Barium Titanate ( BaTiO3 )

Barium Barium
Crystal properties      
Crystal Structure Tetragonal(4m) 13oC<T<132oC    
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 0.527 J/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(εer) εea=3000 εec=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:
a :

515 nm
0.285cm-1

633 nm
0.108cm-1

800 nm
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 5 x 5 x 5 mm 4 x 4 x 4 mm 3 x 3 x 3 mm,
  0° or 45° cut, 2 - 6 faces polished    
Orientation <100>, <110>, <001>, <111>    
Orientation accuracy ± 0.5°