(1. 沈陽化工學(xué)院 材料科學(xué)與工程學(xué)院，沈陽 110142；
2. 中國科學(xué)院金屬研究所 沈陽材料科學(xué)國家(聯(lián)合)實驗室，沈陽 110016；
3. 沈陽理工大學(xué) 材料工程學(xué)院，沈陽 110168；
4. 沈陽大學(xué) 材料科學(xué)與工程系，沈陽 110044)
摘 要: 研究以草酸和氨水作為沉淀劑制備BaHfO3׃Ce納米粉體的工藝。用XRD、TEM等測試技術(shù)，分析不同沉淀劑對粉體合成中的物相變化、形貌及Ce3+摻雜量對粉體激發(fā)光譜和發(fā)射光譜的影響。結(jié)果表明：以氨水做沉淀劑在
關(guān)鍵字: BaHfO3׃Ce粉體；共沉淀法；Ce3+摻雜量；光譜特性
（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
