Lithium Tantalate
LiTaO3
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Basic Properties |
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Crystal Structure |
Trigonal, Space group R3c, Point group 3 m |
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Cell Parameters |
A = 5.154 Å |
C = 13.781 Å |
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Melting Point |
1650 °C |
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Curie Temperature |
607 °C |
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Mohs Hardness |
5.5 |
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Density |
7.46 g/cm³ |
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Dielectric Constant |
εe11 / εe0 51.7 |
εe33 / εe0 44.5 |
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Elastic Stiffness Coefficient |
CE11 2.33 ( X 1011 N/m² ) |
CE33 2.77 ( X 1011 N/m² ) |
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Piezoelectric Strain Constant |
d22 2.4 ( X 10-11 C/N ) |
d33 0.8 ( X 10-11 C/N ) |
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Transmission Range |
400 – 4500 nm |
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Electro.optical coefficients |
r33 = 30.4 pm/V |
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Refractive index at 632.8 nm |
n0 = 2.176 |
ne = 2.180 |
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Typical SAW Properties |
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Cut Type |
vs (m/s) |
k2s (%) |
TCV (10-6 / °C) |
TCD (10-6 / °C) |
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X-112° Y |
3295 |
0.75 |
-16.50 |
22.3 |
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Y-Z |
3230 |
0.66 |
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35 |
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