NIOSH-Approved N95/N99 Masks for about $1 Get them now!
These tall form porcelain crucibles come complete with a lid. They are glazed inside and out with the exception of the outside lower bottom and rim. Available in sizes from 5 to 250 mL. For low-form crucibles see item # CG-1883. Lids are NOT available separately.
|Item #||Capacity (mL)||Height (mm)||Top Outside Diameter (mm)|
Porcelain has excellent resistance to all reagents except hydrofluoric acid and is highly resistant to thermal shock while having a very low coefficient of expansion.
The average coefficient of expansion from 20 to 200 °C is 3.56 x 10-5 gradually increasing to 4.69 x 10-5 at 1000 °C. To prevent thermal stress cracks on porcelainware do not exceed a heating/cooling rate of 200 °C per hour.
To prolong the life of porcelain products:
- Follow gradual heating/cooling rates
- Use an oven or hot plate and an intermediate step when quicker heating/cooling rates are required
- Avoid contact of heated ware with a cold surface
- Carefully inspect labware prior to each use and do not use any product that appears defective.