| 柠檬酸螯合法制备BaHfO3：Ce^3＋纳米材料及其发光特性 | |
| Alternative Title | Preparation and Luminescence Characteristics of Nano BaHfO3：Ce^3＋ Powders Prepared by Citric Acid Chelating Process |
| 王华栋; 马伟民; 闻雷; 尹凯; 沈世妃 | |
| 2009 | |
| Source Publication | 稀有金属材料与工程
 |
| ISSN | 1002-185X |
| Volume | 38.0Issue:008Pages:1446-1449 |
| Abstract | 通过柠檬酸螯合法合成BaHfO3：Ce^3＋纳米粉体。采用TG—DTA、XRD、SEM等手段对粉体进行了表征，用荧光光度仪分析样品的激发光谱和发射光谱。结果表明：在CA：EG=1：3的条件下得到干凝胶前驱体，经1050℃煅烧2h，合成出结晶度高、近似球形、粒径尺寸约为40nm的BaHfO3：Ce^3＋纳米粉体。Ce^2＋掺杂浓度为0．9mol％的BaHfO3：Ce^3＋样品激发光谱和发射光谱的相对强度最大。激发光谱有两个较宽的谱带，发光峰值分别在393和445nm波长处最大。样品在393和445nm的发射光谱都是由两个发光带组成，在530和590nm波长处存在最大峰值，对应掺杂Ce^3＋的5d→^-2F5/2和5d→^2F7/2发光跃迁。然而这两条发射光谱有明显不同，这是因为Ce^3＋离子的4f基态由两个能量差约为2000cm^-1的能级组成。 |
| Other Abstract | Citric acid chelating method was used to prepare Ce^3＋ doped BaHfO3 nano-powder. TG-DTA, XRD and SEM were employed to characterize the powder. The excitation and emission spectra of the specimens were analyzed by the fluorescence photometer. Results show that BaHfO3：Ce^3＋ nanometer powder with high degree of crystallinity, nearly spherical morphology and 40 nm particle size could be synthesized after the precursor gel prepared under the condition of CA：EG=1：3 was calcined at 1050 ℃ for 2 h. The maximum relative intensities of the excitation spectra and emission spectra appeared for the BaHfO3：Ce^3＋ specimen with Ce^3＋ doped concentration of 0.9 mol%. The excitation spectrum has two relatively wide spectrum bands where there are maximum peak values at the wavelength of 393 nm and 445 nm, respectively. The emission spectra at λex= 393 nm and λex=445 nm also have two spectrum bands where exist maximum peak values at 530 nm and 590 nm, respectively, corresponding to 5d→^2F5/2 and 5d→^2F7/2 transitions of Ce^3＋ cation, respectively. The emission spectra at 393 nm and 445 nm are obviously different, because the 4f ground State of Ce^3＋ cation is formed by two energy levels, with the energy difference of about 2000 cm^-1. |
| Keyword | 闪烁陶瓷 柠檬酸 sol-gel法 BaHfO3：Ce^3＋纳米粉体 发光特性 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:3718638 |
| Citation statistics |
Cited Times:1[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/142753 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | 王华栋,马伟民,闻雷,等. 柠檬酸螯合法制备BaHfO3：Ce^3＋纳米材料及其发光特性[J]. 稀有金属材料与工程,2009,38.0(008):1446-1449. |
| APA | 王华栋,马伟民,闻雷,尹凯,&沈世妃.(2009).柠檬酸螯合法制备BaHfO3：Ce^3＋纳米材料及其发光特性.稀有金属材料与工程,38.0(008),1446-1449. |
| MLA | 王华栋,et al."柠檬酸螯合法制备BaHfO3：Ce^3＋纳米材料及其发光特性".稀有金属材料与工程 38.0.008(2009):1446-1449. |
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