Abstract
Abstract Eu 2+ ion doped β-sialon (Si 6− z Al z O z N 8− z : x Eu 2+ ) phosphors were prepared from pyrophyllite-based mixtures by a carbothermal reduction and nitridation method first. Then, the effects of z values and the Eu concentration on the structure and the photoluminescence (PL) properties were investigated. β-Sialon was successfully synthesized as a dominant phase even at the low temperature of 1500 °C, while Si 3 N 4 and AlN weakly coexisted as secondary phases. The PL excitation spectra exhibited the broad spectra covering up to 500 nm, and the greenish-yellow emission was observed at around 580 nm. At z =1 and x =0.012, excellent emission intensity could be attained.
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