Sapphire Thermal Conductivity Vs Temperature

Resistivity ohm x cm.

Sapphire thermal conductivity vs temperature.

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. The advantages of sapphire include. Sapphire is a very useful optical window material for use in the uv visible and near infra red. 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. Temperature coefficient of refractive index. Guild optics is a manufacturer of sapphire substrates. Applications applications of sapphire include.

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. 4 5 10 6 k 1 and 1000 c. Sapphire is used for its extreme toughness and strength. 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.

Wood generally conducts better along the grain than across it. Excellent optical characteristics uv to ir. 40 w m k 298 k. High operating temperature 1800 c chemically inert.

Single crystal sapphire is used as a material for substrates in super high frequency regions. It is also used as an insulation material and microwave window. Open source for use with acknowledgement. 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.

6 66 x 10 6 parallel to optical axis 5 x 10 6 perpendicular to optical axis. The properties of sapphire. 23 1 parallel to optical axis 25 2 perpendicular to optical axis. 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.

Good thermal conductivity and high heat resistance. Sapphire ir transmission data table 2019. 13 10 6 c 0 57 µm 20 c. High wear and scratch resistance.

23 0 w m c at 77 c. Thermal coefficient of linear expansion k 1 at 323k. Learn more about the thermal conductivity of sapphire substrates sapphire wafers sapphire properties and crystal structure from valley design.