摘要
本文报道了无保护气氛条件下碳还原硫酸钙方法合成适用于光转换农膜的ＣａＳ：Ｅｕ，Ｃｌ稀土无机发光材料。用电子自旋能谱（ＥＳＲ）探测到Ｅｕ×Ｃａ缺陷浓度随温度升高而增大；１２００℃下合成的ＣａＳ：Ｅｕ，Ｃｌ晶型趋于规则，晶粒小于６μｍ。根据垂直入射到地面的日光光谱、植物最佳生长作用光谱和ＣａＳ：Ｅｕ，Ｃｌ的荧光光谱，从理论上解释了ＣａＳ：Ｅｕ，Ｃｌ是一种优良的光转换农膜荧光添加剂。
The red luminescent material CaS: Eu, Cl applied to the light transition film for farm was prepared by reduction of calcium sulfate in carbon powder under no protective atmosphere(N2) and reducing gas(H2 or CS2). It was detected by ESR spectrum that the Eu×Ca defects concentration will increase when firing temperature rises. The phosphor obtained at 1200℃ consists of large, well-crystallized particles of about 3～4nm in size. From daylight spectrum, the best spectum of plant growth and fluorescence spectra of CaS: Eu, Cl, it was explained that the CaS: Eu, Cl phosphor is good addision of the light transition film for farm.
出处
《稀土》
EI
CAS
CSCD
1996年第3期27-31,共5页
Chinese Rare Earths
关键词
硫化钙
铕
过程优化
发光材料
农膜
塑料簿膜
calcium sulfate, europium, process optimization, application principle
