Medium-High Purity Clear Quartz Glass EN08
EN08 is mechanically drawn electrically fused clear quartz glass. It uses natural quartz as raw material with SiO2 ≥99.98%. It is available in tube, rod and plate.
In semiconductor and photovoltaic (PV) industry, the tube, rod and plate are used in quartz washing tank and quartz boat for wafer cleaning and so on where the working temperature is below 800℃. Due to the elevated sodium (Na), EN08 glass can not be employed in high-temperature semiconductor and photovoltaic (PV) industry where the temperature is over 800℃, or the sodium will cause the glass devitrification.
In lighting: because of its medium-high purity, EN08 has an excellent transmission in both deep UV range of 100-200nm wavelength and UVC range of 200-280nm wavelength. By vacuum annealing, the OH of EN08 can be lowered below 20ppm. So this item is a good material in ozone producing and UVC disinfection field.
The glass tube can be supplied in the range between 6mm-40mm outer diameter. The rod is available between 1mm-25mm outer diameter. The plate is available of maximum size 2000x800x5-7mm.
Main application is as follows:
Typical trace elements and OH content in quartz glass (ppm by weight oxide)
|EN08UB||OH≤150ppm||sleeve (jacket) of low pressure ozone producing UV germicidal lamps and ozone free UVC germicidal lamps， fiber optics.|
|EN08EB||OH≤20ppm||low temperature semiconductor and PV industry, lamps tube of low pressure ozone producing UV germicidal lamps.|
Hydroxyl (OH) Content:
|coefficient of expansion||25-300℃||cm/cm.℃||5.5 x 10-7|
|Young’s modulus||Pa||7.2 x 1010|
|density||kg/m2||2.2 x 103|
|tensile strength||Pa||4.8 x 107|
|compressive strength||Pa||>1.1 x 109|
|loss tangent||20℃ and 1MHz||<2 x 10-4|
|dielectric constant||20℃ and 1MHz||3.75|
|resistivity||350℃||ohm.cm||7.0 x 109|
|insulation strength||V/m||5.0 x 107|
|index of refraction||1.459|
|transmittance||wall thickness 1.5mm||see below form|