ABSTRACT
The normal purities (analytical reagent grade, luminescent grade, etc.) of commercially available starting materials are good enough to prepare almost every phosphor mentioned in this cookbook. Only some CaS-type phosphors are exceptions. Some impurities (e.g., Mn) show up in the CaS-type phosphors in concentrations as low as 1 ppm. Consequently, harmful impurities (mainly metals like Mn, Fe, etc.) in the starting materials are better kept below this level. 3.1 Carbonates (described using the example of CaCO3)
Prepare two separate solutions.
