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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
<0.2   Fe 0.2
Na  0.7    Ni  0.7
Mg  0.1    Cu 0.05
Al 14   As <0.002  
<0.2    Cd  <0.01
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


Fused Quatz Avarage Transmittance Curves
Index of Refraction of type GE 124 fused quartzIR Transmission of type GE 124 fused quartz

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

Internal Fricton of type GE 124 fused quartzShear Modulus of type GE 124 fused quartz

Internal Damping of type GE 124 fused quartz Young's Modulus of type GE 124 fused quartz

Modulus of Rapture of type GE 124 fused quartzPoisson's Ratio of type GE 124 fused quartz

Hardness of type GE 124 fused quartz

Thermal Properties

thermal Diffusivity of type GE 124 fused quartzCoefficient of Expansion of type GE 124 fused quartz

Heat Capacity of type GE 124 fused quartz
Thermal Conductivity of type GE 124 fused quartz

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

xDielectric Breakdown Voltage vs. Frequency of type GE 124 fused quartz

xVolume Conductivity type GE 124 fused quartz

Reistivity type GE 124 fused quartzDielectric Constant of type GE 124 fused quartz

Acknowledgment: Momentive Corporation for providing technical data

TSB 100815-1 Technical information for type GE 124 fused quartz Revision 1



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