利用SnO2:Sb干凝胶部分升华产物处理ZnS:Mn荧光粉

以SnCl2?2H2O、SbCl3为原料, 通过溶胶-凝胶法制备SnO2:Sb干凝胶. 利用干凝胶氧化过程中的部分升华产物对新制的ZnS:Mn荧光粉进行了表面处理. 在固定氧气流量和氧化时间的条件下, 考察了SnO2:Sb干凝胶与ZnS:Mn荧光粉的质量比和氧化温度对处理后荧光粉电阻率的影响. 当干凝胶粉与荧光粉的质量比为3.0, 氧化温度为500 ℃处理后荧光粉的电阻率明显下降. 对处理后的荧光粉进行了室温光致荧光(PL)光谱、X射线衍射(XRD)以及透射电镜(TEM)分析. 结果表明对荧光粉进行表面处理没有改变荧光粉的光致发光性质和晶体结构.

Treatment of ZnS:Mn Phosphors by Partial Sublimation of SnO2:Sb Xerogel

SnO2:Sb xerogel was prepared using the sol-gel technique with SnCl2?2H2O and SbCl3 as the starting materials. Partial sublimation of SnO2:Sb xerogel during oxidation was utilized to treat the as-prepared ZnS:Mn phosphor. The mass ratio of SnO2:Sb xerogel to ZnS:Mn phosphors changed from 0.5 to 4.0 and the range of the oxidation temperature was 300?600 ℃ under the given oxygen flux (0.2 L?min?1) and oxidation duration (30 min). The treated phosphors were characterized by X-ray diffraction (XRD), photoluminescence (PL), transmittance electron microscopy (TEM), and electrical resistance measurements. The results showed that the conductivity of the treated ZnS:Mn phosphors was obviously improved when the mass ratio of SnO2:Sb xerogel to ZnS:Mn phosphors and the oxidation temperature were 3.0 and 500 ℃, respectively. The photoluminescence characteristics and crystal structure of the treated ZnS:Mn phosphors remained the same as the as-prepared phosphors.