| 摘要 |
<p>The invention relates to a luminescent aluminate which is activated by bivalent europium and which has a hexagonal crystal structure corresponding to that of phase 1 β-alumina. According to the invention, the aluminate comprises nitrogen and complies with the formula Ba1-yEuyAl¿11+p(1-x)O17.5+1.5p(1-x)-1.5x?Nx, in which 0.01≤y≤0.40, 1.8≤p≤3.6, 0∫x≤1. It was found to be possible by means of these aluminates to manufacture low-pressure mercury discharge lamps operating by the three-band principle which have a high color rendering index.</p> |
