Sapphire Sheet

Sapphire Sheet combines outstanding scratch resistance, high thermal conductivity, and broad-spectrum optical transparency, making it vital in environments requiring durability, stability, and optical performance. It finds critical application in aerospace optics, display protection, infrared windows, and analytical instrumentation. Specific uses include camera sensor windows, scratch-resistant mobile display covers, and high-precision optics in IR spectroscopy and high-speed imaging systems. Advanced surface treatments such as anti-smudge coatings and eutectic-fused crack sealing methods have increased mechanical resilience and clarity under thermal and impact stress. Sapphire Sheet's performance remains consistent across high-vacuum, corrosive, or high-temperature settings, maintaining structural and optical integrity. Its continued use in microdisplay manufacturing and spaceborne sensor arrays underscores its scientific relevance. Sapphire Sheet enables the intersection of optical precision and material endurance in both frontier research and real-world industrial design.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil/Film/Sheet

Thickness		±20%

Material Properties for Ceramics

Chemical Resistance

Element	Value
Acids - concentrated	Good
Acids - dilute	Good
Alkalis	Good
Halogens	Good
Metals	Good

Electrical Properties

Element	Value
Dielectric constant	7.5-11.5
Dielectric strength( kV mm⁻¹ )	15-50
Volume resistivity( Ohmcm )	>10¹⁴@25

Physical Properties

Element	Value
Refractive index	1.71-1.79
Useful optical transmission range	200-5500nm
Apparent porosity( % )	0
Water absorption - saturation( % )	0
Density( gcm⁻³ )	3.985

Thermal Properties

Element	Value
Melting point( C )	2050
Upper continuous use temperature( C )	1800-1950
Specific heat( J K⁻¹ kg⁻¹ )	750@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	35-40@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	5.8@20-1000°C