(1. 沈阳化工学院 材料科学与工程学院，沈阳 110142；
2. 中国科学院金属研究所 沈阳材料科学国家(联合)实验室，沈阳 110016；
3. 沈阳理工大学 材料工程学院，沈阳 110168；
4. 沈阳大学 材料科学与工程系，沈阳 110044)
摘 要: 研究以草酸和氨水作为沉淀剂制备BaHfO3׃Ce纳米粉体的工艺。用XRD、TEM等测试技术，分析不同沉淀剂对粉体合成中的物相变化、形貌及Ce3+掺杂量对粉体激发光谱和发射光谱的影响。结果表明：以氨水做沉淀剂在
关键字: BaHfO3׃Ce粉体；共沉淀法；Ce3+掺杂量；光谱特性
（1. School of Materials Science and Engineering, Shenyang Institute of Chemical Technology, Shenyang 110142, China;
2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110016, China;
3. School of Materials and Engineering, Shenyang Technology University, Shenyang 110168,China;
4. Department of Materials Science and Engineering, Shenyang University, Shenyang 110044, China）
Abstract: The processing technology of Ce doped-BaHfO3 nano-powders that is prepared by co-precipitation (with oxalic acid and ammonia as the precipitant, respectively) was investigated. XRD and TEM were employed to analyze the effects of different precipitates on the phase change, morphologies of powders and influences of Ce3+ dopant content on the excitation and emission spectra of powders. The results show that spherical BaHfO3׃Ce nano-powders are synthesized only at 900 ℃ for 2 h and the average diameter is about 15 nm with ammonia as precipitant. But using oxalic acid as precipitant, the powders have polygonal morphology after calcining at 1 000 ℃ for 2 h and the average diameter is about 60 nm. Minor Ce3+ has no effect on the crystal structure. The relative intensity of photoluminescence peak has the maximum value when the Ce3+ dopant content is 0.3% (mole fraction). The concentration quench occurs when the Ce3+ dopant content exceeds 0.3%. The emission character is resulted from 5d→2F5/2 and 5d→2F7/2 transitions of Ce3+ and both the excitation and emission spectra are wide band.
Key words: BaHfO3׃Ce powder; co-precipitation; Ce3+ dopant content; spectrum characteristics
