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Phosphorescent materials were discovered in the 1700s, and people have been studying them and making improvements over the centuries.The development of strontium aluminate pigments in 1993 was spurred on by the need to find a substitute for glow-in-the-dark materials with high luminance and long phosphorescence, especially those that used promethium.
Phosphorescent pigments performance, in visible light, in dark, after 4 minutes in dark - zinc sulfide (left) and strontium aluminate (right) based materials Super-LumiNova is a brand name under which strontium aluminate –based non- radioactive and nontoxic photoluminescent or afterglow pigments for illuminating markings on watch dials ...
Strontium aluminate based pigments are now used in exit signs, pathway marking, and other safety related signage. [ 22 ] Zinc sulfide (left) and strontium aluminate (right), in visible light, in darkness, and after 4 minutes in the dark.
The invention was patented in 1994 by Nemoto & Co., Ltd. and licensed to other manufacturers and watch brands that use different (brand) names. [2] These strontium aluminate–based phosphorescent pigments, often called lume, operate like a rechargeable light battery. After sufficient activation by sunlight, fluorescent, LED, UV (blacklight ...
Strontium aluminate is frequently used in glow in the dark toys, as it is chemically and biologically inert. [69] Strontium salts are added to fireworks in order to create red colors. Strontium carbonate and other strontium salts are added to fireworks to give a deep red colour. [70] This same effect identifies strontium cations in the flame test.
Radioluminescent paint is a self-luminous paint that consists of a small amount of a radioactive isotope (radionuclide) mixed with a radioluminescent phosphor chemical. The radioisotope continually decays, emitting radiation particles which strike molecules of the phosphor, exciting them to emit visible light.
However, the development of strontium oxide aluminate, with a luminance approximately 10 times greater than zinc sulfide, has relegated most zinc sulfide based products to the novelty category. Strontium oxide aluminate based pigments are now used in exit signs, pathway marking, and other safety related signage.
Europium is also used in the manufacture of fluorescent glass, increasing the general efficiency of fluorescent lamps. [10] One of the more common persistent after-glow phosphors besides copper-doped zinc sulfide is europium-doped strontium aluminate. [57] Europium fluorescence is used to interrogate biomolecular interactions in drug-discovery ...
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