Cte Of Alumina Ceramic

Coefficient of thermal expansion.

Cte of alumina ceramic.

Alumina ceramics are commonly subdivided according to their alumina content ranging from 80 to more than 99. Alumina is one of the most cost effective and widely used material in the family of engineering ceramics. The coefficient of thermal expansion for a material is usually specified over a temperature range because it varies depending on the temperature. Alumina aluminium oxide al 2 o 3.

Cte is usually given in units of um m c or ppm c. 1 x 10 4 to 4 x 10 4. Dielectric loss tan δ 1mhz 25 c. Coefficient of thermal expansion.

Once fired and sintered it can only be machined using diamond grinding methods. Higher purity alumina demonstrates enhanced wear and corrosion resistance creating a continuous scale of various alumina grades compositions and performance. Aluminas are used in both general use and specialized applications. The following values are given for a temperature around 20 c.

Dilatometry and thermal expansion coefficient cte testing services. Volume resistivity 25 c ω cm 10 14. Alumina oxide ceramics al2o3 is the most widely used fine ceramics material. Our dialometry testing services use netzsch dil 402 pc or similar instrument.

Maximum use temperature c. Variations are possible among various commercial grades. This material has superb material characteristics such as high electrical insulation high mechanical strength high wear and chemical resistance. It offers a combination of good mechanical properties and electrical properties leading to a wide range of applications.

Property values below are taken from literature and manufacturer sources. Alumina alpha al2o3 99 5 categories. Choose professional dilatometry and thermal expansion coefficient cte testing services from mse analytical services. Alumina also known as aluminum oxide is a hard wearing advanced technical ceramic material frequently used in a wide variety of industrial applications.

Learn about product material coefficient of thermal expansion. Aluminum oxide al 2 o 3 ceramic properties. Fine ceramics typically have a low coefficient of thermal expansion which indicates their expansion ratio due to changes in temperature. Alumina can be produced in a range of purities with additives designed to enhance properties.

Dielectric strength 6 35mm ac kv mm. Alumina ceramics al o alumina or aluminium oxide al 2 o 3 is a major engineering material.