Sapphire Thermal Conductivity Vs Temperature

High operating temperature 1800 c chemically inert.

Sapphire thermal conductivity vs temperature.

Temperature coefficient of refractive index. Applications applications of sapphire include. Single crystal single crystal sapphire is used for various kinds of vacuum equipment windows in excellent thermal conductivity at low temperatures allows single crystal sapphire as a. 40 w m k 298 k.

The properties of sapphire. Mechanical chemical thermal and more all listed out in plain english. Open source for use with acknowledgement. Guild optics is a manufacturer of sapphire substrates.

25 8 w m c at 70 c. Thermal coefficient of linear expansion k 1 at 323k. Thermal conductivity on the other hand is a ratio of the flow of heat through a given thickness of material to the temperature difference across this thickness. Sapphire is a notable example of variable thermal conductivity based on orientation and temperature with 35 w m k along the c axis and 32 w m k along the a axis.

Resistivity ohm x cm. Excellent optical characteristics uv to ir. It is also used as an insulation material and microwave window. The advantages of sapphire include.

Good thermal conductivity and high heat resistance. Thermal electrical and optical ir transmission vs wavelength 500 c 20 c 1000 c 0 0 2 3 4 5 6 10 20 30 40 50 60 70 80 90 100 wavelengths microns. Wood generally conducts better along the grain than across it. Sapphire ir transmission data table 2019.

Sapphire al 2 o 3 data sheet sapphire al 2 o 3 sds sapphire al 2 o 3 rough guide. Single crystal sapphire is used as a material for substrates in super high frequency regions. Learn more about the thermal conductivity of sapphire substrates sapphire wafers sapphire properties and crystal structure from valley design. 13 10 6 c 0 57 µm 20 c.

6 66 x 10 6 parallel to optical axis 5 x 10 6 perpendicular to optical axis. 23 1 parallel to optical axis 25 2 perpendicular to optical axis. It turns out that thermal conductivity is directional just like refractive index in all but isotropic isometric or amorphous materials. Sapphire is a very useful optical window material for use in the uv visible and near infra red.

4 5 10 6 k 1 and 1000 c. Sapphire is used for its extreme toughness and strength. Excellent thermal conductivity at low temperatures allows single crystal sapphire as a transparent material to be used in many diverse fields requiring thermal conduction and heat radiation.