clairekastelan
HMM: Glow-in-the-dark - Europium (Eu)
What a happy coincidence! I bought these glow-in-the-dark pebbles for a mosaic I have planned for our front courtyard and out of curiosity had a look at the Tech Data sheet to see why they glowed. Doped Europium was the reason. (Doped I think meaning that impurities have been added).
According to the brilliant periodic table website we were directed to, green and aqua are europium doped strontium aluminate, the brightest of all the modern phosphorescent powders, blue is an alkali earth silicate, while red and orange are older, noticeably less bright zinc sulfides.
HMM: Glow-in-the-dark - Europium (Eu)
What a happy coincidence! I bought these glow-in-the-dark pebbles for a mosaic I have planned for our front courtyard and out of curiosity had a look at the Tech Data sheet to see why they glowed. Doped Europium was the reason. (Doped I think meaning that impurities have been added).
According to the brilliant periodic table website we were directed to, green and aqua are europium doped strontium aluminate, the brightest of all the modern phosphorescent powders, blue is an alkali earth silicate, while red and orange are older, noticeably less bright zinc sulfides.