|Place of Origin:||China|
|Model Number:||10 piece|
|Minimum Order Quantity:||Free samples Available|
|Packaging Details:||Discreet package or as required|
|Delivery Time:||3-6 working days|
|Payment Terms:||Western Union, MoneyGram, T/T,Bitcoins|
|Supply Ability:||500 kg / month|
|Packing:||Discreet Packing For Customs Pass Guaranteed||Catalogue:||Pharmaceutical Processing Equipment|
chemistry lab equipment
Glass Stirring Rod Pharmaceutical Processing Equipment Glass Rod
6 x 200 mm - 10 pcs - Very high chemical resistance
Our borosilicate glass is highly resistant to water, neutral and acid solutions, concentrated acids and acid mixtures, and to chlorine, bromine, iodine and organic substances. Its chemical resistance is superior to that of most metals and other materials, even during prolonged periods of exposure and at temperatures above 100 °C.
Only hydrofluoric acid, concentrated phosphoric acid and strong alkali cause appreciable surface removal of the glass (glass corrosion) at elevated temperatures (>100 °C).
High usage temperature:
The maximum permissible operating temperature for our Glass Stirring Rod is 500 °C. Above a temperature of 525 °C the glass begins to soften and above a temperature of 860 °C it changes to the liquid state.
It can be cooled down to the maximum possible negative temperature and is therefore suitable for use with liquid nitrogen (approx. – 196 °C). During such use/ freezing. In general, the products are recommended for use down to – 70 °C. During thawing ensure that the temperature difference does not exceed 100 K.
Minimal thermal expansion & high resistance to thermal shock:
This glassware is characterised by high resistance to changes in temperature (ΔT=100 K). With its very low coefficient of linear expansion (3.3 x 10–6 K–1), literally no tension is built up in the article, when the temperature changes rapidly. Therefore, it does not crack or shatter, when boiling water is filled in.
10 pcs 6 x 200 mm glass stirring rod
|Coefficient of mean linear thermal expansion α (20 °C; 300 °C)
acc. to DIN ISO 7991
|3.3 x 10-6 K-1|
|Transformation temperature T g||525 °C|
|Temperature of the Glass at viscosity η in dPa x s:
1013 (annealing point)
|107.6 (softening point)||825 °C|
|104 (working point)||1260 °C|
|Maximum short-time working temperature||500 °C|
|Density ρ at 25 °C||2,23 g x cm-3|
|Modulus of elasticity E (Young´s modulus)||64 x 103N x mm-2|
|Poisson´s ratio µ||0,20|
|Thermal conductivity λw at 90 °C||1,2 W x m-1 x K-1|
|Temperature for the specific electrical resistance of 108 Ω x cm
(DIN 52 326) t k 100
|Logarithm of the electrical volume resistance (Ω x cm)||at 250 °C 8/at 350 °C 6,5|
|Dielectrical properties (I MHz, 25 °C) Dieletric constant ε||4,6|
|Dielectric loss factor tan δ||37 x 10 -4|
|Refractive index(λ = 587.6 nm) nd||1,473|
|Stress-optical coefficient (DIN 52 314) K||
4,0 x 10-6 mm2 x N-1
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