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OPTICAL MATERIAL

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Sapphire

OPTICAL MATERIAL

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Sapphire(Al2O3)

"SLTC is professional in steadily supplying various large size crystal bars, windows and other products in Sapphire, which is available in ultraviolet, visible light and middle infrared fields at the same time. Therefore, it is treated as one of the most ideal optical windows and protective windows of optical lenses, widely applied in aerospace and medical equipment. 

 

 

蓝宝石 sapphire

一般性能
General Properties

化学成分
Chemical Composition

Al₂O₃

 

晶形
Crystal Structure

六方
Hexagonal System

 

熔点
Melting Point

2045℃

热学性能
Thermal Properties

膨胀系数
Coefficient of Expansion

平行光轴
Parallel to C-axis:6.7x10-6
垂直光轴
Perpendicular to C-axis:5.0x10-6

 

比热
Specific Heat

0.18Cal/gm°K(25°C)

机械性能
Mechanical Properties

密度
Density

3.98-4.1g/cm3

 

硬度
Hardness

莫氏硬度:9
Moh's Hardness: 9
显微(Hv)≥1700Kg/mm2
Micro Hardness (Hv) ≥1700Kg/mm2

 

弹性模量
Elastic Modulus

340-380Gpa

 

抗压强度
Compressive Strength

2.1Gpa

 

抗拉强度
Tensile Strength

0.19Gpa

光学性能
Optical Properties

折射率
Index of Refraction

平行光轴 C-axis:1.769
Parallel Optical axis C-axis:1.769
垂直光轴 C-axis:1.76
Vertical Optical axis C-axis:1.76

 

红外透光率
Infrared Transmittance

≥85%(632.8)nm

 

透光波段
Translucent Band

0.1um-6um

电学性能
Electrical Properties

电阻率
Resistivity

>1016 Ω/cm(25 ℃)

 

介电常数
Permittivity

7.5-10

化学性能
Chemical Properties

抗腐蚀性
Corrosion Resistance

常温下不受酸碱腐蚀
在≥300 ℃情况下能被HF轻微腐蚀
will not be eroded by acids or alkalis at normal temperature,
but it will be silightly eroded by HF more than 300 ℃

 

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Time of issue:2018-08-24 00:00:00

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