Beryllium oxide ceramics have the characteristics of high thermal conductivity, high melting, strength, high insulation, low dielectric constant, low dielectric loss and good packaging process adaptability. And the field of optoelectronics technology has received attention and applications, especially in high-power semiconductor devices, high-power integrated circuits, high-power microwave vacuum devices and nuclear reactors. It has always been the mainstream ceramic material for the preparation of high thermal conductivity components. It has been Cordierite Ceramic used in the military field and the national economy. To a very important role. Beryllium oxide ceramics have been widely used because of their electromechanical and thermal properties unmatched by other ceramics. Especially in some special applications, other ceramic materials are irreplaceable. However, the toxicity of beryllium oxide cannot be ignored. As countries in the world pay more and more attention to environmental protection, the use of beryllium oxide ceramics may be subject to certain restrictions and influences in the future. In 2012, the Swedish Ericsson company formulated the "Ericsson Product Producer Extended Responsibility Strategy". It lists the company's list of banned and restricted substances in production and products, and has formulated a plan to phase out alloy solders and phase out beryllium oxide ceramics (BeO). Aluminum nitride ceramic material is a high thermal conductivity ceramic material that is expected to partially replace beryllium oxide ceramics. In recent years, research on aluminum nitride ceramics has been very active, and many universities and research institutes in my country are engaged in research in this area. Research and development are mainly centered on substrate materials, but there are also research trends in the application of high-temperature structures. How to improve the thermal conductivity of aluminum nitride ceramics has been solved to a large extent, and how to reduce the sintering temperature of aluminum nitride ceramics and improve the direction of mechanical properties remains to be further studied. BeO ceramic products are also a refractory material. BeO ceramic crucible can be used to melt rare metals and precious metals, especially in the occasions requiring high-purity metals or alloys. The working temperature of the crucible can reach 2000°C. Due to Cordierite Ceramic its high melting temperature (approximately 2550°C), high chemical stability (alkali resistance), thermal stability and purity, BeO ceramics can also be used to melt uranium and plutonium. In addition, these crucibles have been successfully used to make standard samples of silver, gold and platinum. BeO's high degree of "transparency" to electromagnetic radiation allows the use of induction heating to smelt the metal samples in it.
In avionics technology conversion circuits and aircraft and satellite communication systems, BeO is widely used as bracket components and assembly parts; it also has application prospects in spacecraft electronics. The use of BeO ceramics has particularly high thermal shock resistance, and can be used in the squib of jet aircraft. Metal-coated BeO sheets have been used in the control system of aircraft driving devices; Ford and General Motors have used metal-sprayed beryllium oxide linings in automobile ignition devices. BeO ceramics have good thermal conductivity and are easy to be miniaturized. They have broad application prospects in the laser field. For example, BeO lasers have higher efficiency and higher output power than quartz lasers.
Is Beryllium Oxide Ceramics Toxic?
2021 08/02