English|中文
English|中文

BaTiO3 Single Crystal

Products > BaTiO3 Single Crystal > BaTiO3 Single Crystal
    • 1
    • 2
    • 3

BaTiO3 Single Crystal

Barium Titanate single  crystal is an excellent photorefractive material which has high SPPC  (Self pumped Phase Conjugation) reflection and two wave mixing (optical  amplification) efficiency, It is important for information processing  and image storage. Besides that it is also an important substrate  material for some special film as its unique ferroelectric and other  properties.

The followings are important for the use of BaTiO3, both for the bulk device and substrate:

1. The  tetragonal BaTiO3 single crystal (the useful phase for both  photorefractive effect and substrate) will change the phase when its  temperature is lower than 13℃ or higher 125℃, so it is necessary to keep  its temperature in the safe range during its using, storage and  transportation.
2. The extra force such as compacting, cracking will cause a phase transition.
3. Poling is needed for (001)orientation substrate, while is not necessary for （100）、（110）、（111）orientations.
4. Normally the maximum size for BaTiO3 substrate is 10x10mm; the thinnest thickness is 0.3mm.


           


           


           

BaTiO3 in growing

Boules

Finished Products

Typical Properties:

Crystal Structure

 Tetragonal(4m)    13oC<T<132 oC

Cell parameter

a=3.99Å,c=4.04Å,(at 26 oC)

Melting Point

 1891 oK  

Density

 6.06 g/cm3 (at 26 oC)

Specific Heat

0.527J/g·k(300°K)

Thermal conductivity

6 W/m·k(300°K)

Thermal expansion
            (10-6k-1）

15.7∥a  6.2∥c

Dielectric constant（εr）

εa=3000   εc=800

Hardness（Mohs）

4.5

Growth Method

TSSG(Top Seeded Solution Growth)

Index of Refraction  


515 nm

633 nm

800 nm

 no

2.4912              

2.4160              

2.3681

 ne    

2.4247              

2.3630              

2.3235  

Transmission wavelength 

 0.43 - 6.30 um

Electro Optic Coefficients

rT13=8+/-2   pm/V          
            rT33=105-/+10 pm/V
             rT42=          1300+/-100   pm/V

Reflectivity of SPPC
            ( at 0 deg. cut )

50-70 % (Ce: BaTiO3) for lamda = 515 nm
            40-60% (PureBaTiO3) for lamda = 515 nm
            50-80 % (Ce: BaTiO3) for lamda = 633 nm
            40-60%  (PureBaTiO3) for lamda = 633 nm

Two-wave mixing coupling constant

10-40  cm-1

Absorption loss

Lamda:       515 nm                633   nm            800 nm 
            a :     0.285cm-1            0.108cm-1          0.033cm-1

Wavelength range for photo refractive effect

Undoped BTO :for visible 
            Ce:BTO:480-780nm
            Rh:BTO:720-1060nm

Specifications

Standard Size: 10x10，10x5，10x3,5x5 mm, 
Thickness:   0.5mm，1.0mm. 
Polishing: one or two side polished 
Bulk:      5x5x5, 4x4x4, 3x3x3 mm, 0°or 45°cut,2-6 faces polished 
Orientation：＜100＞,  ＜110＞,  ＜001＞, ＜111＞ 
Orientation accuracy:  ±0.5°


Previous： Zero-Order Waveplates
Next： Birefringent Crystal
Return
TOP