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以β-丙氨酸和尿素为燃料,采用溶液燃烧法在低温450℃下合成制备了Ca3Al2O6:Eu3+荧光粉。样品的发射光谱由位于594 nm、617 nm、653 nm及700 nm处的4组线状峰构成,分别对应Eu3+的5D0→7Fj(j=1~4)特征跃迁,其中617 nm处的峰最强,样品呈现红色发光。考察了Eu3+掺杂浓度对晶体结构和发光性能的影响。结果呈示:随着掺杂浓度的增加晶格常数逐渐减小,[O—Al—O]的对称伸缩振动Raman峰蓝移;在低掺杂浓度时荧光强度逐渐增大,掺杂6%时达到最大,之后出现浓度猝灭现象,猝灭机制为交互作用;Eu3+的5D0→7F2与5D0→7F1跃迁强度比随着掺杂浓度的增加逐渐增大,掺杂的Eu3+主要取代处于非对称中心的Ca2+。
Using β-alanine and urea as fuel, the Ca3Al2O6: Eu3 + phosphor was synthesized by solution combustion at low temperature of 450 ℃. The emission spectrum of the sample consists of 4 linear peaks at 594 nm, 617 nm, 653 nm and 700 nm, which correspond to the 5D0 → 7Fj (j = 1 ~ 4) transitions of Eu3 +, respectively. The peak at 617 nm Strong, samples show red glow. The effects of Eu3 + doping concentration on the crystal structure and luminescent properties were investigated. The results show that the lattice constant of the [O-Al-O] symmetric stretching vibration decreases with the increase of the doping concentration, and the Raman peak shifts blue at the doping concentration. The fluorescence intensity gradually increases at 6% doping And the quenching mechanism is the interaction. The intensity ratio of 5D0 → 7F2 and 5D0 → 7F1 transitions of Eu3 + increases with the increase of doping concentration. The main substitution of Eu3 + is in the asymmetric center Of Ca2 +.