Gas-Reduction–Nitridation Synthesis of CaAlSiN3:Eu2+ Fine Powder Phosphors for Solid-State Lighting

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• 作者：Takayuki Suehiro ; Rong-Jun Xie ; Naoto Hirosaki
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：February 19, 2014
• 年：2014
• 卷：53
• 期：7
• 页码：2713-2717
• 全文大小：268K
• ISSN：1520-5045

文摘

CaAlSiN₃:Eu²⁺ fine powder phosphors were successfully synthesized from the fully oxidic system CaO/Al₂O₃/SiO₂ using the gas-reduction鈥搉itridation (GRN) method. The GRN reaction was conducted at low temperatures of 1370 掳C to obtain nitrided precursor powders that could be converted into nearly single-phase CaAlSiN₃ by a moderate heat treatment at 1600 掳C for 4 h in a N₂ atmosphere of 0.92 MPa. Highly efficient CaAlSiN₃:Eu²⁺ red-emitting phosphors were obtained using a fluoride activator, with external quantum efficiencies of up to 72%.