Gold annealing crucibles nº 0
January 25, 2022Borosilicate beaker BBW-36
June 29, 2024Borosilicate beaker BBW-49
Category: Parting and annealing accessories
Description
Borosilicate beaker BBW-49 for the cupellation parting process with nitric acid according to ISO11426
.Dimensions of the beaker are: Ø 165 x Ø 155 x H 100 mm and it is specially designed to fit the quarz parting and annelling basket QBR49.
Main characteristics of the beaker are:
- Withstands concentrated / boiling nitric acid attack.
- Low thermal expansion coefficient (αL = 3.3·10-6·K-1). Three times less linear expansion than ordinary glass.
- Low density and low thermal mass (Specific heat capacity 0.83 J / g·K)
- Resists temperatures up to 500ºC
- Softening point 820º C
- Thermal shock: Resists temperature differentials of up to165ºC (Ordinary glass resists temperature differential of only 37ºC)
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