Nd^(3+):YAG纳米粉的共沉淀合成

Synthesis of Nd^(3+):YAG Nano-powder with Co-precipitation Method

采用共沉淀法制备了Nd3+:YAG纳米粉。研究了溶液pH值和沉淀剂的含量对前驱体性能的影响、灼烧温度等对纳米粉性能的影响,通过热分析发现前驱体在125℃附近脱去吸附水,在800℃碳酸盐分解,925℃左右形成YAG相,XRD分析发现900℃时开始形成YAG相,1000℃时,YAG晶化完全,SEM分析显示1000℃灼烧样品的平均粒径约为90nm;溶液的pH值为8,沉淀剂的含量高于理论含量3倍时,纳米粉和前驱体整体性能较好。

In this paper, Nd^3＋：YAG nano-powder was synthesized by co-precipitation method. The effects ofpH values and precipitants on precursor properties were studied. Effect of calcined temperature on nano-powder properties was also studied. Thermal analysis indicates that absorbed water of precursor was dehydrated at about 125℃, carbonate was decomposed at 800℃ and YAG phase was formed at around 925℃. X-ray diffraction showed YAG phase was formed firstly at 900℃ and pure and crystallized YAG phase was obtained. SEM analysis revealed that average grain of nano-powder at calcined at 1000℃ was about 90nm. The nano-powder and precursor were with good property with the pH value 8 of solution and the content of precipitants is three times larger than the theoretic content.