砷化鎵
Gallium Arsenide
砷化鎵是半絕緣體,它在大功率連續(xù) CO2激光系統(tǒng)中可以替代硒化鋅用來(lái)作透鏡和窗口。砷化鎵擁有良好的硬度和強(qiáng)度,相對(duì)于較軟的基底材料,砷化鎵在多灰塵或微粒的惡劣環(huán)境下,表現(xiàn)更加突出。而較軟的基底會(huì)允許微粒嵌入光學(xué)元件中,這樣使得即使再好的鍍膜也會(huì)無(wú)濟(jì)于事。砷化鎵材料不具有吸濕性,其化學(xué)特性十分穩(wěn)定(除非與強(qiáng)酸接觸),可以安全使用。
光學(xué)性能 | 透光波長(zhǎng)范圍 | 1.0-22 μm | 機(jī)械性能 | 楊氏模量 | 83 GPa | ||||||||||||
Transmission Range | Young's Modulus | (12.04x 106 psi) | |||||||||||||||
體吸收系數(shù) | 斷裂模數(shù) | 138 MPa | |||||||||||||||
Bulk Absorption | <= 0.001 cm-1 | Mechanical Properties | Rupture Modulus | (20,000 psi) | |||||||||||||
Coefficient | @ 10.6μm | 努氏硬度 | 750 kg/mm2 | ||||||||||||||
Optical Properties | 折射率溫度系數(shù) | Knoop Hardness | |||||||||||||||
Temp. Change of | 149 x 10-6/°C | 波森比 | 0.31 | ||||||||||||||
Refractive Index | @ 10.6μm | Poisson's Ratio | |||||||||||||||
熱學(xué)性能 | 導(dǎo)熱率 | 0.48 W/cm/°C | 物理性能 | 密度 | 5.37 g/cm3 | ||||||||||||
Thermal Conductivity | @ 20° C | ||||||||||||||||
比熱 | 0.325 J/g/°C | Density | |||||||||||||||
Thermal Properties | Specific Heat | 顏色 | 黑灰色 | ||||||||||||||
線性膨脹系數(shù) | 5.7 x 10-6/°C | Physical Properties | colour | Dark gray | |||||||||||||
Linear Expansion | 晶體結(jié)構(gòu)Crystal | 閃鋅礦型晶格結(jié)構(gòu) | |||||||||||||||
Coefficient | @ 20° C | structure | zinc blende |
砷化鎵折射率(n)
(20°C室溫條件)
光學(xué)折射率 |
Wavelength |
折射率 |
Wavelength |
折射率 |
Wavelength |
折射率 |
Wavelength |
折射率 |
||||||||
(μm) |
n |
(μm) |
n |
(μm) |
n |
(μm) |
n |
|||||||||
2.6 |
3.3239 |
5.4 |
3.2991 |
8.2 |
3.2868 |
11.0 |
3.2725 |
|||||||||
2.8 |
3.3204 |
5.6 |
3.2982 |
8.4 |
3.2859 |
11.2 |
3.2713 |
|||||||||
3.0 |
3.3169 |
5.8 |
3.2972 |
8.6 |
3.2849 |
11.4 |
2.2701 |
|||||||||
3.2 |
3.3149 |
6.0 |
3.2963 |
8.8 |
3.2840 |
11.6 |
3.2690 |
|||||||||
3.4 |
3.3129 |
6.2 |
3.2955 |
9.0 |
3.2830 |
11.8 |
3.2678 |
|||||||||
3.6 |
3.3109 |
6.4 |
3.2947 |
9.2 |
3.2818 |
12.0 |
3.2666 |
|||||||||
Indices of Refraction (n) |
3.8 |
3.3089 |
6.6 |
3.2939 |
9.4 |
3.2806 |
12.2 |
3.2651 |
||||||||
4.0 |
3.6069 |
6.8 |
3.2931 |
9.6 |
3.2794 |
12.4 |
3.2635 |
|||||||||
4.2 |
3.6057 |
7.0 |
3.2923 |
9.8 |
3.2782 |
12.6 |
3.2620 |
|||||||||
4.4 |
6.6045 |
7.2 |
3.2914 |
10.0 |
3.2770 |
12.8 |
3.2604 |
|||||||||
4.6 |
6.3034 |
7.4 |
3.2905 |
10.2 |
3.2761 |
13.0 |
3.2589 |
|||||||||
4.8 |
3.3022 |
7.6 |
3.2896 |
10.4 |
3.2743 |
13.2 |
3.2573 |
|||||||||
5.0 |
3.301 |
7.8 |
3.2887 |
10.6 |
3.2743 |
13.4 |
3.2557 |
|||||||||
5.2 |
3.3001 |
8.0 |
3.2878 |
10.8 |
3.2734 |
13.6 |
3.2541 |
砷化鎵材料透過率
Gallium Arsenide Transmission