Preparation and Characterisation of Sr2CeO₄:Eu³⁺ Rare Earth Luminescent Material by High Temperature Mechano-Chemical Method

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• 作者：Xue Yang¹ ; Zhongbao Shao² ; ^{shaozongbao@126.com" class="auth_mail" title="E-mail the corresponding author} ; Hongqiang Ru¹
• 关键词：Sr2CeO4 ; Eu3+ ; High-temperature mechano-chemical method ; High-temperature solid state method ; Citric acid gel method
• 刊名：Journal of Materials Science & Technology
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：32
• 期：10
• 页码：1066-1070
• 全文大小：1503 K

文摘

A novel, high-temperature, mechano-chemical (HTMC) method was developed to synthesise single-phase Sr₂CeO₄:Eu³⁺ phosphor. Phosphors were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), and luminescence spectra. Compared with phosphors prepared by the traditional high-temperature solid state method and citric acid gel method, single-phase Sr₂CeO₄:Eu³⁺ powders by using the HTMC method, with small average particle sizes of about 5 µm, a narrow size distribution range and uniform dispersion, were prepared at 800 °C, and reached their maximum luminescent intensity at 900 °C. Under ultraviolet excitation at 298 nm, the sample showed good luminescence with the strongest red light of 616 nm. However, Sr₂CeO₄:Eu³⁺ was prepared at the higher temperature of 1100 °C by solid state method and citric acid gel method. The particle size was too large and uneven with phosphor agglomeration by high-temperature solid state method. The luminescent intensity reached a maximum for Sr₂CeO₄:Eu³⁺ phosphor at a synthesis temperature of 1100 °C by using the high-temperature solid state method, and at 1200 °C by both citric acid gel and chemical precipitation methods. Furthermore, the advantages of the Sr₂CeO₄:Eu³⁺ powder prepared by HTMC method were discussed compared with that prepared using traditional high-temperature solid state and citric acid gel methods.