| Item | LiTaO3 wafers | |||
| Cutting Angle | 42°rot. Y-cut 0.2° | 36°rot. Y-cut 0.2° | Z-cut 0.2° | X-cut 0.2° |
| Diameter | 50.8±0.2 mm | 76.2±0.2 mm | 100.0±0.2 mm | 150.0±0.2 mm |
| Primary Flat Length | 16±2 mm | 22±2 mm | 32±2 mm | 47.5±2 mm |
| Secondary Flat Length | Semi-std. | |||
| Thickness | 250±25 μm | 250±25 μm | 250±25 μm | 500±25 μm |
| Propagating Surface | "+" side Ra≤10Å | |||
| Front Surface Finish | Epi-polsihed,Ra<1.0nm | |||
| Back Surface Finish | SSP:lapped/etched;DSP:Epi-polsihed | |||
| TTV | ≤10μm | |||
| BOW | ≤25μm | |||
| Curie Temperature | 603°C±2°C (DTA) | |||
| Edge Beveling | Edge grinding | |||
Customization specifications：
* Various Cutting Angle such as X-112°,Y-cut.
* Various sizes and shapes such as 10*10mm,1inch.
* Various thicknesses:0.2~1mm
* Various surface roughness such as slicing,lapping,polishing.
* LiTaO3 crystal ingots are available.
Lithium tantalate (LiTaO₃) crystals belong to the trigonal crystal system, with a density of 7.4564 g/cm³. They exhibit excellent thermal stability (melting point of 1650°C) and a wide optical transparency range (350 to 5000 nm). The refractive index and electro-optic coefficient are 2.180 (ordinary light, 632.8 nm) and 15.1 pm/V (852 nm), respectively, and they possess a high relative permittivity (ε11 = 53.6, ε33 = 43.4). In addition, lithium tantalate has significant piezoelectric and nonlinear optical coefficients, good thermal conductivity (0.05 W/cm·K), and a hardness of 5.5, making it suitable for applications in high-frequency and optical devices.
| Crystal System | Trigonal System |
| Density Crystallinity (g/cm³) | 7.4564 |
| Lattice Constant(nm) | a=0.515428, c=1.378351 |
| Cleavage Plane | (01T2) |
| Melting Point (°C) | 1650 |
| Pyroelectric Coefficient | 23×10⁻⁶C/(k·m²) |
| Optical Transparency Range | 350 ~ 5000 nm |
| Refractive Index | no = 2.180, ne = 2.176 @632.8nm |
| Electro-optic Coefficient | r13 = 8.4pm/v, r33 = 30.5pm/V |
| Nonlinear Optical Coefficient | d33 = 15.1pm/V @852nm |
| Coefficient of Thermal Expansion (10⁻⁶/°C@25°C) | α11 = 16.1, α33 = 4.1 |
| Moh's Hardness | 5.5 |
| Relative Dielectric Constant | ε11 = 53.6, ε33 = 43.4 |
| Specific Heat (Cal/cm³) | 0.79 |
| Heat Conductivity (W/cm·k) | 0.05 |
