Yttrium aluminium garnet YAG is an isotropic crystal with cubic symmetry. It has excellent optical and thermodynamic properties. Its mechanical properties and chemical stability are similar to those of sapphire crystals, without the birefringence effect of sapphire. Pure YAG crystals have high transmittance in the range of 0.25-5um, ranging from 2-3 μ There is no absorption in the range of m, but the glass has a strong H2O Absorption band. Therefore, undoped pure YAG crystals are a new type of substrate and window material for ultraviolet and infrared optical devices. Meanwhile, the excellent physical, chemical, and optical properties of YAG crystals make them important optical applications in high-temperature and high-energy physical environments
Performance Parameter
| Crystal Structure | Cubic |
| Lattice Constant | 12.01Å |
| Melting Point | 1970℃ |
| Mhos Hardness | 8.5 (mohs) |
| Density | 4.55 (g/cm3) |
| Specific Heat | 0.59 (J/g•cm-3) at 0-20℃ |
| Elastic Modulus | 310GPa |
| Youngs Modulus | 3.17x104kg/mm2 |
| Poisson Ratio | 0.3 |
| Tensile Strength | 0.13-0.26GPa |
| Thermal Expansion | [111]: 7.8x10-6/K@0-250℃ [110]: 7.7x10-6/K@0-250℃ [100]: 8.2x10-6/K@0-250℃ |
| Thermal Conductivity | 14W/mK@20℃ 10.5W/mK@100℃ |
| Thermo-Optic Coefficient | dn/dt = 7.3x10-6/℃ |
| Thermal-Shock Resistance | 800W/m |
| Solubility | Insoluble in water and slightly soluble in acid
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