Continental Trade Sp. z o. o.

Technical glass

Quartz glass rods

Quartz glass rods

Silica rods are made of high purity quartz sand and crystal flour. The outer surface and inner quality of our products can meet international advanced standard. The surface is smooth and clear. The properties of the rods are: high purity (domestic material SiO2>99.8%, imported material SiO2>99.98%).

Quartz rods properties:

  • high resistance to acids, except for hydrofluoric acid (HF),
  • fire resistance(softening point 1650°C),
  • low coefficient of thermal expansion (5.5x10-7 / °C),
  • excellent electrical property. It is widely used in the fields of electronics, semiconductors and optical fibers etc.
JGS quartz glass rods

We offer quartz rods of different diameters made of various types of quartz glass. Typically rods are made of the following types of quartz glass (see the properties of the JGS type quartz glass described here):

  1. JGS-1 (Extreme UV optical quartz glass). It is a high-purity optical quartz glass made by oxyhydrogenflame melting. Its satisfactory UV light transmission performance surpass all the other glass types in particular in the shortwave UV zone and can achieve a 90% transmission rate at the wavelength of 185 μm. Hence it is an ideal choice for applications in the wavelength range of 185-2500 nm !

  2. JGS-2 (UV optical quartz glass). It is an optical quartz glass made by oxyhydrogen flame melting and is suggested for applications in the wavelength range of 220-2500 nm !

  3. JGS-3 (Infrared quartz glass). It has a good performance of infrared light transmission with a transmittance of over 85%. It is recommended for applications in the wavelength range of 260-3500 nm !
  4. Ozone free quartz.  It is clear quartz tube doped with Ti. Has a strong ability to prevent dense UV radiation but release no ozone.  Ozone-free quartz tubing is clear, with cut surface slight purple. The product blocks wavelength < 220 nm, while transmit over 70% in 253.7 nm. Good for all kinds of germcidal lamps.


Typical rod length is 1240 mm, but usually we deliver it cropped according to customer requirements.

Ozone free quartz - additional information

Chemical composition (ppm by weight, analysis via direct spectrometer reading)

25 1.5 2.5 2.5 0.6 2.3 0.5 0.1 0.5 0.01 0.2 0.1 <10

Physical properties

Density (at 20 °C) kg/m3 *103 2.2
Ceofficient of expansion (in range 25-300 °C) 1/°C *10-6 0.56
Softening point °C 1630
Annealing point °C 1180
Strain point °C 1070
Youngs modulus Pa * 105 7.3

Spectral transmission at 1.0 mm thickness

Wavelength[nm] 185 <220 230-280 550 590 780
Transmittance% 0 0 ≥85 ≥90 ≥92 ≥92

While every attempt has been made to verify the source of the information, no responsibility is accepted for accuracy of data.

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