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Looking for a collaboration partner
Delicate Eco is looking for collaboration partner-window glass processor who might have interest to introduce unique, new type of the window glass in their products range.
Delicate Eco is investigating an photo-luminescent window glass opportunities. It could be very attractive looking shopping streets during the gray periods of the year and evenings. It also save the energy to be used for streets lightening, as well skyscrapers, where keeping the lights switched on is obligated.
There were several trials done by adding the oxides into glass with good success. However, the micro-crystals of the oxides are sensitive to high temperatures like glass melting require (+950-1150 C), so not all crystals are suitable. To those which can resist higher temperatures, still long exposure to high temperatures impact the structure of the crystals. Second problem is their constant distribution method allover and within the article. Both problems can be solved by using proper and especially designed flat glass manufacturing equipment, where the micro crystals are added into glass mass at very last moment, and the glass is made as multi-layer, with middle layer afterglowing.
The afterglow colors are limited to green, blue, red, orange. The most intense are blue and green colors. Afterglow effect may last up to 12 hours, with first 4 hours as the most intense. After 4 hours the intensity of afterglow drops down to 60%, by losing about 8-10% every hour. Re-charging of short exposition at UV light ( can be used small diodes of the backlight) however brings back the intensity of luminescence. Constant charging in darkness can be easily made by UV light source even as diodes or even side-shining UV-laser optical wires. The trials has shown very good results.
Photoluminescence is well known in nature. In recent years there are new discoveries, several institutes World wide are doing the investigations of photoluminescence. In basic, the photoluminescence is the effect of excited electrons by the light, until electron orbits are in excited position, the light appears (photons emission). When the energy charge field reduce, the number of photons reduce, so the light disappears.
It is well known that x-rays impact the crystal structures, but do not held any radioactivity afterwards. X-rays also activate the nucleus so the result is photons emission. This unique properties can be used to activate the nanoparticles within the glass, which will result to photoluminescence properties to be initiated, as well glass hardening, as the crystal structure of the glass will be slightly modified , its resistance improved even up to 2,5 times.
There are several minerals which has the property of luminescence, like: Sr4Al14O25 nano sized phosphor SrAl2O4:Eu2+Dy3+ and Sr4Al14O25:Eu2+Dy3+ phosphors in nano scale.Both the low-temperature product SrAl2O4:Eu2+Dy3+ and the high-temperature product Sr4Al14O25:Eu2+Dy3+ showed photoluminescence upon UV illumination with an emission peak at 480 and 505 nm, respectively. When compared to the powder obtained in conventional method, the nano sized powders revealed a blue shift in emission spectrum due to the decrease in grain size. Those two phosphors showed long persistent afterglow, and the Sr4Al14O25:Eu2+Dy3+ phosphor exhibited better afterglow property than SrAl2O4:Eu2+Dy3+ phosphor due to a deeper trap level and a higher trap concentration formed in the host material.
Some oxide crystals has photoluminescence and afterglow effects like Al O , CaO, else.
This product is patent pending.
