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Customized Size Sapphire Crystal Watch Case with 40-20 Scratch-Dig Surface Quality and λ/4@633nm Surface Flatness

Product Details

Place of Origin: Chongqing, China

Payment & Shipping Terms

Minimum Order Quantity: 5pcs

Price: 1500-4500

Packaging Details: Carton

Delivery Time: 5-8 weeks

Payment Terms: T/T

Supply Ability: 200sets per month

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Specifications

Description

Specifications

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Material:	Sapphire	Size:	Customized Size
Color:	Optional	Growing Method:	CZ Sapphire
Packing:	Carton	Deliery Port:	Chongqing
Use:	For Watch	Drawing:	Need 3D

Material:	Sapphire
Size:	Customized Size
Color:	Optional
Growing Method:	CZ Sapphire
Packing:	Carton
Deliery Port:	Chongqing
Use:	For Watch
Drawing:	Need 3D

Description

Customized Size Sapphire Crystal Watch Case with 40-20 Scratch-Dig Surface Quality and λ/4@633nm Surface Flatness

Customized ODM Service Sapphire Crystal Watch Case High Mechanical Strength

Blue Color Sapphire Watch Case For Luxury Brand. Manufactured using the Czochralski (CZ) method, this sapphire crystal watch case offers exceptional quality and durability for luxury timepieces.

Manufacturing Process

The Czochralski method involves heating raw materials to their melting point to form a molten solution. A single crystal seed is then introduced to the surface, where temperature differences cause the solution to solidify on the seed's surface. As the seed is slowly pulled upward while rotating, the molten solution solidifies at the liquid-solid interface, forming a symmetrical single crystal ingot with the same structure as the seed.

Key Features

High transmittance
High mechanical strength
High temperature resistance
Scratch resistance
Abrasion resistance
Customized shape options
Optional colors available

Technical Specifications

Property	Specifications
Thickness	0.5-200mm
Size Tolerance	±0.01
Edge Finish	Ground and beveled
Surface Quality	40-20 scratch-dig
Surface Flatness	λ/4@633nm
Parallelism	≤3 arc min(≤0.9mrad)
Clear Aperture	>80% of central diameter
Hardness (Knoop)	1370 kg/mm²
Young's modulus	3.4*10¹¹N/m²
Thermal Limit	22W/m/K
Thermal expansion coefficient	8.4*10⁻⁶/K

Material Properties

Chemical Stability

Sapphire maintains high chemical stability and resists corrosion in most chemical reactions.

Mechanical Properties

With exceptional hardness (9 on Mohs scale) and strength, sapphire maintains stability from ultra-low temperatures to 1500°C high temperatures.

Optical Transmittance

Transmission range of 0.19nm-5.5nm, combined with chemical stability and durability, makes it ideal for harsh environment applications.

Thermodynamic Properties

Melting point of approximately 2050°C enables use in extreme processing environments.

Wear Resistance

High hardness and transparency make it perfect for precision mechanical parts and wear-resistant windows.

Additional Properties

Excellent dielectric properties, high tensile strength, erosion resistance, thermal conductivity, and remarkable thermal shock resistance.

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