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采用水热法制备NaGdF4∶Yb3+,Er3+及Na(Y,Gd)F4∶Yb3+,Er3+,通过改变温度、时间、pH、柠檬酸三钠浓度比、氟源浓度比及掺杂Y3+浓度来调节颗粒的尺寸及研究其对发光强度的影响。通过XRD、FE-SEM、PL测试对样品进行表征分析。当溶液呈强酸性时,形成的是纯GdF3相;pH提高后,GdF3转变为β-NaGdF4相。柠檬酸三钠含量的增加会抑制颗粒尺寸的生长从而降低发光强度。氟源含量的增加会使颗粒沿(001)面生长,发光强度也增大。而随着掺杂Y3+含量的增加,颗粒尺寸增大,发光强度呈现先下降后升高的趋势。
Hydrothermal preparation of NaGdF4: Yb3 +, Er3 + and Na (Y, Gd) F4:Yb3 +, Er3 +, by changing the temperature, time, pH, trisodium citrate concentration ratio, fluoride concentration ratio and the concentration of Y3 + The size and study of its impact on the luminous intensity. The samples were characterized by XRD, FE-SEM, PL. When the solution is strongly acidic, a pure GdF3 phase is formed; after the pH is increased, GdF3 is converted to a β-NaGdF4 phase. An increase in the amount of trisodium citrate inhibits the growth of particle size and hence the luminous intensity. The increase of the content of fluorine source will make the particles grow along the (001) plane and the luminescence intensity also increases. With the increase of doped Y3 + content, the particle size increases, the luminous intensity showed the first decline and then increase.