稀土长余辉发光粉生产工艺的研究

研究了原料纯度，恒温时间，还原剂加入量及降温方式对ＳｒＡｌ２Ｏ４：Ｅｕ，Ｄｙ长余辉发光粉的余辉亮度及持续时间的影响，选用Ａｌ２Ｏ３（９９％）和分析纯的ＳｒＣＯ３作原料，采用活性炭还原、恒温３ｈ，随炉自然降温的生产工艺，制得了发光亮度及余辉持续性能优良的长余辉发光粉产品，降低了成本，简化了生产工艺。

Study on the process for producing rare earth metal long phosphorescent phosphor

Effect of factors like raw material purity, constant temperature|keeping time, addition of reductant and temperature|lowering way on the phosphorescent brightness and {lasting} time of the RE phosphor has been studied. When Al-2O-3 (99%) and analytically pure SrCO-3 are used as raw material, under the condition of taking activated carbon as reductant, keeping constant temperature for 3 hours and naturally lowering the temperature, high|qua| lity phosphor product can be produced. The cost is lowered and the process is simplified.