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采用高效、便捷的燃烧合成工艺,通过调整多项工艺参数,制备出了高性能Eu~(2+)掺杂的Ca-α-Sialon体系荧光粉。对原始反应物中燃烧物质的比重进行了步长为1%(质量分数)的精细调控,探索了硅粉原料比例对产物性能的影响规律,确定了最佳原料配比;通过精细调控体系中作为发光中心的Eu2+掺杂量,探究了产物发光性能随铕离子掺杂浓度的变化规律;最终确定了最为适宜的燃烧合成反应参数。通过使用XRD、SEM、等测试手段对产物进行分析,发现其α-Sialon相纯度高,残余硅少,颗粒结晶良好,粒度分布均匀,PL谱测试表明其在250~350 nm和350~450 nm区间内存在2个较宽的吸收带,在580 nm附近处有较强的黄光发射,半峰宽约为94 nm。
The high-performance Eu 2+ doped Ca-α-Sialon phosphor has been prepared by the efficient and convenient combustion synthesis process by adjusting a number of process parameters. The proportion of the raw materials in the original reactant was finely controlled by the step of 1% (mass fraction), and the effect of the proportion of silicon powder on the product performance was explored, and the optimal ratio of raw materials was determined. Through fine control system As the luminescence center of Eu2 + doping, the luminescence properties of the product with europium ion doping concentration of the law of change; finally determine the most appropriate combustion synthesis reaction parameters. The results of X-ray diffraction (XRD), scanning electron microscopy (SEM), and other test methods showed that the α-Sialon phase has high purity, less residual silicon, good grain growth and uniform particle size distribution. There are two broad absorption bands in the interval, with a strong yellow emission near 580 nm and a half-width of about 94 nm.