Application of Beryllium Oxide Ceramics
1. Application in high-power electronic devices and integrated circuits
In the past, the research and development of electronic devices paid more attention to performance design and mechanism design. Nowadays, more attention is paid to thermal design, and the technical problems of heat loss of many high-power devices have been solved. Less than a good solution. BeO (beryllium oxide) is a ceramic material with high electrical conductivity and low dielectric constant, which makes it widely used in the field of electronic technology. BeO ceramics are currently used in high-performance, high-power microwave packages, high-frequency electronic transistor packages, and multi-chip assemblies with high circuit density. The use of BeO material can dissipate the heat generated in the system in time to ensure the stability and reliability of the system. BeO is used for high-frequency electronic transistor packaging Remarks: A transistor is a solid semiconductor device with multiple functions such as detection, rectification, amplification, switching, voltage stabilization, and signal modulation. The transistor acts as a variable current switch capable of controlling the output current based on the input voltage. Unlike ordinary mechanical switches, transistors use electrical signals to control their own opening and closing, and the switching speed can be very fast, and the switching speed in the laboratory can reach more than 100GHz.
2. Application in nuclear reactors
Nuclear reactor ceramic materials are one of the important materials used in reactors. In reactors and fusion reactors, ceramic materials receive radiation from high-energy particles and gamma rays. Therefore, in addition to high temperature resistance and corrosion resistance, ceramic materials are also Good structural stability is required. The neutron reflector and moderator (moderator) of nuclear fuel usually adopt BeO, B4C or graphite materials. Beryllium oxide ceramics have better high-temperature radiation stability than metals, higher density than metal beryllium, good strength at high temperatures, high thermal conductivity, and are cheaper than metal beryllium. This makes it suitable for use as reflectors, moderators, and dispersed-phase combustion aggregates in reactors. Beryllium oxide can be used as control rods in nuclear reactors, and it can be used in combination with U2O ceramics to become nuclear fuel.
3. Advanced refractory material—special metallurgical crucible
BeO ceramic product is a kind of refractory material. BeO ceramic crucibles can be used for melting rare and precious metals, especially where high purity metals or alloys are required. The working temperature of the crucible can reach 2000°C. Due to its high melting temperature (about 2550°C), high chemical stability (alkali resistance), thermal stability and purity, BeO ceramics can be used to melt glazes and plutonium. In addition, these crucibles have been successfully used to produce silver, gold and platinum standards. The high "transparency" of BeO to electromagnetic radiation allows induction heating of metal samples in it.
4. Other applications
a. The thermal conductivity of beryllium oxide ceramics is good, which is two orders of magnitude higher than that of commonly used quartz, so the laser has high efficiency and high output power.
b. BeO ceramics can be added as a component to glasses of various compositions. Glass containing beryllium oxide can pass through X-rays, and X-ray tubes made of this glass can be used for structural analysis and used in medicine to treat skin diseases.
Beryllium oxide ceramics are different from other electronic ceramics. So far, its high thermal conductivity and low loss characteristics are difficult to be replaced by other materials. The requirements are strict and difficult, so that there are not many factories in the world that can produce safely. Some developed industrial countries (such as Japan) in foreign countries rely entirely on imports. The United States is the country with the largest output of BeO ceramics, the highest production technology and the best product performance in the world, followed by the United Kingdom and Kazakhstan.