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共沉淀法制备Nd∶YAG纳米粉体与机理探讨
Preparation of Nd doped YAG nano-sized powders by co-precipitation method and synthesis mechanics
【摘要】 以碳酸氢铵为沉淀剂采用共沉淀法和添加分散剂的方式,获得具有高烧结活性的碳酸盐前驱体,这种前驱体在较低的温度下烧结即可转变成相。同时借助DTA TG、IR、XRD和TEM等测试手段对前驱体和YAG粉体进行表征。结果表明:在分散剂存在的情况下,此800℃左右煅烧2h前驱物直接转变为纯的YAG相,而无其它的杂质相,所得的YAG粉体的颗粒尺寸约20nm,是单分散的形貌近似球形的。此外不同温度下粉体的荧光性质表明,随着烧结温度的提高发光强度有所增加。
【Abstract】 Transparent YAG ceramics can be prepared by using synthesized nano-sized powder. A carbonate precursor with high sintering activity was prepared by co-precipitation method using ACH as precipitant. The resulting YAG powder and precursor precipitant are characterized by DAT-TG, IR, XRD, TEM and PL. The results show Nd∶YAG powder with nano-sized, mono-dispersed and free agglomeration can be obtained by co-precipitation method at the presence of HPC. The Nd3+ PL intensity increased with the rising of the sintering temperature.
【Key words】 yttrium aluminum garnet; co-precipitation; nano-sized powder; dispersant; precursor; photoluminescence;
- 【文献出处】 功能材料 ,Journal of Functional Materials , 编辑部邮箱 ,2004年04期
- 【分类号】TQ174
- 【被引频次】34
- 【下载频次】332