Thermal Properties Of Alumina Ceramics

High purity alumina is usable in both oxidizing and reducing atmospheres to 1925 c.

Thermal properties of alumina ceramics.

The results showed that the alumina lanthanum hexaaluminate ceramic composites have sufficient low thermal conductivity to be used in thermal barrier coatings. Generally alumina is a type of fine ceramics with excellent mechanical thermal electrical magnetic and scientific properties. In contrast to metals ceramics have low thermal conductivity due to ionic covalent bonding which does not form free electrons. This material has superb material characteristics such as high electrical insulation high mechanical strength high wear and chemical resistance.

On heating ceramics expand this is generally known as thermal expansion. High heat resistance and high thermal conductivity. Its high hardness excellent dielectric properties refractoriness and good thermal properties make it the material of choice for a wide range of applications. Property minimum value s i maximum value s i units s i minimum value imp.

Properties of alumina the table below shows typical properties of some commonly available alumina grades alongside zirconia toughened alumina. From this we know that ceramics conduct heat but withstand high. The greater the amount the higher the resistance. Alpha phase alumina is the strongest and stiffest of the oxide ceramics.

High strength and high hardness. The thermal properties of the alumina hexaaluminate ceramic composites were compared as a function of temperature and lanthanum hexaaluminate content 20 80 vol. Aluminium oxide al2o3 or alumina is one of the most versatile of refractory ceramic oxides and finds use in a wide range of applications. Thermal expansion is due to conduction of heat.

One of the alumina materials we highly recommend is 99 6 or higher purity alumina required for the semiconductor manufacturing process. Other 9 3 9 6 dielectric strength kv mm 26 31 properties shown are. λ of alumina 47 btu lb ºf 6 3 w m k.