Nanometer barium titanate is widely used in the electronics industry due to its high dielectric constant and piezoelectric properties. It is a key material in the manufacturing of multilayer ceramic capacitors (MLCCs), which are essential components in electronic devices like smartphones, computers, and automotive systems. Its ability to store and release electrical energy efficiently makes it ideal for miniaturized and high-performance electronic circuits.

In the field of energy storage, nanometer barium titanate is utilized in advanced capacitors and supercapacitors, enhancing energy density and charge-discharge cycles. It also finds applications in sensors, particularly in piezoelectric sensors, where it converts mechanical stress into electrical signals, making it valuable in pressure, acceleration, and vibration detection systems.

Additionally, nanometer barium titanate is employed in the development of ferroelectric random-access memory (FeRAM), offering non-volatile data storage with low power consumption. Its unique properties also make it suitable for use in actuators, transducers, and ultrasonic devices, contributing to advancements in medical imaging and industrial automation.

In the realm of materials science, it is incorporated into nanocomposites to improve mechanical, thermal, and electrical properties, enabling innovations in aerospace, automotive, and construction industries. Its photocatalytic activity is also being explored for environmental applications, such as water purification and air filtration, by degrading pollutants under light exposure.