A new route for the synthesis of beta-sialon: Eu2+ phosphors using pyrophyllite powders

作者：Jun Kukhyun; Lee Kigang; Kim Gunha; Kim Young Jin^*

来源：Ceramics International, 2013, 39: S349-S353.

DOI：10.1016/j.ceramint.2012.10.092

• Powders: solid state reaction
• Optical properties
• Oxynitrides

Eu2+ ion doped beta-sialon (Si6-zAlzOzN8-z:xEu(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. beta-Sialon was successfully synthesized as a dominant phase even at the low temperature of 1500 degrees C, while Si3N4 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.

• 出版日期2013