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The Effects of Eu₂O₃ Additive Amounts and Addition Methods on the Synthesis of β-SiAlON Multiphase Materials from Fly Ash Acid Slag

Kuizhou Dou, Yinshan Jiang, Bing Xue, Cundi Wei, Fangfei Li

Journal of Ceramic Science and Technology, Vol. 12, No. 1 (2021), pp. 1-8

DOI: 10.4416/JCST2020-00017

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Abstract

β-SiAlON:Eu phosphors prepared from acid slag of fly ash at low temperatures were studied. The effect of the amounts and addition methods of Eu2O3 additives was discussed. The phase compositions of the products were characterized with X-ray diffraction (XRD) spectroscopy. The photoluminescence (PL) properties of the Eu-doped β-SiAlON phosphors were studied by means of photoluminescence spectroscopy. The morphology of the products was characterized with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results confirmed that the alumina extracted acid dissolution slag could produce β-SiAlON: Eu multiphase phosphors at 1 400 °C. The optimum Eu concentration was approximately 0.08. The PL spectrum emission range is located in the violet/blue spectral range.

Keywords

SiAlON, fly ash, carbothermal reduction, nitridation, Eu2O3

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