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BaTiO3 BTO Barium Titanate Crystal Substrates,  MSE Supplies LLC

BaTiO3 BTO Barium Titanate Crystal Substrates

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Main Parameters
Chemical formula BaTiO3
CAS number 12047-27-7
Molecule mass (g/mol) 233.192
Crystal structure Tetragonal
Crystal growth method
Czochralski method (Cz), top seeded solution method
Unit cell constant
a=3.995 Å
Melt point (°)
1,625 °C (2,957 °F, 1,898 K)
Density (g/cm3)
6.02
Hardness (mohs)
6-6.5
Thermal expansion(/K)
9.4 x 10-6
Dielectric constants

ea = 3700, ec = 135 (unclamped)

ea = 2400, e c = 60 (clamped)

Band gap 3.2 eV (at 300 K)
Chemical stability
Insoluble in water
Transmission wavelength 0.45 ~ 6.30 mm
Refractive index no = 2.412, ne = 2.360
Size
5x5m, 10x5m, 10x10mm, 15x15mm, 20x15mm
Special sizes and orientations are available upon request
Thickness
0.5mm, 1.0mm
Size tolerances
<+/-0.1mm
Thickness tolerances
<+/-0.015 mm special in < +/-0.005 mm
Polishing
Single or double side polishing
Crystal orientation
(100), (110), (111)
Pack
Packing in class 1000 clean room with class 100 grade plastic bag

 

Applications of Barium Titanate (BaTiO3)

Barium titanate is a piezoelectric material used in microphones and other transducers. The spontaneous polarization of barium titanate single crystals at room temperature is 0.26 C/m2, and its Curie temperature is between 120 and 130 °C. Current BaTiO3 crystals are grown with the Czochralski process, which produces high purity crystals that have a large spontaneous polarization and a high Curie temperature.

Barium titanate crystals are used in nonlinear optics. The material has high beam-coupling gain, and can be operated at visible and near-infrared wavelengths. It has the highest reflectivity of the materials used for self-pumped phase conjugation (SPPC) applications. It can be used for continuous-wave four-wave mixing with milliwatt-range optical power. For photorefractive applications, barium titanate can be doped by various other elements, e.g. iron.

Thin films of barium titanate display electrooptic modulation to frequencies over 40 GHz.

The pyroelectric and ferroelectric properties of barium titanate are used in some types of uncooled sensors for thermal cameras.

Magnetoelectric effect of giant strengths have been reported in thin films grown on barium titanate substrates.