Thermal Conductivity Of Beryllium Oxide Ceramic

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.

Thermal conductivity of beryllium oxide ceramic. Beryllium oxide is widely used in aerospace nuclear power metallurgical engineering electronics industry rocket manufacturing and so on. It is ideal for very small fragile parts that will endure high levels of stress during the life cycle of the product. 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. 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.

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. Beryllium oxide beo also known as beryllia is an inorganic compound with the formula beo. Analysis of publications shows that beo ceramic in the range 300 500 k exhibits the highest thermal conductivity among all ceramic materials used in. Beryllium oxide is widely used in industry due to its low density and high thermal and electrical conductivity.

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. As an amorphous solid beryllium oxide is white its high melting point leads to its use as a refractory material. 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. Although beryllium oxide is toxic beryllium oxide ceramics are not toxic.

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. Prospects are discussed for the use of beo ceramic in electronic and other fields of technology and special instrument building. A 20 lower dielectric constant than alumina and aluminum nitride offers advantages in the high frequency field. When small components require great strength bw 1000 ceramic is the optimum choice.

Beryllium oxide versus aluminum nitride.