Type	Single crystal, synthetic
Cleavage Planes	no cleavage
Application	IR optics, laser optics, pressure optics
Remarks	esistant against solvents, most acids and bases
Remarkable	Mechanically, chemically and thermally very resistant A good thermal conductivity Low thermal expansion Max. size of crystals diameter >500 mm A good electrical insulation Thermal shock resistant Shows high resistance to solarization effects when exposed to radiation High compressive and flexural strength High laser resistance

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Al2O3 – Sapphire: Korth Kristalle - Vom Rohkristall zur hochpräzisen Optik. Durchblick für alle Wellenlängen - Seit 72 Jahren züchten wir Kristalle und fertigen daraus hochpräzise optische Komponenten für alle Wellenlängen vom IR- bis zum VUV-Bereich. Unsere Produkte kommen in allen Bereichen zum Einsatz, in denen eine hochentwickelte, präzise technische Ausstattung unerlässlich ist – von der Analytik bis hin zur Medizin- und Raumfahrttechnik.