Glow in the dark materials

Glow in the dark materialsThe law mainly Al2O3, SrCO3, Eu2O3, Dy2O3 as raw material , adding a certain amount of flux ( such as boric acid ) , Photoluminescent Tumbled    Gravel, generally the first high temperature (1350 ℃ or so ) calcined , and then restored at a slightly lower temperature that Eu3 + becomes Eu2 +, reducing atmosphere can be 2% H2 +98% N2 to create , we can use a confined space to place active carbon . Finally, after cooling , fine grinding and sieving to obtain the product . This method is very obvious advantages of simple process , microcrystalline crystals of good quality, suitable for industrial production .Phosphorescent sand