Uses of Barium Titanate

Barium titanate is a mixed oxide of barium and titanium, also known as barium metatitanate, with the chemical formula BaTiO3. Barium titanate is a ferroelectric ceramic material with light refraction effect and piezoelectric properties. It can have five crystal structures in solid state, from high to low temperature: hexagonal, equiaxed, tetragonal, orthorhombic and trigonal. Except for the equiaxed, the remaining structures are ferroelectric.

Uses of Barium Titanate

Barium titanate is used as a dielectric material for ceramic capacitors and a piezoelectric material for microphones and other sensors.

Polycrystalline barium titanate shows a positive temperature coefficient, making it a useful material for thermistors and self-regulating electric heating systems.

The dielectric constant of fully dense nanocrystalline barium titanate is as high as 40%, which is higher than other materials made by traditional methods.

Barium titanate crystals are used in nonlinear optics. It has high optical coupling gain and can be maintained in the visible and near-infrared bands.

It has the highest reflectivity among materials used in self-pumped phase conjugation (SPPC) applications. It can be used for continuous wave four-wave mixing of milliwatt remote optical powers. In photorefractive applications, barium titanate can be doped with various other elements, such as cerium.