Sapphire Thermal Conductivity Temperature

Some etching by hot phosphoric acid and strong caustics at temperatures exceeding 600 c 800 c thermal properties.

Sapphire thermal conductivity temperature.

4 8 x 10 5. Thermal conductivity k strongly depends on temperature and it look like a bell. Sapphire properties chemical properties. Wood generally conducts better along the grain than across it.

9 0 10 6 k 1 90 orientation specific heat capacity. 25 8 w m c at 70 c. Thermal coefficient of linear expansion k 1 at 323k. 4 5 10 6 k 1 and 1000 c.

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. No significant thermal resistance due to bonded inter face was found from this measurement. Non porous unlike alumina ceramics. 23 0 w m c at 77 c.

Virtually unaffected by any solvents or acids at room temperature. Thermal conductivity w m x k at 300k. 756 j kg c at 182 c. 23 1 parallel to optical axis 25 2 perpendicular to optical axis.

Sapphire as a reference. 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. At 25 c 10 14 ohm cm. 40 w m k 298 k expansion 25 c.

2053 c 3727 f most properties useful to maximum. It is also used as an insulation material and microwave window. Resistivity ohm x cm. 6 66 x 10 6 parallel to optical axis 5 x 10 6 perpendicular to optical axis.

From 0 k it is start from zero value and in a particular temperature it reach a maximum peak. Good thermal conductivity and high heat resistance. Obtained thermal conductivity reaches κ 1 104 w m k in temperature range of t 20 30 k which is a planned operating temperature of a cryogenic mirror of the large scale cryogenic grav itational wave telescope. 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 transmission dielectric constant vs temperature parallel to c axis perpendicular to c axis 0 200 400 600 800 1000 1200 8 9 10 11 12 13 14 15 16 17 temperature c dielectric constant.