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Sapphire Crystal
> Sapphire Crystal |
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Introduction |
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As the hardest oxide crystal Sapphire crystal is the most basic monocrystal form of Al2O3. It has many good physical and chemical properties of high strength high hardness high temperature resistance scratch-resistance anticorrosion and good performances of light transmission and electrical insulation etc. So it can be widely used in such fields with different strict requirements as national defense scientific research and civilian industry etc. |
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Standard
Specifications |
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Basic Properties
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Items |
Specification |
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Chemical Composition |
Al2O3 |
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Structure |
Hexagonal
a=4.77Å , c=13.04Å |
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Melting point |
2050℃ |
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Coefficient of expansion |
6.7 × 10-6/℃ parallel to C-axis
5.0 × 10-6/℃ perpendicular to C-axis |
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Thermal conductivity |
46.06 W/m·℃ |
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Density |
3.98 g /cm3 |
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Mohs Hardness |
9 |
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Tensile strength |
400 MPa at 25℃
275 MPa at 500℃
345 MPa at 1000℃ |
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Young’s modulus |
53 M psi |
Sapphire Specification
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Items |
Specification |
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Purity |
>99.999% |
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Orientation |
C-axis, A-axis, R-axis and Random | |
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Prisms
