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Yellow-emitting Ca-α-SiAlON:Eu x phosphor powders have been synthesized by the carbothermal-reduction–nitridation of a homogeneous Ca–Si–Al–Eu–C–O mixture at 1550°C in flowing nitrogen. The resulting phosphor powder emits yellow luminescence with a peak wavelength at 575–590nm under ultraviolet excitation at 370nm. Compared with commercial Ce 3+ -doped yttrium aluminum garnet (YAG:Ce...