Abstract
Abstract Various stannate phosphors were prepared and some of their emissions were determined. Stannate phosphors emit green, blue or yellowish white light when activated by manganese, blue, violet or red by bismuth, orange, green or blue by lead, while those activated by cerium show blue or red emission. It is expected that the activation by tin also occurs in some cases. This is supported by the fact that the emission of magnesium stannate activated by titanium changes by the variation of flux. For different specimens of calcium stannate activated by titanium or cerium, emission spectra under excitation of cathode rays were measured.
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