Volatile Crucibles with Pips-Lids

Volatile Crucibles with Pips-Lids

Volatile Crucibles with Pips 25 x 38mm

Volatile crucibles with pips are specialized quartz or porcelain crucibles with well-fitting lids used primarily to determine the volatile matter content of substances like coal and coke. The “pips” are small protrusions on the lid that create a tight seal with the crucible, crucial for preventing the loss of volatile components during the heating process, thus ensuring accurate measurement of volatile content in experiments.

Volatile Crucibles with Pips-Lids Key Uses and Characteristics
Volatile Matter Testing:
Their primary purpose is in standardized tests, such as those to ASTM D3175, to determine volatile matter in coal and coke.
High-Purity Materials:
Volatile crucibles are also essential for applications requiring the production of high-purity materials like semiconductors and advanced ceramics, due to their resistance to chemical attack and high thermal stability.
Controlled Heating:
The well-fitting lid, often with pips to create a snug seal, is critical for controlling the crucible’s atmosphere. This helps contain substances and reduce solvent loss or material evaporation during high-temperature experiments.
Chemical Analysis:
They are used in chemical analysis, research, experiments, and quality control to measure the loss of mass from a substance upon heating.
Crystal Growth:
Their properties make them ideal for crystal growth processes.
High Temperatures:
These crucibles are designed to withstand high temperatures, making them suitable for processes that involve incineration, ashing, and high-temperature heating.
Why the “Pips” Matter
Tight Seal:
The pips on the lid create a tight, interlocking seal with the crucible, preventing the escape of volatile substances.
Accurate Measurement:
This tight seal is crucial for ensuring that the mass loss measured is due to volatile components and not from accidental loss due to evaporation or spillages.
Standardization:
The precise fit and the presence of these pips help standardize the testing conditions for volatile matter determination.

Volatile Crucibles with Pips-Lids

Volatile Crucibles with Pips, 25 x 38mm

Volatile Crucibles with Pips-Lids

A portion of pulverized coal 1g sample is heated out of contact with air in a Muffle Furnace at 900 °C for 7 min.

The percentage mass fraction of volatile matter is calculated from the loss in mass of the test portion after deducting the loss in mass due to moisture.

• Crucible, cylindrical, with a well-fitting lid, both of fused silica.
• The crucible with lid have a mass between 10 g and 14 g
• The fit of the lid on the crucible is critical to the determination and a lid shall be selected to match the crucible so that the horizontal clearance between them is no greater than 0,5 mm. After selection, the crucible and the lid shall be ground together to give smooth surfaces and then be given a common distinguishing mark.
• The Crucible lid base is solid 1.5mm thick.

Volatile Crucibles with Pips-Lids