查询词典 rare earth

Based on these techniques, one-dimensional rare earth orthovanadate nanorods doping with Eu~(3+) ions were synthesized by adding 2～5% mol Eu(NO_3)_3 respectively.

在合成一维LaVO_4、CeVO_4和YVO_4纳米棒的最佳工艺参数的基础上，在前驱体中添加2～5％mol的Eu(NO_3)_3水热合成了具有较好一维形貌的掺Eu的LaVO_4、CeVO_4和YVO_4纳米棒。

Single crystals of rare earth orthovanadate (ReVO_4) including Nd:YVO_4, Nd:GdVO_4 and Nd:LuVO_4 have been proved to be excellent laser materials.

钒酸盐系列晶体被证明是性能优良的激光工作物质。其中，研究最多的是Nd：YVO_4、Nd：GdVO_4和Nd：LuVO_4。

To improve the yield of an Amide-type Tripodal Ligand and investigate its coordination with rare earth ion under mild condition,a series of Amide-type Tripodal Ligands(L1—L4) have been prepared by the reactions of nitrilotriacetic acid and oxalyl chloride with four kinds of amides,respectively.

为了提高酰胺型三脚架型配体的产率，进一步研究其与稀土离子的配位形式及配合物的荧光性能，以氨三乙酸为母体，草酰氯为氯化试剂，与4种胺在较温和的条件下合成了具有三脚架型结构的配体(L1—L4)，并考察了实验条件、反应温度、反应体系溶剂、缚酸剂、反应时间及催化剂对反应产率的影响。

Kinetic spectrophotometric method for the determinationof trace nitrilotriacetic acid;2. To improve the yield of an Amide-type Tripodal Ligand and investigate its coordination with rare earth ion under mild condition,a series of Amide-type Tripodal Ligands(L1—L4) have been prepared by the reactions of nitrilotriacetic acid and oxalyl chloride with four kinds of amides,respectively.

为了提高酰胺型三脚架型配体的产率，进一步研究其与稀土离子的配位形式及配合物的荧光性能，以氨三乙酸为母体，草酰氯为氯化试剂，与4种胺在较温和的条件下合成了具有三脚架型结构的配体(L1—L4)，并考察了实验条件、反应温度、反应体系溶剂、缚酸剂、反应时间及催化剂对反应产率的影响。

In order to further study the blue and green visible band up-conversion emission mechanism of rare earth-doped material, the different host glass of oxyfluoride crystallite glasses were prepared by conventional melting method.

中文摘要：为了进一步探讨稀土掺杂材料在蓝绿波段的上转换发光机制，本文采用传统的熔融技术制备了不同基质材料的氟氧化物上转换微晶玻璃。

Because of the high optical functions as fluorides and the ease in fabrications and high chemical stability as oxide glasses, oxyfluoride glass ceramics, as an special kinds of materials different from crystals and glasses, became a promising host materials for rare earth ions.

玻璃陶瓷作为一种不同于玻璃和晶体的特殊形态的上转换材料，由于兼具氟化物材料的好的光学性质和氧化物材料的稳定性及易于制作，可加工成各种形态的优点而可能成为一种有优良的上转换发光材料。

The Er3＋up-converted luminescent process in oxyfluoride glass-ceramics is discussed and it is found that the non-quadratic relation between green up-converted luminescent intensity and pump power is caused by the strong cross-relaxation process of rare earth ions.

对稀土离子共掺杂系统，分析了Er3＋在铒镱共掺杂的氟氧化物玻璃陶瓷中的上转换发光过程，认为Er3＋绿色辐射的上转换发光强度与抽运激光功率的非平方关系是由于Er3＋和Yb3＋之间的强交叉弛豫过程引起的。

Oxyfluoride materials are composed of fluoride micro-crystal which is inserted into oxide glass host. Rare earth ions were priority deposited into fluoride micro-crystal, with lower phonon energy environment.

氟氧化合物由氟化物微晶镶嵌于氧化物玻璃基质中构成的，掺杂的稀土离子优先沉淀于氟化物微晶中，处于低声子能量的环境。

This research on spectral properties and crystallization stability of Er3+-doped heavy metal oxyfluoride glasses and upconversion luminescence of rare earth-doped heavy metal oxyhalide glasses lay a foundation for the potential use of broadband Er3+-doped fiber amplifier, blue and green lasers.

通过对掺Er3+重金属氧氟玻璃的光谱性质和析晶稳定性研究以及稀土离子掺杂重金属氧卤玻璃的上转换发光研究，为其在宽带掺Er3+光纤放大器和蓝绿光波段激光器中的潜在应用提供基础。

We found out one kind of new orange-red long afterglow material La2O2S: Eu3+, Mg, Zr.2 In the phosphor Gd2O2S, Mg, Ti which was prepared by high-temperature solid-state method, the orange afterglow phenomenon can be seen after illuminated with UV light.3 Using the high-temperature solid-state method, Gadolinium oxysulfide phosphors doped with rare earth ions were synthesized. We can observe the red or orange phosphorescence in Gd2O2S doped with Eu3+, Sm3+, Tm3+, Yb3+, Dy3+, Er3+, Nd3+or Ho3+. This is a new result of the long afterglow phosphors research.4 Using the microwave radiation method, the new Sm3+ doped gadolinium oxysulfide phosphor, which has the orange-red long afterglow emission after illuminated with UV light or visible light, was synthesized for the first time.5 In fluorescent materials YOX doped with europium ions, the long afterglow phenomenon wasnt observed but the blue luminescence of Eu2+ and red luminescence of Eu3+ are simultaneously examined. This is a new result of the valence stability and change of Eu2+ in yttrium oxyhalide .We systematically studied the effects of the host, addition agents and reaction atmosphere on the valence change and fluorescence property of europium ions.

经过系统的研究总结得到以下的结论与成果： 1采用高温固相反应法合成了一系列稀土离子掺杂的硫氧化镧发光粉，发现了该体系中Eu~(3+)的长余辉发光，从而得到一种迄今未见文献报道的红色长余辉发光材料：La_2O_2S：Eu~(3+)，Mg，Zr； 2在Gd_2O_2S，Mg，Ti磷光粉中观察到橙色的长余辉发光现象； 3采用高温固相反应法合成了一系列稀土离子掺杂的硫氧化钆磷光粉，在掺杂Eu~(3+)、Sm~(3+)、Tm~(3+)、Yb~(3+)、Dy~(3+)、Er~(3+)、Nd~(3+)、Ho~(3+)的Gd_2O_2S中观察到红色和橙色长余辉发光； 4首次采用微波法合成了Gd_2O_2S：Sm~(3+)，Mg，Ti磷光粉，该磷光粉经紫外或可见光激发后呈现明显的橙红色长余辉发光； 5在YOX中同时观察到Eu~(2+)和Eu~(3+)的发射，系统研究了基质、添加剂及反应气氛对Eu价态和发光的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。