The application for Beryllium Oxide Ceramics

Application Development Timeline

① 1930s: BeO began to be used as a ceramic material, initially used in metallurgical crucibles and earlier fluorescent lamp manufacturing.

② 1940s: BeO ceramics were widely used in some reactors as moderators and reflectors.

③ In the 1970s, BeO ceramics were widely used in electronic devices and electronics industries.

④ In the 1980s, the most important use of BeO ceramics was in the electronic ignition system of automobiles; in addition, it was also used for high-speed transmission of IC substrates, laser tubes on gyroscopes, automotive parts, and braking devices. Wait.

⑤ In the 1990s, with the rapid development of science and technology, communication technology and other fields, the application of BeO ceramics in the fields of communication and microelectronics industry continued to expand.

⑥ In the 21st century, BeO ceramics have been expanding in the increasingly advanced electronic packaging materials and technologies due to their high thermal conductivity and excellent electrical properties.

1.High power electronic device / integrated circuit field

The high thermal conductivity and low dielectric constant of beryllium oxide ceramics are the key reasons that make the material widely used in the field of electronic technology.

(1) In the application of electronic substrates, compared with our relatively well-known alumina substrates, the beryllium oxide substrates can be used at a frequency of 20% higher at the same thickness and can be used at frequencies up to 44GHz. It is commonly used in communications, direct broadcast satellites, mobile phones, personal communications, base stations, satellite reception and transmission, avionics, and global positioning systems (GPS).

(2) Compared with alumina ceramics, the high thermal conductivity of beryllia ceramics allows the heat generated in high-power devices to be conducted in a timely and effective manner and can withstand greater continuous-wave output power, thereby ensuring the stability and reliability of the device. Sex. Therefore, it is also widely used in wide-band high-power electronic vacuum devices, such as the energy transmission window, support rod and step-down collector of traveling wave tubes.

2. Nuclear technology materials

The development and utilization of nuclear energy is an important way to solve the problem of energy shortage. The rational and effective use of nuclear energy technology can provide huge energy for social production to supply electricity and heat. Some ceramic materials are also one of the important materials in nuclear reactors. For example, neutron reflectors and moderators (moderators) for nuclear fuel are usually made of BeO, B4C or graphite materials. Beryllium oxide can be used as a neutron moderator and radiation protection material for atomic reactors. In addition, BeO ceramics have better stability at high temperatures than metal beryllium, higher density than metal beryllium, higher strength and thermal conductivity at high temperatures, and beryllium oxide is cheaper than metal beryllium. This makes it more suitable for use as a reflector, moderator, and dispersed phase fuel matrix in a reactor. Beryllium oxide ceramics can be used as control rods in nuclear reactors. It can also be used in combination with U2O (uranium oxide) ceramics to become nuclear fuel.

3. Refractories

Beryllium oxide ceramics can be used as refractory support rods for heating elements to protect shields, furnace linings, thermocouple tubes, cathodes, thermal substrates, and coatings.

4. Other fields

In addition to the several types of applications exemplified above, the application of beryllium oxide ceramics has many aspects.

①BeO can be added as a component to glass with various components. Glass containing beryllium oxide can transmit X-rays. X-ray tubes made with this glass can be used for institutional analysis and medically to treat skin diseases. Beryllium oxide affects glass properties, such as increasing the specific gravity, water-resistance, and hardness of the glass, increasing the coefficient of expansion, refractive index, and chemical stability. It can be used not only as a special glass component with a high dispersion coefficient but also as a glass component that transmits ultraviolet rays.

② High-purity BeO ceramics have good heat transfer performance and can be used to make rocket head cones.

③BeO can be made with Be, Ta, Mo, Zr, Ti, Nb and other metals to have cermet products with specific linear (expansion) expansion coefficient and special thermal properties. For example, Ford and General Motors have used spray metal in automotive ignition BeO lining.