99% Alumina Cylindrical Crucible without Lid (Ø ≤ 30 mm)
Small cylindrical crucibles made of 99% high-purity alumina (Al₂O₃) with very low porosity, for laboratory sintering, sample melting, ash tests and high-temperature heat treatment of materials. The open, lid-free design makes samples easy to load and unload. 38 sizes are available, from Ø10 × 10 mm (0.4 mL) to Ø30 × 55 mm (23 mL).
Key Features
High purity, no contamination: no impurity release at high temperature, for accurate and stable results
Continuous working temperature up to 1600 °C, short-term peak 1750 °C; low thermal expansion and good thermal shock resistance
Chemically inert: resists most acids, alkalis and molten metals
One-piece sintered with tight dimensional tolerance and smooth, burr-free surfaces
High hardness and excellent electrical insulation
Specifications
Outer diameter (mm)
Height (mm)
Volume (mL)
20
10
1.5
30
10
3
19
35
6.5
13
24
1.5
14
45
4
16
20
3
18
26
3.5
30
55
23
12
40
3
13
16
1
20
18
3
23
27
6
25
60
20
28
17
7.5
28
58
25
30
30
13
10
10
0.4
10
20
0.8
10
40
1.5
10
50
2
10
60
2.5
11
20
1.2
12
12
0.8
15
70
5
16
28
3.5
16
50
5
16
56
8
16
70
9
18
40
7
19
58
11
20
4
0.7
20
20
3
20
50
9
25
25
8
30
5
2
30
20
7
30
25
9
30
28
12
Material: 99% Al₂O₃ | Shape: cylindrical, no lid | Continuous working temperature: ≤ 1600 °C | Peak temperature: 1750 °C | Density: ≥ 3.83 g/cm³. Slight volume shrinkage and yellowing after firing are normal.
Usage Notes
For first use, preheat at low temperature and heat up slowly to avoid cracking.
Do not use continuously above 1600 °C to prevent crystallization and performance loss.
Let the crucible cool naturally before cleaning; avoid rapid temperature changes and impacts.
Do not soak in strong acid or alkali for long periods.
This crucible has no lid; order a matching lid separately if needed.
