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LiTaO3 substrate

LiTaO3 substrate

 

Major capability parameter

Crystal structure

Rhombohedral 

Lattice constant

a=5.154Å c=13.783 Å 

Melting point

1650 ℃

Density

7.45 g /cm3

Curie temperature

610 ℃

Hardness

5.5 - 6 Mohs

Thermal expansion coefficient

A a= 1.61 x 10-6 c= 4.1 x 10-6 K / A / K

Resistance coefficient

1015 W.m

Dielectric constant

es11 / e0:  39 ~43        es33 / e0:  42 ~43
et11 / e0:  51 ~54        et11 / e0:  43 ~46

Colour

colourless

Transmission range

0.4~5.0 um

Refractive index

no = 2.176 ne= 2.180 @ 633 nm

Surface Roughness (Ra)

<5A

Product specifications:

Product Name

Optical grade LiTaO3

SAW grade LiTaO3

Axial

Z-cut +/- 0.2°

 36°Y-cut, 42° Y-cut, X-cut
(+/- 0.2°)

Standard Size

Dia1"(25.4mm) +/-0.3mm

Dia 3" (76.2mm)+/-0.3mm

Dia 4" (100mm)+/-0.3mm

10×10mm +/-0.05mm

Dia1"(25.4mm) +/-0.3mm

Dia 3" (76.2mm)+/-0.3mm

Dia 4" (100mm)+/-0.3mm

10×10mm +/-0.05mm

Orientation Flat

22mm+/-2mm

22mm+/-2mm

32mm+/-2mm

Thickness

500um+/-20um

1000um+/-20um

500um+/-20um

1000um+/-20um

TTV

<10um

<10um

Curie temperature

605℃+/-0.7℃(DTA method)

605℃+/-3℃(DTA method)

Surface Quality

Single or Double sided polished

Single or Double sided polished

Chamfer

Edge rounding

Edge rounding

 

Lithium tantalate(LiTaO3) crystal has excellent electro-optic, piezoelectric and pyroelectric properties, the pyroelectric coefficient is 2.3 × 10 -7 C/cm 2 /K. It growth by Czochralski method. LiTaO3 used as a Q-switch in laser technology, as a pyroelectric detector in infrared technology, and used in the electronics industry to make filters and resonators.

 

 
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