scholarly journals Rare Earths Doped Materials

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 231
Author(s):  
Maria Milanova ◽  
Martin Tsvetkov
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Rare Earth Elements ◽  
Rare Earths ◽  
Fiber Amplifiers ◽  
Solid State Lasers ◽  
Wide Range ◽  
Doped Materials ◽  
The Rare Earth

Тhe properties of the Rare Earth Elements allow a wide range of applications in optoelectronics, fiber amplifiers, solid-state lasers, telecommunications, biosensing, and photocatalysis, just to mention a few [...]

Optical Activation of Ion Implanted Rare-Earths

1993 ◽  
Vol 301 ◽  
Author(s):  
P.N. Favennec ◽  
H. L'haridon ◽  
D. Moutonnet ◽  
M. Salvi ◽  
M. Gauneau
Keyword(s):  
Rare Earth ◽  
Ion Implantation ◽  
Rare Earth Elements ◽  
Rare Earths ◽  
Annealing Temperature ◽  
Implantation Energy ◽  
Optical Activation ◽  
Energy Dose ◽  
The Rare Earth ◽  
Ion Implanted

ABSTRACTA review of the main results concerning the ion implantation of the rare-earth elements is given.To obtain the best optical activation of rare-earths, we attempt to optimize the implantation (energy, dose) and annealing (temperature, duration) conditions. The studied materials are Si, II-VI binaries (ZnTe, CdS), III-V binaries (GaAs, InP), III-V ternaries (GaAlAs, GaInAs) and III-V quaternaries (GaInAsP).

scholarly journals The isotopic constitution and atomic weights of the rare earth elements

1934 ◽  
Vol 146 (856) ◽  
pp. 46-55 ◽  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Positive Result ◽  
Rare Earths ◽  
Periodic Table ◽  
Resolving Power ◽  
Fundamental Importance ◽  
Lack Of Information ◽  
Isotopic Constitution ◽  
The Rare Earth

Hitherto the widest gap in our knowledge of the isotopic constitution of the elements has been in that part of the periodic Table containing rare earths. A means of obtaining the mass rays of these substances was discovered 10 years ago. By this it was possible to demonstrate the simplicity of lanthanum and praseodymium and to obtain a provisional analysis of the complex elements cerium and neodymium. Beyond these the only positive result was a faint blurr which suggested that erbium was complex and it was decided to postpone further attempts until an instrument of higher resolving power was available. When this was constructed it was naturally first applied to the numerous problems which appeared to be of more fundamental importance so that the complete lack of information on elements 62 to 76 remained.

scholarly journals Geochemistry of the rare earth elements in the sparkling groundwaters of the Caucasus ridge, Russia

2019 ◽  
Vol 98 ◽  
pp. 01009
Author(s):  
Evgenia Chirkova ◽  
Ekaterina Baranovskaya ◽  
Natalia Kharitonova ◽  
Vasily Lavrushin ◽  
Georgy Chelnokov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Characteristic Feature ◽  
Rare Earth Elements ◽  
Mineral Waters ◽  
The Caucasus ◽  
Wide Range ◽  
The Absolute ◽  
The Rare Earth

The paper presents data on the content and distribution of rare earth elements (REE) in the high pCO2 mineral waters of the Caucasus mountain-folded region. It is shown that the concentrations of REEtotal are rather high in the studied waters. However, they vary in a very wide range (from 0.46 to 50.37 µg/L). A characteristic feature of these waters is the predominance of light REE in comparison with heavy REE in them. The distinct correlation of REEtotal in the solution from the concentration of iron and aluminum in it indicates that the absolute contents of REE in the mineral waters of the region are regulated not only by pH and Eh of the solution but also by the content of these elements in it.

Securing new non-China rare earths will be challenging

2019 ◽  
Keyword(s):  
United States ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Rare Earths ◽  
The United States ◽  
Content Type ◽  
China Trade ◽  
The Us ◽  
Exchange Traded Fund ◽  
The Rare Earth

Significance The rare earth ores China imports from the United States will face a 25% rate, however, reducing the attractiveness of processing the material in China. The rare earth exchange-traded fund that US equity investors can buy has lost around 50% since January 2018 with the 1-billion-dollar rare earth elements market experiencing an uneventful 2018 after years of oversupply. Impacts If the renminbi continues strengthening to the dollar, Chinese exporters will ask for a higher dollar-denominated price for rare earths. Calls to nationalise the 75%-Chinese-owned Mountain Pass mine in California may intensify should the US-China trade negotiations fail. China will continue to consume 70% of its rare earths output, and its exports are likely to continue to avoid tariffs.

Flame spectra of the rare-earth elements*

1962 ◽  
Vol 18 (4) ◽  
pp. 1127-1153
Author(s):  
V FASSEL ◽  
R CURRY ◽  
R KNISELEY
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
The Rare Earth

China and the Geopolitics of Rare Earths

2017 ◽  
Author(s):  
Sophia Kalantzakos
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Resource Competition ◽  
Renewable Energy Sources ◽  
High Tech ◽  
Trade Dispute ◽  
Policy Responses ◽  
Economic Statecraft ◽  
The Rare Earth

In 2010, because of a geopolitical incident between China and Japan, seventeen elements of the periodic table known as rare earths became notorious overnight. An “unofficial” and temporary embargo of rare-earth shipments to Japan alerted the world to China’s near monopoly position on the production and export of these indispensable elements for high-tech, defense, and renewable energy sources. A few months before the geopolitical confrontation, China had chosen to substantially cut export quotas of rare earths. Both events sent shockwaves across the markets, and rare-earth prices skyrocketed, prompting reactions from industrial nations and industry itself. The rare-earth crisis is not a simple trade dispute, however. It also raises questions about China’s use of economic statecraft and the impacts of growing resource competition. A detailed and nuanced examination of the rare-earth crisis provides a significant and distinctive case study of resource competition and its spill-over geopolitical effects. It sheds light on the formulation, deployment, longevity, effectiveness, and, perhaps, shortsightedness of policy responses by other industrial nations, while also providing an example of how China might choose to employ instruments of economic statecraft in its rise to superpower status.

scholarly journals Rationally designed mineralization for selective recovery of the rare earth elements

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Takaaki Hatanaka ◽  
Akimasa Matsugami ◽  
Takamasa Nonaka ◽  
Hideki Takagi ◽  
Fumiaki Hayashi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Selective Recovery ◽  
The Rare Earth

Rare earth elements recovery from secondary wastes by solid-state chlorination and selective organic leaching

2021 ◽  
Vol 122 ◽  
pp. 55-63
Author(s):  
S. Pavón ◽  
T. Lorenz ◽  
A. Fortuny ◽  
A.M. Sastre ◽  
M. Bertau
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Rare Earth Elements
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