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Sapphire Washer

Sapphire washers can be made into larger outer diameter and inner diameter for larger applications. Because of the inertia of sapphires, they are excellent insulators.

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Sapphire Washer
Sapphire washers can be made into larger outer diameter and inner diameter for larger applications. Because of the inertia of sapphires, they are excellent insulators. Due to the compressive strength of this material, it can withstand most conditions.

Typical application: the insulator, guide rail

Material: Synthetic sapphire/ruby single-crystal α-Al2O3, natural agate, crystallite glass and ceramic, etc.

MAIN MADE CORUNDUM PROPERTY
General	Chemical Formula	Al2O3
	Crystal System	Trigonal
	Class	Hexagonal-scalenohedral
	Melting Temperature	2030°c
Thermal	Thermal Expansion	Parallel to C-axis: 6.7× 10-6

		Perpendicular to C-axis: 5.0×10-6
	Specific Heat	0.18 Cal/gmoK（25℃）
Mechanical	Density	3.98 ~ 4.1g/cm3
	Hardness	9Moh’s Scale
		（Hv）≥1700kg/mm2
	Modulus Of Elasticity	340-380Gpa
	Compressive Strength	2.1Gpa
	Tensile Strength	0.19Gpa
Optical	Index of Refraction	Parallel to C-axis:1.769

		Perpendicular to C-axis:1.76
	Index of IR Transmission	85%
Electrical	Electrical Resistance	1016 Ω/cm(25°c)
	Dielectric Constant	7.5-10
Chemical	Corrosion Resistance	Can not be corroded by acid or alkali at normal temperature, only can be corroded by HF at 300°c

Those parts are manufactured according to the customer’s design and specifications, synthetic sapphire blank, cup bearing, stick, balls, windows, and other special parts according to the customer's drawings or request.

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