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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
Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University, 5988 People's Avenue, Changchun 130025, People's Republic of China
received May 14, 2020, received in revised form January 26, 2021, accepted February 6, 2021
Vol. 12, No. 1, Pages 1-8 DOI: 10.4416/JCST2020-00017
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.
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Keywords
SiAlON, fly ash, carbothermal reduction, nitridation, Eu2O3
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