TeO2 and PbMoO4
Lithium Tantalate exhibits unique electro-optical,
pyroelectric and piezoelectric properties combined with good mechanical
and chemical stability and wide transparency range and high optical damage
threshold. This makes LiTaO3 well-suited for numerous applications including
electro-optical modulators, pyroelectric detectors, optical waveguide and
SAW substrates, piezoelectric transducers etc.
Material propeties
| Chemical formula |
TeO2 |
PbMoO4 |
| Crystal class |
Tetragonal |
Tetragonal |
| Lattice constant, A |
a = 4.796
c
= 7.626 |
a = 5.432
c = 12.107 |
| Density, g/cm3 |
6.00 |
6.95 |
| Melting point , °C |
733 |
1060 |
| Mohs hardness |
4 |
3 |
| Solubility |
insoluble
in water,
in acids and bases
|
slightly soluble |
| Color |
Colorless |
Colorless or light yellow |
| Transparency
range, nm |
0.35 - 5.0 |
0.42 - 5.5 |
| Refractive
indices @ 633 nm |
no =
2.26
ne = 2.41 |
no = 2.38
ne = 2.25 |
| Thermal expansion coefficient, 10-6/ °C (@20°C) |
aa = 19
ac =
6 |
aa = 10
ac = 25 |
| Thermal conductivity , mW/cm °C |
30 |
15 |
| Dielectric Constant (@ 100 KHz) |
ea =
25
ec = 22 |
ea = 40
ec = 34 |
Acoustic
velocities , km/sec
Shear wave propagating along <110>
Longitudinal wave propagating along <001>
|
0.617
4.26
|
3.63 |
Acoustic
attenuation at 500 MHz , dB/cm
Shear wave propagating along <110>
Longitudinal wave propagating along <001>
|
2.3 |
2.5 |
Figure of merit M2 , (10-18 sec3/g)
Slow shear mode along <110>
Longitudial mode along <001>
|
1200
34.5
|
37 |
For additional property data, please contact ELAN staff.
|
