Thermal Conductivity Of Beryllium Oxide Ceramic

When small components require great strength bw 1000 ceramic is the optimum choice.

Thermal conductivity of beryllium oxide ceramic.

Beo ceramic is utilized for its proven superior properties and its cost effectiveness unmatched by aluminum nitride aluminum oxide boron nitride silicon carbide or any ceramic. Beryllium oxide is widely used in aerospace nuclear power metallurgical engineering electronics industry rocket manufacturing and so on. A 20 lower dielectric constant than alumina and aluminum nitride offers advantages in the high frequency field. Although beryllium oxide is toxic beryllium oxide ceramics are not toxic.

Beryllium oxide versus aluminum nitride. It is ideal for very small fragile parts that will endure high levels of stress during the life cycle of the product. At present the thermal conductivity of the prepared beo ceramics can reach 280 w m k which is 10 times higher than that of aluminum oxide al2o3 ceramics. Analysis of publications shows that beo ceramic in the range 300 500 k exhibits the highest thermal conductivity among all ceramic materials used in.

When thermal conductivity and heat dissipation are critically important considerations the differences between beryllium oxide beo also known as beryllia and aluminum nitride aln can mean the difference between long term performance and early failure. Beryllium oxide is widely used in the fields of special metallurgy vacuum electronic technology nuclear technology microelectronics and photoelectron technology due to its high thermal conductivity high insulation low dielectric constant low medium loss and good. For comparison the thermal conductivity of beryllium oxide at room temperature is 285 w mk for copper it is 400 w mk for aluminum nitride it is 180 w mk and for diamond it is 2000 w mk. The thermal conductivity of beo is extremely high in comparison with other ceramics particularly below 300 c.

Prospects are discussed for the use of beo ceramic in electronic and other fields of technology and special instrument building. Bw3250 beo ceramic offers higher thermal conductivity than bw 1000 ceramic but with lower flexural strength. This colourless solid is a notable electrical insulator with a higher thermal conductivity than any other non metal except diamond and exceeds that of most metals. As an amorphous solid beryllium oxide is white its high melting point leads to its use as a refractory material.

It is used in high technology ceramics electronic heat sinks electrical insulators high power devices high density electrical circuits microwaves x ray windows nuclear reactor fuels and for various aerospace and military.