High quality BTO crystal substrates from MSE Supplies are trusted by the National Institute of Standards and Technology (NIST) and many other well-known research labs and companies worldwide.

Main Parameters of BaTiO₃BTO Barium Titanate Crystal Substrates
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
Domains	Multi-domains
Unit cell constant	a=3.995 Å
Melt point (°C)	1,625 °C (2,957 °F, 1,898 K)
Density (g/cm³)	6.02
Hardness (Mohs)	6-6.5
Thermal expansion coefficient (/K)	9.4 x 10^-6
Dielectric constants	e_a = 3700, e_c = 135 (unclamped) e_a = 2400, e_c = 60 (clamped)
Band gap	3.2 eV (at 300 K)
Chemical stability	Insoluble in water
Transmission wavelength	0.43-6.3um
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 side polished (SSP) or double side polished (DSP), substrate grade
Crystal orientation	(100), (110), (111), (001)
Pack	Packing in class 1000 clean room with class 100 grade plastic bag

Special Shipping Requirements:

When BTO substrates are below 13 °C, the phase transformation can lead to shattering of the BTO substrates. A battery thermal box must be added to the order to keep BTO substrates above 13 degrees Celsius.

Product: Battery thermal box for shipping and storage of BaTiO3 crystal substrates, SKU# CA0201, Price: $150 USD

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 (120 - 130 degrees Celsius).

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.

Dielectric constants of BaTiO₃ crystals.

References:

Microscale Mapping of Structure and Stress in Barium Titanate, Jane A. Howell, Mark D. Vaudin, Lawrence H. Friedman, and Robert F. Cook, Volume 125, Article No. 125013 (2020), Journal of Research of the National Institute of Standards and Technology

Scientists from the National Institute of Standards and Technology (NIST) published a new research paper using the BaTiO3 single crystal substrates supplied by MSE Supplies.

The sample for all experiments here was a BaTiO₃ single crystal formed by the top seeded solution growth method (MSE Supplies, Tucson, AZ) and used in previous strain and rotation studies of bundled domains [12, 13].1 The as-received sample was a plate, 5 mm × 5 mm × 1 mm, and nominally [100] × [010] × [001], electrically poled such that the majority of the sample was a single c domain, i.e., a domain with c axis perpendicular to the large faces. A single large face of the sample as received was prepared by chemical-mechanical polishing. An additional polishing step using colloidal silica for 5 min was performed on this face.

Applications of Barium Titanate (BaTiO3)

Applications of Barium Titanate (BaTiO₃)

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BaTiO3 BTO