Yttrium-Aluminum-Garnet (Y3Al5O12)
YAG - Yttrium Aluminium Garnet Crystals
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Crystal properties
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Crystal Type.
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Crystal Structure
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single crystal, synthetic
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Lattice Parameters
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a = 12.004 Å
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Orientation
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111, 100
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Application
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active laser crystals (dopants: Nd, Tm, Ho, Er, Cr) spectroscopy vacuum windows
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Solubility in Water
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none
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Dielectric Constant
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11.7
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Elastic Coefficients
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C>11> = 3.33 GPa C>12> = 1.11 GPa C>44> = 1.15 Gpa
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Young’s Modulus
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300 Gpa
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Hardness (Knoop)
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1215 (8.5 Mohs)
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Thermal Expansion.
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7.8 ×10>–6> / K (111) 7.7 ×10>–6> / K (110) 8.2 ×10>–6> / K (100)
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Specific Heat
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590 J / (kg K)
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Thermal Conductivity
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14.0 W / (m K) 13.0 W / (m K)
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Molecular Weight
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593.618
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Melting Point
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1940 °C / 1970 >o>C
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Density
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4.56 g/cm>3>
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dn / dT.
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9.86 ± 0.04 ×10>–6> / K 7.3 ×10>–6> / K
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Refractive Index
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1.8245 @ 0.8 µm 1.81523 @ 1.06 µm 1.8121 @ 1.4 µm
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Transmission Range
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0,25 ... 5 µm
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Chemical Resistance
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Inert
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Max. of Emission (nm)
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550
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Decay Constant (ns)
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70
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Absorbtion Length (cm)
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2.61
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Relative Efficiency (%)
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125
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YAG LASER ROD
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Chemical Composition
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Y3Al5O12 (Yttrium Aluminium Garnet)
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Dopant
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Neodymium, Erbium
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Dopant Concentration (atomic%)
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0.4 ~ 1.1
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Crystallographic Orientation
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(111) ± 5°
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Diameters available (mm)
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2 ~ 12
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Diameters tolerance (μm)
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± 25
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Lengths available (mm)
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30 ~ 250
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End Face Flatness
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Within λ / 10
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Parallelism of end faces
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10 arc seconds or less
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End face perpendicularity
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5 arc minutes or less
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Extinction Ratio
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30 dB Min.
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Coating
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