Abstract
Eu doped CaAlSiN3 phosphor was successfully prepared by high-temperature solid phase method using Ca<sub>2</sub>Si<sub>5</sub>N<sub>8</sub>:Eu as major raw materials. The phase transition and luminescence properties were studied in detail. It is found that the phase changes from Ca<sub>2</sub>Si<sub>5</sub>N<sub>8</sub> to CaSiN<sub>2</sub> when the temperature reaches 800 ℃. Then CaAlSiN<sub>3</sub>:Eu phosphor was synthesized by the solid phase reaction: (Ca,Eu)SiN<sub>2</sub>+AlN→(Ca,Eu)AlSiN<sub>3</sub> when the reaches 1500 ℃. The morphology and luminescence properties of CaAlSiN<sub>3</sub>: Eu with different Eu concentration was also studied.
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