Lithium Niobate Properties

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 Coeffiecient 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

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