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Product Information | Advantages | Supply Forms | Technical Details | ダウンロード

Product Information

For advanced imaging, sensing and security

As one of the hardest, most durable and scratch-resistant materials, sapphire offers a broad transmission range from UV to mid-infrared wavelengths (250 – 5,000 nm). It is capable of withstanding extreme environmental conditions and fluctuations in temperature. SCHOTT, a sapphire glass supplier, offers sapphire in processed shapes according to customer’s specifications.

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Advantages

Extreme hardness and high mechanical strength (withstands intense environmental conditions)
Excellent thermal conductivity/heat resistance
High transmittance (UV to IR)
Sapphire products in optical quality and with various crystal orientations
Polished surfaces and customized coatings for various applications

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Supply Forms

Sapphire is available as:

Supply Forms	Thicknesses	Dimensions
Customized processing polishing coatings (e.g. anti-reflective coatings)	from 1 mm to 40 mm	Ø from 10 to 300 mm  from 10 to 210 mm
Plano surface Spherical surface
Various shapes from round to square

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Technical Details

Material Properties | Specifications | Transmission Curve

Material Properties

Extreme hardness and high mechanical strength (withstands extreme environmental conditions)
Excellent thermal conductivity/heat resistance
High transmittance (UV to IR)
Low dn/dT
High electrical resistance (1,014 Ohm-cm)
High dielectric constant (9.39 from 1.0 MHz to 8.5 GHz)

Specifications

Attribute	Commercial Quality	Precision Quality	Ultra-Precision Quality
Size (round and square)	Ø from 10 to 300 mm  from 10 to 210 mm
Size tolerance¹	± 0.2 mm	± 0.10 mm	± 0.05 mm
Thickness¹	From 1 to 40 mm
Thickness tolerance¹	± 0.2 mm	± 0.10 mm	± 0.05 mm
Parallelism¹	< 5 arc minutes	< 1 arc minute	< 30 arc seconds
Surface accuracy (PV)¹	5 λ (546 nm)	λ/2 (546 nm)	λ/10 (546 nm)
Surface quality (scratch & dig)	According to MIL 80 - 50	According to MIL 40 - 20	According to MIL 20 – 10
Surface roughness (Rq)	< 10 nm	< 3 nm	< 1 nm
AR coating	Custom-designed
Order quantity	Depending on customer specifications. Please contact us.
Delivery time (weeks)	6 - 10 weeks, assuming raw materials are available.

¹Depends on the geometry.

Mechanical Properties²
Tensile strength	40,000 – 60,000 psi (design criterion)	0.27 – 0.41 GPa
Flexural strength	70,000 –130,000 psi (design criterion)	0.48 – 0.89 GPa
Young’s modulus, E (25 °C) (modulus of elasticity)	50 x 10⁶ psi	345 GPa
Compressive modulus, K	55 x 10⁶ psi	379 GPa
Flexural modulus (modulus of rupture)	52 x 10⁶ psi	358 GPa
Shear modulus, G (modulus of rigidity)	21.5 x 10⁶ psi	148 GPa
Bulk modulus, k (volumetric modulus of elasticity) Poisson’s ratio	35 x 10⁶ psi 0.29	241 GPa