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LT lithium tantalate LiTaO 3 crystal is an important multifunctional crystal material. The crystal has excellent piezoelectric, ferroelectric, acousto-optic and electro-optic effects , so it has become an important choice in the fields of surface acoustic wave SAW devices, optical communications, lasers and optoelectronics. basic functional materials.
Product Description
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 Features
Curie temperature point 603±2℃; Electromechanical coupling coefficient R15≥0.3; Stable chemical and physical properties
Typical Applications
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 | 7.45g/ 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 | 4"/6"/8" ingot, wafer, or custom size (SAW/Optical) |
| doping | Undoped or dopable Fe |
| 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 |
| polished surface | Roughness Ra≤1nm |
| Chamfer | 0.1mm@45° or round edge |
