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Magnesium Oxide (MgO) crucibles have a fine-grained structure with low open porosity. The density is 3.45 g/cm3 with less than 1% open porosity.
This material contains 2% Yttrium Oxide (Y2O3) to facilitate the sintering of Magnesium. Yttrium Oxide is completely inert and behaves similarly to MgO in all applications.
Magnesia crucibles have a mechanical strength and thermal shock resistance lower than those of Alumina crucibles. They require heating and cooling to be as homogeneous as possible.
They resist up to around 2000˚C.
Chemical analysis
- MgO + Y2O3 99.38 %
- CaO 0.38 %
- SiO2 0.4 %
- Al2O3 0.03 %
- Fe2O3 0.07 %
- B2O3 0.01 %
|
Ext. Diam. (mm) |
H (mm) |
Vol. (cm3) |
Ext. Diam. (mm) |
H (mm) |
Vol. (cm3) |
Ext. Diam. (mm) |
H (mm) |
Vol. (cm3) |
||
|
12.7 |
25.4 |
1 |
38.1 |
76.2 |
63 |
76.2 |
101.6 |
380 |
||
|
18 |
40.6 |
5 |
44.4 |
88.9 |
99 |
76.2 |
146.1 |
547 |
||
|
19.1 |
25.4 |
4 |
50.8 |
50.8 |
75 |
88.9 |
152.4 |
804 |
||
|
25.4 |
25.4 |
7 |
50.8 |
88.9 |
135 |
91.9 |
152.4 |
865 |
||
|
25.4 |
31.8 |
9 |
50.8 |
152.4 |
234 |
95.3 |
152.4 |
932 |
||
|
25.4 |
76.2 |
24 |
57.2 |
88.9 |
176 |
101.6 |
114.3 |
777 |
||
|
31.8 |
31.8 |
16 |
63.5 |
76.2 |
189 |
101.6 |
152.4 |
1044 |
||
|
31.8 |
50.8 |
46 |
63.5 |
139.7 |
354 |
114.3 |
152.4 |
1343 |
||
|
31.8 |
63.5 |
56 |
69.9 |
88.9 |
274 |
127 |
203.2 |
2254 |
Side thickness of 2.5 to 4 mm depending on the crucible diameter.