Abstract
BaZrxNd1−xO3 perovskites were prepared by the conventional solid state ceramic route for x=0.85, 0.9, 0.95, 0.99, 0.995 and 0.999. The powders were calcined at 1250°C. X-ray diffraction patterns of the samples confirmed the cubic phase formation and no considerable additional peaks were found. The absorption spectra of doped samples showed strong absorption around 225nm, a shoulder at 250nm and a broad peak around 330nm. The samples with higher concentrations of neodymium show peaks around 750 and 800nm. The absorption at 250nm was due to the absorption by the host BaZrO3 and others can be attributed to that of Nd3+. The emission spectra of the samples were recorded for different excitations and strong emissions were observed around 344nm, 360nm, 401nm, 527nm and 901nm. Chromaticity values of the samples measured using CIE chromaticity diagram were also discussed.
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