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用沉降粒度仪测定,并用对数正态分布参数表示法计算了十几种不同ZnS原料及对应的(Zn,Cd)S:Cu ACEL粉的粒度分布,发现ZnS原料对数正态分布的分散程度lnσ及中心粒径d_(50)对(Zn,Cd)S:Cu粉的粒径分布均有影响,其中前者的影响尤为明显。本文还研究了(Zn,Cd)S:Cu的粒度分布对亮度的影响,发现850℃左右在硫气氛中烧得的(Zn,Cd)S:Cu粉,其沉降平均粒径d为10—30μ时,粒径较大的,用交流电致发光盒测得的亮度大体上较高;沉降d为20—30μ(扫描电镜测d约3—6μ)时,其ACEL亮度性能较好。
The particle size distribution of a dozen different ZnS raw materials and the corresponding (Zn, Cd) S: Cu ACEL powders were determined by the sedimentation particle size analyzer and lognormal distribution parametric representations. The distribution of lognormal distribution of ZnS raw materials was found The degree of lnσ and center particle size d_ (50) have an impact on the particle size distribution of (Zn, Cd) S: Cu powders, especially the former. The effect of (Zn, Cd) S: Cu particle size distribution on the brightness is also studied. It is found that the (Zn, Cd) S: Cu powder calcined at about 850 ℃ in the sulfur atmosphere has an average particle diameter d of 10- At 30μ, the larger the particle size, the brilliance measured by the AC electroluminescent cell is generally higher; the ACEL brightness performance is better when the sedimentation d is 20-30μ (scanning electron microscopy d is about 3-6μ).