Sapphire Thermal Conductivity Vs Temperature

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.

Sapphire thermal conductivity vs temperature.

Sapphire al 2 o 3 data sheet sapphire al 2 o 3 sds sapphire al 2 o 3 rough guide. It is also used as an insulation material and microwave window. 25 8 w m c at 70 c. Excellent optical characteristics uv to ir.

The advantages of sapphire include. Open source for use with acknowledgement. High operating temperature 1800 c chemically inert. Temperature coefficient of refractive index.

40 w m k 298 k. Applications applications of sapphire include. It turns out that thermal conductivity is directional just like refractive index in all but isotropic isometric or amorphous materials. Mechanical chemical thermal and more all listed out in plain english.

Single crystal sapphire is used as a material for substrates in super high frequency regions. The properties of sapphire. Thermal coefficient of linear expansion k 1 at 323k. Good thermal conductivity and high heat resistance.

Wood generally conducts better along the grain than across it. 23 1 parallel to optical axis 25 2 perpendicular to optical axis. Sapphire ir transmission data table 2019. Sapphire is a very useful optical window material for use in the uv visible and near infra red.

23 0 w m c at 77 c. High wear and scratch resistance. 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.

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. 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. Guild optics is a manufacturer of sapphire substrates. Resistivity ohm x cm.

Thermal conductivity w m x k at 300k. Sapphire is used for its extreme toughness and strength. 4 5 10 6 k 1 and 1000 c.