Barium titanate
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Barium titanate (BTO) is an inorganic compound with chemical formula BaTiO3. Barium titanate appears white as a powder and is transparent when prepared as large crystals. It is a ferroelectric, pyroelectric, and piezoelectric ceramic material that exhibits the photorefractive effect. It is used in capacitors, electromechanical transducers and nonlinear optics.
Quick Facts Identifiers, Properties ...
Polycrystalline BaTiO3 in plastic | |
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ECHA InfoCard | 100.031.783 |
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CompTox Dashboard (EPA) |
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Properties | |
BaTiO3 | |
Molar mass | 233.192 g/mol |
Appearance | White crystals |
Odor | Odorless |
Density | 6.02 g/cm3, solid |
Melting point | 1,625 °C (2,957 °F; 1,898 K) |
Insoluble | |
Solubility | Slightly soluble in dilute mineral acids; dissolves in concentrated hydrofluoric acid |
Band gap | 3.2 eV (300 K, single crystal)[1] |
Refractive index (nD) |
no = 2.412; ne = 2.360[2] |
Structure | |
Tetragonal, tP5 | |
P4mm, No. 99 | |
Hazards | |
GHS labelling: | |
Warning | |
H302, H332 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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