Chemically dissolve yttrium oxide in hydrochloric acid and dilute to 100-150g/L (calculated as Y2O3), heat the solution to 70-80°C, and then precipitate with 48% hydrofluoric acid. The precipitate is washed, filtered, dried, crushed, and vacuum dehydrated to obtain yttrium fluoride.
1. Properties: cubic crystal system,White powder
2. Density (g/mL, 25/4ºC): 4.01
3. Relative vapor density (g/mL, air=1): not determined
4. Melting point (ºC): 1152
5. Boiling point (ºC, normal pressure): 2230
6. Boiling point (ºC, 5.2kPa): not determined
7. Refractive index: not determined
8. Solubility: insoluble in water, hardly soluble in hydrochloric acid, nitric acid and sulfuric acid, but soluble in perchloric acid.
Yttrium Fluoride Particles Shape:
| Yttrium Fluoride Particles : powder/ Granule/ Custom-made |
|
Impurity |
3N |
4N |
5N |
|
|
Non-rare earth impurities maximum (ppm) |
Fe |
100 |
10 |
5 |
|
SiO2 |
100 |
50 |
30 |
|
|
CaO |
200 |
50 |
30 |
|
|
Cl |
200 |
200 |
200 |
|
|
Loss on ignition% |
1.0 |
1.0 |
1.0 |
|
|
Rare earth impurities maximum (ppm) |
La2O3 |
100 |
10 |
1 |
|
CeO2 |
100 |
10 |
1 |
|
|
Pr6O11 |
100 |
10 |
1 |
|
|
Nd2O3 |
100 |
10 |
1 |
|
|
Sm2O3 |
100 |
10 |
1 |
|
|
Eu2O3 |
100 |
10 |
1 |
|
|
Gd2O3 |
100 |
10 |
1 |
|
|
Tb4O7 |
100 |
10 |
1 |
|
|
Dy2O3 |
100 |
10 |
1 |
|
|
Ho2O3 |
100 |
10 |
1 |
|
|
Er2O3 |
100 |
10 |
1 |
|
|
Tm2O3 |
100 |
10 |
1 |
|
|
Yb2O3 |
100 |
10 |
1 |
|
|
Lu2O3 |
100 |
10 |
1 |
|
Used to prepare rare earth crystal laser materials, up-conversion luminescent materials, fluoride glass optical fibers and fluoride optically active glass. Used in the lighting source to manufacture arc lamp carbon electrodes. It is the raw material for preparing metal yttrium by electrolysis.
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