导航菜单
 
产品详情
MgF2
MgF2

   Magnesium Fluoride is used for optical elements in the infrared where extreme ruggerness and durability is required. The single MgF2 crystal exhibits slight birefringence through its useful transmission range and birefringence in the infrared could be useful.

Magnesium Fluoride is similar to Calcium Fluoride in its resistance to water. The MgF2 windows is sensitive to thermal shock, but does not cleave. Irradiation does not lead to color centers. MgF2 transmits well into the DUV / VUV region at the hydrogen Lyman-alpha line (121nm) and beyond. MgF2 windows and lenses are also used for most UV optics and is excellent for eximer laser application.

UV transmission of 6mm thick MgF2 sample

nm

T

nm

T

nm

T

115

24.0

145

78.0

185

90.0

117.5

38.5

147.5

79.5

190

91.0

120

50.0

150

80.0

195

91.0

122.5

58.5

152.5

82.0

200

92.0

125

64.0

155

83.0

202

92.0

127.5

68.0

157.5

84.0

204

93.0

130

69.0

160

85.0

205

93.0

132.5

71.0

162.5

86.0

206

93.0

135

72.0

165

86.0

208

93.0

137.5

74.0

170

87.0

210

93.0

140

75.0

175

88.0

215

93.0

142.5

76.0

180

89.0

220

93.0

 

MgF2 Magnesium fluoride data

Chemical Formula

MgF2

Crystal Class

tetragonal

Lattice Constant, Å

a=4.64; c=3.06

Molecular Weight

62.31

Density, g/cm3 at 291 K

3.18

Reflection Loss, % for two surfaces in the visible

4.8

Dielectric Constant for 95 x 103-42x106 Hz

5.45

Melting Temperature, K

1528

Thermal Conductivity, W/(m K) at 300 K

14-15

Thermal Expansion, 1/K at 310 K
parallel
perpendicular


14x10-6
8.9x10-6

Specific Heat, cal/(g K)
at 298 K
at 1700 K


0.24
0.362

Bandgap, eV

10.8

Solubility in water

None

Knoop Hardness, kg/mm2

415

Young's Modulus, GPa

138.5

Shear Modulus, GPa

54.66

Bulk Modulus, GPa

101.32

Apparent Elastic Limit, MPa

49.64

Poisson Ratio

0.276

 

MgF2 Refractive Index

No = Ordinary Ray    Ne = Extraordinary Ray

µm   

No

Ne

µm   

No

Ne

µm   

No

Ne

0.1137   

1.7805

 

0.1149   

1.7420

 

0.1179   

1.6800

 

0.1198   

1.6510

 

0.121   

1.628

1.632

0.130   

1.566

1.568

0.140   

1.5095

1.523

0.150   

1.480

1.494

0.160   

1.461

1.475

0.170   

1.448

1.462

0.180   

1.439

1.453

0.190   

1.431

1.444

0.200   

1.423

1.437

0.220   

1.413

1.426

0.248   

1.403

1.416

0.257   

1.401

1.414

0.266   

1.399

1.412

0.280   

1.396

1.409

0.300   

1.393

1.405

0.330   

1.389

1.402

0.337   

1.389

1.401

0.350   

1.387

1.400

0.355   

1.386

1.399

0.400   

1.384

1.396

0.546   

1.379

1.390

0.700   

1.376

1.388

1.087   

1.373

1.385

1.512   

1.370

1.382

2.000   

1.368

1.379

2.5   

1.364

1.375

3.030   

1.360

1.370

3.571   

1.354

1.364

4.000   

1.349

1.359

4.546   

1.341

1.350

5.000   

1.334

1.343

5.556   

1.324

1.332

6.060   

1.314

1.321

 

 

 

 

 

 

脚注信息
 Copyright(C)2013-2014 Tonmin inc Powered by:Tonmin Links:LED Light Bar