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Lithium tantalate LiTaO3 crystal is an important multifunctional crystal material. The crystal has excellent piezoelectric, ferroelectric, acousto-optic and electro-optic effects , so it has become a basic material in the fields of surface acoustic wave SAW devices, optical communications, lasers and optoelectronics. Functional Materials. Polished LT wafers are widely used in the manufacture of electronic communication devices such as resonators, filters, transducers, etc., especially for the manufacture of high-frequency surface acoustic wave devices due to their good electromechanical coupling
Product Description
Lithium tantalate LiTaO3 crystal is an important multifunctional crystal material. The crystal has excellent piezoelectric, ferroelectric, acousto-optic and electro-optic effects , so it has become a basic material in the fields of surface acoustic wave SAW devices, optical communications, lasers and optoelectronics. Functional Materials. Polished LT wafers are widely used in the manufacture of electronic communication devices such as resonators, filters, transducers, etc., especially for the manufacture of high-frequency surface acoustic wave devices due to their good electromechanical coupling, temperature coefficient and other comprehensive properties, and are used in Mobile phones, walkie-talkies, satellite communications, aerospace and many other high-end communication fields.
main feature
Curie temperature point 603±2℃; electromechanical coupling coefficient R15≥0.3 ; stable chemical and physical properties
typical application
Surface acoustic wave filter, resonator Q switch, optical modulator, acousto-optic switch, laser frequency doubling, optical parametric oscillator, optical memory, high temperature and high frequency ultrasonic detector, infrared detector, optical pickup device, etc.
Material properties
| Crystal structure | Trigonal system |
| Lattice constant | a=5.154Å,c=13.783Å |
| density | 7.45 g/ cm3 |
| melting point | 1650°C |
| Curie temperature | 603±2℃ |
| Moh's hardness | 5.5~6.0 |
| Dielectric constant | es11/eo:39~43, es33/eo:42~43; et11/eo:51~54, et33/eo:43~46 |
| Resistivity | 1015wm |
| Thermal expansion coefficient | a1=a2=1.61×10 -6 /℃, a3=4.1×10 -6 /℃ |
| Refractive index | n0=2.176, ne=2.180 @ 633mn |
| Electro-optic coefficient | R33=30.4 |
| Pyroelectric coefficient | 2.3×10 -7 C/cm 2 /K |
| Through range | 400nm-5000nm |
Product parameters
| size | 3", 4", 6" Ingots and Wafers (SAW/Optical) |
| doping | undoped or doped |
| Crystal rod length | ≥50mm |
| Wafer Thickness | 0.25, 0.35, 0.50(mm) |
| Tangential | Y42°/Y36°/X/Y/Z can be customized according to customer needs |
| surface treatment | Polished on one side, Polished on both sides |
| TTV | ＜5µm |
| Warpage | ≤40µm |
| Oriented Edge Width | 32.0±2.0mm can be customized |
| polished surface | Roughness Ra≤1nm |
| Chamfer | 0.1mm@45° or round edge |
