Cerium doping

Cerium-doped yttrium compounds (aiuminates and silicates) cover a very broad spectral range in television tubes. 

Now the possible explanation for the greater degradation of phenol by the cerium doped copper crystals than those of either cobalt or manganese ions could... 

Thevenin PO, Pettersson AALJ, Jaras SG, Fierro JLG (2003) Catalytic combustion of methane over cerium-doped palladium catalysts. J Catal 215 78-86... 

Researchers at the Brookhaven National Laboratory, in applying X-ray techniques to a cerium-doped electron superconductor developed at the University of Tokyo, found that the holes of a hole superconductor... 

Transparency to the incident radiation is a trait of a transducer. Yttrium oxide, doped with lanthanum oxide is transparent to IR radiation. Blocking of undesired UV radiation is achieved by cerium doped glasses. Some examples of modulating transducers are given in Table 12.17. 

Other groups reported the solution synthesis of a cerium-doped inorganic phosphor library (73) to optimize their structure as luminescence down-converters in white Light Emitting Diodes (LEDs) and the use of cathodoluminescence (CL) (74) to identify... 

The low light stability, the fast settling caused by the high density of 7.73 g cm , and the lack of mechanical stability limit the use of BiOCl in technical applications. The pigment is mainly used in cosmetics, but also in buttons and jewelry. The light stability can be improved to some extent by cerium doping and UV absorbers. 

A) Synthetic fused silica. (B) Natural fused silica. (C) Titanium doped natural fused silica. (D) Cerium doped natural fused silica. (E) FVrex glass. (F) Nonex glass. 

Domenech, A., Aucejo, R., Alarcon, J., and Navarro, P. 2004b. Electrocatalysis of the oxidation of methylenedioxyamphetamines at electrodes modified by cerium-doped zirconias. Electrochemistry Communications 6, 719-723. 

Cerium-doped yttrium oxyorthosilicate (YSO) is a new type of detector, but no commercial manufacturer has yet used it in PET technology. 

A series of palladium, platinum and rhodium (single and combined) catalysts supported on cerium-doped ysiumina has been prepared. The monometallic catalysts were prepared by adsorption from the metal solution, and the multimetaUic catalysts by joint adsorption as well as by physical mixture of those monometallic which allowed to obtain similar final metal composition. The three-way behaviour of the prepared catalysts has been tested with fuU synthetic gas mixtures composed of N2, CO2, CO, CsHe, NO, O2 and H2O under redudng-oxidising cycled and stationary feedstream compositions. 

Data collected from undoped lanthanum-cobalt perovskites are discussed elsewhere [15]. Here data was collected from the cerium doped lanthanum-cobalt perovskites. The 01s spectra depicted in Figure 4 shows two main photo lines at 529.1 eV and 531.2-531.7 eV. 

Wojtowicz AJ, Lempicki A, Wisniewski D, Boatner LA (1994) Cerium-doped orthophosphate scintillators. 

The emitted gamma photons produced by positron-electron annihilation can be detected using scintillation crystal detectors such as sodiiun iodide (Nal), bismuth germaniiun oxide (BGO) and cerium doped lutetium oxyorthosili-cate (LSO). The short half-life of most positron emitters leads to high specific activity. Only a very small quantity of radio-labeled molecules is thus required, making positron annihilation detection techniques very non-invasive. In fact, practical catalyst studies can be carried out using less than 37 kBq... 

Current efforts to select better detectors for spectral analysis have identified several materials, notably cerium-doped lanthanum chloride or bromide for... 

Cherepy, N. J., Kuntz, J. D., Tillotson, T. M., Speaks, D. T., Payne, S. A., Chai, B. H. T., Porter-Chapman, Y, Derenzo, S. E. 2007. Cerium-doped single crystal and transparent ceramic lutetium aluminum garnet scintillators. Nuclear Instruments and Methods in Physics Research A 579 38-41. 

Lutetium is also a very rare metal, with a world production (as lutetium oxide) of approximately 10 tons per year. One commercial application is known it is used as a P-emitter, (when Lu-176 has been exposed to neutron activation) in the oil refining industry (Emsley 2001). It was used in so-called-bubble memory, a technology for computer memory that has become obsolete, since hard disks have made their rapid substantial advance. It is still used in scintillation crystals for PET-scanners (positron emission scanners). It is used here in the form of cerium-doped Lutetium oxy-orthosilicate (LSO), with the formula Ce2x Lu2(l — x) SiOs, where x is within tire range from approximately 2 x 10 to approximately 3 X 10 (Melcher 1990 Daghighian et al. 1993). 

Li HL, Liu XI, Huang LP (2005) Fabrication of transparent cerium-doped lutetium aluminum garnet (LuAG Ce) ceramics by a solid-state reaction method. J Am Ceram Soc 88 3226-3228... 

Li JL, Xu J, Shi Y, Qi HF, Xie JJ, Lei F (2014) Fabrication and microstructure of cerium doped lutetium aluminum garnet (Ce LuAG) transparent ceramics by solid-state reaction method. Mater Res Bull 55 161-167... 

Li HL, Liu XJ, Xie RJ, Zhou GH, Hirosaki N, Pu XP et al (2008) Cerium-doped lutetium aluminum garnet phosphors and optically transparent ceramics prepared from powder precursors by a urea homogeneous precipitation method. Jpn J Appl Phys 47 1657-1661... 

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