Barium titanate, with the chemical formula BaTiO3, is a chemical compound composed of barium (Ba) cations and titanium (Ti) cations along with oxygen (O) anions. It is a ceramic material known for its remarkable ferroelectric properties. Barium titanate is a perovskite-type oxide and is commonly used in various electronic and ferroelectric applications.

Some key properties and uses of barium titanate include:

1. Ferroelectric Material: Barium titanate is ferroelectric, meaning it can switch its polarization in response to an applied electric field. This property makes it useful in a variety of electronic devices, such as capacitors, transducers, sensors, and piezoelectric actuators.
2. Capacitors: Barium titanate is widely used as a dielectric material in multilayer ceramic capacitors (MLCCs) due to its high dielectric constant and stability over a wide range of temperatures.
3. Piezoelectric Devices: It is used in piezoelectric devices, such as piezoelectric transducers and actuators, which can convert electrical energy into mechanical motion or vice versa.
4. Non-linear Optical Applications: Barium titanate has non-linear optical properties, making it valuable in certain optical devices and modulators.
5. Pyroelectric Applications: It is used in pyroelectric sensors for detecting infrared radiation and temperature changes.

Barium titanate is a safe and stable material under normal handling conditions. However, it is essential to consider its potential toxicity when handling fine particles or dust, as with any ceramic material.

The unique ferroelectric properties of barium titanate have made it a valuable material for a wide range of electronic and electroceramic applications. Its versatility and reliable performance have led to extensive research and practical use in modern electronics and communications technology.