Barium Ferrite

Barium Ferrite sputtering target is a material used in physical vapour deposition technology, which mainly consists of barium ferrite, and is able to deposit barium ferrite atoms onto the substrate during sputtering to form a thin film with magnetic and high coercive properties, which is widely used in magnetic storage, microwave devices and other fields.

Characteristics

Chemical formula: BaFe₁₂O₁₉, composed of barium (Ba), iron (Fe) and oxygen (O) elements.

Appearance: Usually a black solid.

Density: Approximately 5.28 g/cm³. The high density allows the target to maintain good stability during the sputtering process and helps to improve the uniformity of the sputtered film.

Melting point: approx. 1300°C (1316°C according to some sources). The high melting point ensures that the target can withstand high energy bombardment during the sputtering process without melting and deformation, thus ensuring the stability and sustainability of the sputtering process.

Grain size: The size of the grain affects the performance of the sputtering target. Generally speaking, a smaller grain size can improve the sputtering rate and film quality of the target, but the preparation difficulty will also increase accordingly. High-quality barium ferrite sputtering targets require that the grain size be controlled within a suitable range.

Target bonding methods: commonly used elastomer bonding and indium bonding and other methods. A good bonding method can ensure a solid connection between the target and the backing plate, and ensure that the target will not be dislodged or damaged by ion bombardment during the sputtering process.

Magnetic properties: It is a magnetic material with high coercivity and magnetic energy product. This makes the thin films prepared by sputtering also have certain magnetic properties, which can be applied to magnetic storage, microwave devices and other fields that require magnetic properties.

Applications

Magnetic recording field:

Hard discs: Magnetic films can be used to prepare hard discs. The magnetic recording layer of hard discs needs to have high magnetic properties and stability. By sputtering barium ferrite films, the storage density and data reading and writing speed of hard discs can be increased.

Magnetic cards: Barium ferrite is an important magnetic material in the magnetic stripe of magnetic cards such as credit cards, hotel key cards and ID cards. Magnetic card magnetic stripes prepared using barium ferrite sputtering targets have good magnetism and durability, which can ensure accurate reading and long-term preservation of magnetic card information.

Microwave device field:

Antenna: In some microwave antennas, it can be used to prepare magnetic antenna materials. This material can show good magnetic response under the microwave frequency band, thus improving the radiation efficiency and directionality of the antenna.

Filters: The magnetic properties of barium ferrite make it valuable for use in microwave filters. By sputtering barium ferrite films, filters with specific frequency response can be prepared for signal filtering and frequency selection in microwave communication systems.

Circulators and Isolators: In microwave communication systems, circulators and isolators are important devices for controlling the transmission direction of signals and isolating reverse signals. The magnetic and dielectric properties of the material make it suitable for the preparation of key components for circulators and isolators. High-quality barium ferrite films can be obtained by sputtering target technology to improve the performance of the devices.

Electronic Components Field:

Multilayer Ceramic Capacitor (MLCC): MLCC is one of the commonly used components in electronic circuits, and it can be used to prepare the inner electrode material of MLCC. The high dielectric constant and good insulating properties of barium ferrite can improve the capacitance value and stability of MLCC.

Inductive components: In inductive components, it can be used as magnetic core material. Barium ferrite films prepared by sputtering target technology can improve the inductance value and quality factor of inductive components and reduce energy loss.

Other fields:

Sensors: Because barium ferrite has the property of being sensitive to magnetic field, it can be used to prepare magnetic sensors. For example, in automotive electronics, industrial automation and other fields, the prepared magnetic sensors can be used to detect changes in magnetic fields and achieve the measurement of physical quantities such as position, speed and angle.

Optical films: Although barium ferrite is mainly a magnetic material, it is also used in some special optical film applications. For example, in some thin-film devices with dual functions of magnetism and optics, barium ferrite sputtering targets can provide both magnetic and optical properties, expanding the range of applications for optical thin films.