



Saint-Gobain offers a full range of Sapphire tubes, pins & rods to meet a wide variety of demanding applications.
Our Sapphire tubes are used as a superior alternative to quartz, alumina, and silicon carbide in semiconductor processing applications. In addition, our Sapphire tubes are used in various analytical instruments in lamp applications that transmit visible, infrared or ultraviolet light, often with high intensity at high temperatures and pressures. Potentially Sapphire tubes could be used as capillary needles for laser medicine as discussed in this Journal of Biomedical Optics article.
Semiconductor Processing
(HPD CVD, PECVD, Dry Etch, Wet Etch)
Test and Analytical
Lamps and Lamp Envelopes
Tubes |
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Outer Diameter Range | Standard Wall Thickness | MAX Part Length |
.060 - .090" (1.524x2.286mm) | .010 - .025 (.254x0.635mm) | 10" (254mm) |
.091 - .275 (2.311x6.985mm) | .025 - .040 (.635x1.016mm) | 60" (1524mm) |
.276 - .750" (7.01x19.05mm) | .030 - .060" (.762x1.524mm) | 60" (1524mm) |
.751 - 1.250" (19.075x31.75mm) | .050 - .090" (1.27x2.286mm) | 60" (1524mm) |
1.260 -1.750" (32.004x44.45mm) | .060 - .090" (1.524x2.286mm) | 25" (635mm) |
Rods/Pins |
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Diameter Range | MAX Part Length | |
.050 - .125" (1.27x3.175mm) | 12" (304.8mm) | |
.125 - .290" (3.175x7.366mm) | 18" (457.2mm) |
Properties | Value |
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Density | 3.97 gm/cm3 (0.143 lb/in3) (25°C) |
Young’s Modulus | 435 GPa (63 x 106 psi) parallel to C-axis (25°C) 386 GPa (56 x 106 psi) parallel to C-axis (1000°C) |
Modulus of Rigidity (Shear Modulus) | 175 GPa (26 x 106 psi) |
Flexural Strength | 1035 MPa (150 kpsi) parallel to C-axis (25°) 760 MPa (110 kpsi) perpendicular to C-axis (25°) |
Compressive Strength | ≈2 GPa (300 kpsi) (25°) |
Hardness |
9 Mohs scale (between 20° and 25°C) 1900 Knoop parallel to C-axis |
Properties | Value |
---|---|
Transmission | UV through midwave IR (~200-5000nm) |
Uniaxial Negative Refractive Index | Ordinary ray (C-axis) No = 1.768 Extraordinary ray Ne-1.760 Birefringence: 0.008 |
Temperature Coefficient of Refractive Index | 13 X 10-6/°C (visible range) |
Spectral Emittance | 0.1 (1600°C) |
Spectral Absorption | 0.1 – 0.2cm-1 (0.66 μm, 1600°C) |
Properties | Value |
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Melting Point | 2053°C (3727°F) |
Specific Heat | 0.181 cal/gm°K (25°C) 0.300 cal/gm°K (1000°C) |
Thermal Conductivity | 0.4 watts/cm°K (25°C) 0.1 watts/cm°K (1000°C) |
Thermal Expansion Coefficient | (25 – 1000°C) 8.8 x 10-6; parallel to C-axis 7.9 x 10-6; perpendicular to C-axis |