4 Inches Black LiTaO3 Substrate Wafer Piezoelectric Single Crystal Material
4 Inches Black LiTaO3 Substrate Wafer Piezoelectric Single Crystal Material
4 Inches Black LiTaO3 Substrate Wafer Piezoelectric Crystal
Introduction:
Lithium Tantalate is a multi-functional material, which exhibits excellent electronic, electro-optical, pyroelectric, and piezoelectric properties, well-suited for SAW filters, optical communication, holographic, laser application. Polished LT wafer is widely used in electronic communication devices such as resonators, filters, and transducers, especially used surface acoustic wave devices for its good electromechanical coupling, and stable temperature Coefficient.
Main Advantages:
- High Curie temperature point
- Large Thermal power coefficient
- Small dielectric constant
- Stable chemical and physical properties
Material Properties:
|
Crystal Structure |
Trigonal |
|
Lattice Constant |
a=5.154Å,c=13.783Å |
|
Density |
7.45g/cm3 |
|
Melting Point |
1650℃ |
|
Curie Point |
603±2℃ |
|
Mohs Hardness |
5.5-6 Mohs |
|
Thermal Conductivity |
1015wm |
|
Refractive Indices |
n0=2.176 ne=2.180 @ 633mn |
|
E-O Coefficient |
R33=30.4 |
|
Transmission Range |
400-5000nm |
|
Pyroelectric Coefficient |
2.3×10-7 C/cm2/K |
|
Electromechanical Coupling Factor |
R15≥0.3 |
|
Thermal Expansion Coefficient |
a1=a2=1.61×10-6/℃, a3=4.1×10-6/℃ |
|
Dielectric Constant |
es11/eo:39~43, es33/eo:42~43；et11/eo:51~54, et33/eo:43~46 |
Crystro offers:
|
Size |
4" ,6" Boule or wafer,Acoustic or Optical grade |
|
Doping |
No Doping or With Fe |
|
Boule Length |
≥50mm |
|
Wafer Thickness |
Thickness 0.25,0.35,0.50(mm) |
|
Orientation |
Y42°/Y36°/X/Y/Z or Upon Request |
|
Surface Process |
Single/Double Sides Polishing |
|
TTV |
< 10µm |
|
BOW |
± (25µm ~40um ) |
|
Warp |
≤35µm |
|
Flat Width |
32.0±2.0(mm) or Upon Request |
|
Roughness |
Ra≤10Å |
|
Chamfer |
≤0.1mm@45° |
Picture:
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