Barium Titanate
BaTiO3
Chemical name
Barium Titanate
Mineral name
Barium Titanate
Chemical formula
BaTiO3
Melting point [°C]
1618
Crystal system
tetragonal
Crystal Class
4/m (10 °C < T < 132 °C)
Unit cell
a [Å]:3.99
b [Å]:3.99
c [Å]:4.04 (at 26 °C)
Mohs hardness
4.5
Density [g/cm3]
6.06 (at 26 °C)
Refractive Index
n0=2.4912 (515 nm), 2.4160 (633 nm), 2.3681 (800 nm); ne=2.4247 (515 nm), 2.3630 (633 nm), 2.3235 (800 nm)
Piezoelectric crystals
 
termal conductivity [W/m/K]
6 (300 K)
thermal expansation coefficient [(10^(-5))/K]
15.7 || ?a; 6.2 || ?c
 
Specific heat [J/(kg*K)]
0.527 (300 K)
Crystal growth method
Top seeded solution growth (TSSG)
Transmission range
0.43 - 6.30 μm
Orientation
<100>, <110>, <001>, <111>
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)
40-60% (PureBaTiO3) at 515 nm; 50-80% (Ce:BaTiO3) at 633 nm; 40-60% (PureBaTiO3) at 633 nm
Two wave mixing coupling constant
10-40 cm^(-1)
Absorption loss [cm^(-1)]
0.285 (at 515 nm); 0.108 (at 633 nm); 0.033 (at 800 nm)
Wavelength range for photo refractive effect
visible range for undoped BTO; 480-780 nm for Ce:BTO; 720-1060 nm for Rh:BTO
Specifications
 
Standard size [mm]
10x10; 10x5, 10x3, 5x5
Thickness
0.5, 1.0 mm
Polishing
one or two side polished
Bulk
5x5x5 mm; 4x4x4 mm; 3x3x3 mm; 0° or 45° cut, 2 - 6 faces polished
Orientation accuracy
± 0.5 deg.