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Rare Earth Trichromatic Phosphor
Rare earth trichromatic phosphor is yttrium oxide activated by
europium, alkaline earth aluminate activated by cerium and terbium
or by europium of low valence. Excited by 253.7nm ultraviolet light,
such phosphor can emit red, green and blue fluorescent light respectively,
mainly used as tree primary color components of red, green and blue.
At present, high-efficienty energy-saving fluorescent lamps are
ver popular in domestic and abroad market with the advantages of
compact structure, gentle light, convenient application, energy
saving etc.
Rare earth trichromatic phosphor is the key fluorescent materials
for the energy- saving lamp. Comparing with the traditional lamp,
it has the strongpoing of high light efficiency, adjustable color,
good colorability, ultraviolet radio residence, little light decrement
and long service life.
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1.
Appearance : White Powder
2. Chemical composition : Red powder : Y2O3 : Eu
Green powder : (Ce, Tb) MgAl11 O11O19
Blue powder : (Ba, Eu) Mgal16O27
3. Optical and Physical Properties : |
| Name |
Red Powder |
Green Powder |
Blue Powder |
Blue powder
with double peaks |
| Centre Size d50
um(max) |
5.0+/-0.5 |
7.5++/-0.5 |
6.0+/-0.5 |
6.0+/-0.5 |
| Specific surface area cm2/g
min |
2600 |
2600 |
2600 |
2600 |
| Relative b rightness, min
% |
99 |
99 |
99 |
99 |
| Chromaticity
coordinate |
X |
0.650+/-0.010 |
0.335+0.010 |
0.335+0.010 |
0.335+0.010 |
| Y |
0.345+0.010 |
0.595+0.010 |
0.080+0.005 |
0.135+0.010 |
| Main peak of emission spectrum,(nm) |
611+1 |
543+2 |
450+5 |
453,515 |
| FWHM, nm (max) - |
10 |
60 |
60 |
- |
| Distribution of particle
size,d75/d25 max |
2.2 |
2.2 |
2.2 |
- |
| Bulk density, g/cm3 (max) |
0.7 |
0.8 |
1.0 |
1.1 |
| Density, g/cm3 |
5.1+/-0.02 |
4.2+/-0.02 |
3.7+/-0.02 |
3.7+/-0.02 |
Using the above mentioned three lamp phosphor
colours as basis, we can produce lamp phosphors of different color
temperature such as 2700K, 3200K,5000K, 6400K, etc. We can also produce
lamp phosphor for neon lamps of various colors. |
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