Tosoh ED-H Optical Silica Glass

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Tosoh ED-H Optical Silica Glass
Categories:	Other Engineering Material
Material Notes:	ED-H ingots are manufactured from high-purity SiCl4 in a VAD process. ED-H ingots have a typical purity that exceeds the detection limit of 10ppb in all elements, and are virtually free of bubbles and inclusions. Thanks to an OH content less than 100ppm, ED-H material exhibits superior transmission characteristics in the deep UV and is a material of choice for VUV applications down to 170nm. Features: Good homogeneity with 3D striae free Application: : High precision optics Information provided by Tosh Corporation
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Physical Properties	Metric	English	Comments

Density	2.20 g/cc	0.0795 lb/in³
Viscosity	13000 cP @Temperature 200 °C	13000 cP @Temperature 392 °F

Mechanical Properties	Metric	English	Comments
Hardness, Vickers	907.5	907.5
Tensile Strength	49.0 MPa	7110 psi
Modulus of Elasticity	74.0 GPa	10700 ksi	Young's
Flexural Strength	65.0 - 95.0 MPa	9430 - 13800 psi
Compressive Strength	1130 MPa	164000 psi
Poissons Ratio	0.18	0.18
Shear Modulus	31.0 GPa	4500 ksi

Electrical Properties	Metric	English	Comments
Volume Resistivity	5.00e+17 ohm-cm	5.00e+17 ohm-cm
Surface Resistance	8.00e+15 ohm	8.00e+15 ohm
Dielectric Constant	3.9 @Frequency 5.00e+8 Hz	3.9 @Frequency 5.00e+8 Hz
Dielectric Loss Index	<= 0.0010 @Frequency 5.00e+8 Hz	<= 0.0010 @Frequency 5.00e+8 Hz

Thermal Properties	Metric	English	Comments
CTE, linear	0.520 µm/m-°C @Temperature 30.0 - 100 °C	0.289 µin/in-°F @Temperature 86.0 - 212 °F
	0.580 µm/m-°C @Temperature 30.0 - 200 °C	0.322 µin/in-°F @Temperature 86.0 - 392 °F
Specific Heat Capacity	0.749 J/g-°C	0.179 BTU/lb-°F
Thermal Conductivity	1.38 W/m-K	9.58 BTU-in/hr-ft²-°F
Softening Point	1720 °C	3130 °F	(?=10^7.6)*2
Annealing Point	1190 °C	2170 °F	(?=10^13)
Strain Point	1090 °C	1990 °F	(?=10^14.5)

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PTOSOH021 / 306476

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