Lithium Niobate Properties

Lithium Niobate forms

Fundamental Properties

Item
Melting Point 1253° C
Crystal System Trigonal
Point Group 3m
Crystal Density 4.647 x 10³ kg / m³
Curie Temperature (Tc) 1133 ± 3°C
Heat Capacity (Cp) 89 J / k.mol
Dielectric Constants (T11) 85.2
Dielectric Constants
(T11)
85.2
 
(T33)
28.7
Elastic Constants
(CE11)
2.03 x 1011 N / m2
 
(CE12)
0.573
 
(CE13)
0.752
 
(CE14)
0.085
 
(CE33)
2.424
 
(CE44)
0.595
Piezoelectric Strain Constants
(e15)
3.7 C / m2
 
(e22)
2.5
 
(e31)
0.23
 
(e33)
1.33

Typical Acoustic Properties

Surface Acoustic Wave Properties

Description Propagation Design Surface Wave Velocity (m/s) Coupling Coefficient k² (%) Group Delay Time Temp Coefficient (ppm/°C) Propagation Loss of SAW (dB/cm)
127.86° Y - Cut X - Axis SAW 3980 5.5 75 -
64° Y - Cut X - Axis L, SAW 4742 11.3 70 -
41° Y - Cut X - Axis L, SAW 4792 17.2 50 -
Y - Cut Z - Axis SAW 3488 4.9 94 0.31 (1GHz)
SAW = Surface Acoustic Wave    L, SAW =Leaky SAW

Selective Piezoelectric Coupling Factors & Frequency Constants

Plate Orientation Wave Type Coupling Factor Resonance Frequency Constant (MHz-mm)
X S 0.68 1.838
Z E 0.17 3.615
36° Y - Cut QE 0.49 3.300
163° Y - Cut QS 0.62 1.866
E = extensional   S = shear   QE = quasi - extensional   QS = quasi - shear

Typical Optical Properties

Electro-Optic Coefficients r(10-12 mV-1) at 632.8 nm

rT13

10
rS13
11
rT22
6.8
rS22

3.4
rT33
32.2
rS33
36.7
rT51
32
rS51
18.2

Nonlinear Optical Coefficients at 1-06 μ m (*d31=d15)

d22 / l d36KDP l
6.5
d31 / l d36KDP l
-12.3
d33 / l d36KDP l
-86

Refractive Index at 632.8 nm

no
2.2880
ne

2.2030
no: TE mode    ne: TM mode