Technical information for type GE 124 fused quartz
Order Micro-Tec quartz microscope slides and coverslips
The Micro-Tec quartz microscope slide, quartz coverslips and quartz discs are made from high purity type GE 124 fused quartz. Fused quartz is an amorphous glassy material. The purity is 99.995% or better.
Chemical composition
Fused quartz consists mainly of SiO2 with some trace elements. The typical chemical trace element composition of type GE 124 fused quartz contains the following elements in ppm (by weight)| Li | 0.6 | Mn | <0.05 | |
| B | <0.2 | Fe | 0.2 | |
| Na | 0.7 | Ni | 0.7 | |
| Mg | 0.1 | Cu | 0.05 | |
| Al | 14 | As | <0.002 | |
| P | <0.2 | Cd | <0.01 | |
| K | 0.6 | Zr | 0.8 | |
| Ca | 0.4 | Sb | <0.003 | |
| Ti | 1.1 | OH | 5 | |
| Cr | <0.05 |
Optical Properties
The typical transmission curve shows the transmission for the UV to IR range. UV microscopy is mostly in the 250-290nm range where the material exhibits excellent transmittance
Physical and mechanical properties
The mechanical properties of fused quartz are similar to those of other glasses, although it has higher temperature stability, thermal shock resistance and higher compressive strength.Parameter |
Typical value |
Density |
2.2 x 103 kg/m3 |
Hardness |
5.5 - 6.5 Moh's scale |
Tensile strength |
4.8 x 107 Pa |
Compressive strength |
>1.1 x 109 Pa |
Bulk modulus |
3.7 x 1010 Pa |
Rigidity modulus |
3.1 x 1010 Pa |
Young's modulus |
7.2 x 1010 Pa |
Poisson's ratio |
0.17 |
Thermal expansion coefficient (20-230°C) |
5.5 x 10-7cm/cm.°C |
Thermal conductivity (20°C) |
1.4 W/m.°C |
Specific Heat (20°C) |
670 J/kg.°C |
Softening point |
1683 °C |
Annealing point |
1215 °C |
Strain point |
1120 °C |
Refraction Index |
1.46 |
Constringence (Nu value) |
67.56 |
Velocity of sound shear wave |
3.75 x 103 m/s |
Velocity of sound compression wave |
5.90 x 103 m/s |
Sonic attentuation |
< 11db/m MHz |
Permeability constants (700°C) |
Cm3mm/cm2 sec.cm of Hg) |
Helium |
210 x 10-10 |
Hydrogen |
21 x 10-10 |
Deuterium |
17 x 10-10 |
Neon |
9.5 x 10-10 |
Thermal Properties
Electrical Properties
Fused quartz is preferred to glass for electrical insulation. Both electrical insulation and microwave transmission properties are retained at very high temperatures and a wide range of frequencies.Electrical resistance (350°C) |
7 x 107 ohm cm |
Specific resistivity (20°C) |
10-18 ohm/cm3 |
Dielectric properties (20°C and 1Mhz) |
|
Constant |
3.75 |
Strength |
5 x 107 V/m |
Loss factor |
< 4 x 10-4 |
Dissipation factor |
< 1 x 10-1 |
Acknowledgment: Momentive Corporation for providing technical data
TSB 100815-1 Technical information for type GE 124 fused quartz Revision 1
