I have noticed alot of posts about hydrogenation, both with H gas, and with the microwave CHT method. I have noticed one of the main dangers or concearns with the use of this method is the explosion of the reaction flask, and accordingly the hydrogen within. My solution top this, and I asume a professional labs solution is to use some thing that has little likely hood of exploding, is quartz glass flasks. For the microwave method it appears there would be a better transference of microwaves anyhow here is something I found on quartz glass that may help out in your decision. Also they make almost every piece of lab glassware from quartz, and it bearly costs more.
Cy
PROPERTY:
Density 2.2 gm/cm3
Hardness 5.5–6.5 Mohs’ Scale
Design Tensile Strength 7,000 psi
Design Compressive Strength 160,000 psi
Bulk Modulus 5.3 x 106 psi
Rigidity Modulus 4.5 x 106 psi
Young’s Modulus 10.5 x 106 psi
Poisson’s Ratio .17
Coefficient of Thermal Expansion 5.5 x 10-7 cm/cm • °C(20°C – 320°C)
Thermal Conductivity (20° C) 3.3 x 10-3 gm cal
Specific Heat (20°) .16gm cal/gm
Softening Point 1683°C
Annealing Point 1215°C
Strain Point 1120°C
Electrical Resistivity 7(107) ohm • cm 350°C
Dielectric Properties (20°C and 1 MHz) Constant 3.75 3.75
Strength 5 x 107 volts/mil
Loss Factor Less than 4 x 10-4
Dissipation Factor Less than 1 x 10-4
Index of Refraction 1.4585 1.4585
Velocity of Sound-Shear Wave 3.75 x 105 cm/sec
Velocity of Sound-Compression Wave 5.90 x 105 cm/sec
Sonic Attenuation Less than 11 db/m • MHz
Permeability Constants (cm • mm/cm • sec • cm of Hg – 700°C/973°K
Helium 210 x 10-10
Hydrogen 21 x 10-10
Deutrium 17 x 10-10
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