99% Alumina Cylindrical Crucible (Uncovered), Ø35–50 mm
Uncovered cylindrical crucibles made of ≥99% high-purity alumina (99 ceramic). They are used for sintering, ashing, melting and heat treatment in muffle furnaces and high-temperature kilns. 39 sizes are available, from Ø35 × 6 mm (3 mL) to Ø50 × 100 mm (145 mL).
Key Features
99% high-purity alumina: ultra-low impurity content and no impurity release at high temperature, so samples stay uncontaminated.
Heat resistance: 1600 °C long-term working temperature and 1750 °C short-term maximum, with no softening or deformation.
Chemical stability: resists acids, alkalis and molten metal corrosion.
High strength and thermal shock resistance: the dense, one-piece ceramic structure resists cracking.
Smooth, pore-free inner and outer walls resist sample adhesion and are easy to clean.
Specifications
Parameter
Value
Material
99% high-purity alumina
Style
Uncovered cylindrical crucible
Diameter range
35–50 mm (see size options)
Long-term working temperature
≤ 1600 °C
Short-term max. temperature
1750 °C
Density
3.98 g/cm³
Usage Notes
Pre-fire at 1000 °C for 2 hours before first use.
Heat and cool at ≤ 5 °C/min. Avoid sudden temperature changes.
Avoid long-term contact with strongly alkaline melts.
Let the crucible cool naturally. Never quench a hot crucible in cold water.
