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采用氧化钆、氧化铕、硝酸、硫酸铵和氨水为实验原料,通过湿化学法合成了Gd_2O_2SO_4∶Eu~(3+)荧光粉。研究表明硫酸根离子与钆离子的摩尔比(m)对合成产物的物相组成影响很大,较优的m值为15,该m值合成的前驱体在马弗炉中800℃煅烧2 h能转化为单相Gd_2O_2SO_4粉体。该Gd_2O_2SO_4粉体呈准球形,团聚较严重,粒径尺寸大小为1~2μm之间。在270 nm的紫外光激发下,Gd_2O_2SO_4∶Eu~(3+)荧光粉呈现红光发射,主发射波长位于620 nm附近。Eu~(3+)离子的猝灭浓度为15 mol%。
The gadolinia, europium oxide, nitric acid, ammonium sulfate and ammonia were used as raw materials to synthesize Gd_2O_2SO_4:Eu ~ (3+) phosphor by wet chemical method. The results showed that the molar ratio of sulfate ion to gadolinium ion (m) had a great effect on the phase composition of the synthesized product. The optimum m value was 15, and the precursor of m value was calcined in a muffle furnace at 800 ℃ for 2 h Can be converted to single-phase Gd_2O_2SO_4 powder. The Gd_2O_2SO_4 powder is quasi-spherical, the reunion is more serious, the particle size size is between 1 ~ 2μm. Gd_2O_2SO_4:Eu ~ (3+) phosphor showed red emission at 270 nm and the main emission wavelength was near 620 nm. Eu ~ (3+) ion quenching concentration of 15 mol%.