rare earth microwave
Bond characteristics and microwave dielectric ceramic of rare-earth
A type of rare-earth tantalite ceramic NdTaO 4 was synthesized by the solid-state reaction method and investigated for the relationship between the structure and microwave dielectric properties for the first time. X-ray diffraction and Rietveld refinement confirmed that an M-fergusonite phase was formed. The dense micromorphology and …
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Microwave Treatment for Extraction of Rare Earth Elements from
The results show that microwave treatment removes water molecules from PG crystal structure; creating cracks and pores on the particles. As a result, leachant molecules can diffuse into the particles and bring more REEs into the solution. Microwave treatment increases the average leaching efficiency of REEs by 30%.
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Dielectric Losses of Microwave Ceramics Based on Crystal Structure
So far, many microwave dielectric materials have been investigated for a range of telecommunication applications. In dielectrics, the three main dielectric properties are quality factor (Q), dielectric constant and temperature coefficient of resonant frequency. Among these, the most essential dielectric property is Q. More specifically, Q is the …
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Facile Preparation and Characterization of Nd2O3 Powder by
The microwave heating technique applied in this work is a green, energy-efficient method. The parameters can provide technical support for preparation of rare-earth Nd 2 O 3 particles meeting morphology and size requirements. The results confirm the feasibility of microwave heating for industrial production of rare-earth oxides.
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Metals | Free Full-Text | Recovery of Rare Earth …
The obtained slag concentrate based on the oxides of rare earth elements is suitable for further pyrometallurgical or hydrometallurgical treatment in order to obtain rare earth elements. ... N. Microwave …
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Structural engineering of rare-earth-based perovskite …
Rare-earth-based perovskites are promising catalysts for OER because of the low cost, the abundance of earth reserves, and coordinated electronic structures. ... Compared with traditional hydrothermal reactions, the use of microwave and ultrasonic waves in chemical synthesis can effectively increase chemical yield, improve purity, and …
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Study on the calcination experiments of rare earth carbonates …
The heating behavior and effect of experimental parameters like holding time, calcination temperature and microwave power on the weight loss of the mixed rare earth carbonate using microwave heating have been studied, also characterized by X-ray diffraction, thermogravimetry-differential scanning calorimetry, scanning electron …
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Decomposition of the mixed rare earth concentrate by …
Mineralogical information on the mechanisms by which microwave heating improved the leaching behavior of rare earth elements (REEs), and an interpretation of …
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Sample preparation for geochemical analysis: Strategies and
Microwave energy as a heat source for the sample decomposition in the chemical laboratory has been in use for more than 30 years. ... Microwave digestion technique for the analysis of rare earth elements, thorium and uranium in geochemical certified reference materials and soils by inductively coupled plasma mass spectrometry. …
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What to Do With a Dead Microwave! : 4 Steps
Step 2: Hacksaw and Dremel Time! Cut away the steel case. I used a Dremel to first cut the tabs on the top, and then the bottom of the side panels. The first photo shows the tabs that hold the top on. The third shows the unit with the top off and the sides and bottom removed. The 2 copper coils came from the bottom of the unit.
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Tuning microwave absorption properties of melt-spun FeSiCo
Besides, the addition of rare earth to the electromagnetic microwave absorbing materials can widen the bandwidth and lower the matching thickness [17, 18]. Proper amount of rare earth elements-doped absorbing materials can effectively improve the electromagnetic parameters, which contributes to the achievement of better …
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Effect of oxidation on the microwave absorption properties of rare
Great effort has been made to develop materials with superior reflection loss (RL), thin thickness, wide bandwidth, and low density to improve their performance in electromagnetic microwave absorption. In this work, the rare-earth intermetallics La 2 Fe 4 Co 10 B fine powders with planar magnetocrystalline anisotropy and high magnetization …
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High-efficiency coherent microwave-to-optics conversion via off
Welinski, S. et al. Electron spin coherence in optically excited states of rare-earth ions for microwave to optical quantum transducers. Phys. Rev. Lett. 122, 247401 (2019).
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A Microwave Digestion Technique for the Analysis of Rare Earth …
Microwave digestions ensure safety and better throughput than block digester methods . Problems with maintenance of bombs restrict their risk-free use and that is also the situation for the high pressure asher. ... Rare earth elements (REEs), Th and U were analyzed from the solution using ICP-MS. Table 2 gives the concentrations of these ...
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Leaching Behavior of Mixed Rare Earth Concentrates after
During microwave heating, the rare-earth fluorocarbons and phosphates were decomposed and eventually converted to rare-earth oxides. Also, the complex rare-earth oxide of Ce 0.5 Nd 0.5 O 1.75 was formed, especially for cerium and neodymium. Compared to conventional radiation heating, sodium hydroxide consumption is reduced, …
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Microwave absorption properties of rare earth (RE) ions doped …
Among different dopants, rare-earth (RE) ions substitution is quite interesting as they make significant changes in structural, electric and magnetic properties. ... Magnetic, dielectric and microwave absorption properties of rare earth doped Ni–Co and Ni–Co–Zn spinel ferrites. J. Magn. Magn Mater., 426 (2017), pp. 629-635.
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Dissolution techniques for determination of rare earth elements in
Cluster 1 includes 30% of the observations (Samples 1, 2, 3, 5, 10 and 15 for both dissolution techniques), and it includes the single and mixed phosphate fertilizers for which we found higher contents of light rare earth elements (LREE). Cluster 2 includes 25% of the samples. This cluster consists of mixed fertilizers (Samples 8, 11, 12, 17 ...
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Study of microwave dielectric properties measurements by various
The dielectric properties and thermostable characteristics of 15 rare earth oxides are systematically investigated in microwave fields. Results indicate that the Pr 6 O 11 of the light and Tb 4 O 7 of the heavy rare earth oxides show excellent responsiveness to microwaves, both start to surge after 500 °C, with dielectric constant values of 10.814 …
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Magnetic, dielectric and microwave absorption properties of rare earth
In this article we analyze the electromagnetic properties of rare earth substituted Ni–Co and Ni–Co–Zn cubic ferrites in the microwave band, along with their performance as microwave absorbing materials. Ceramic samples with compositions Ni 0.5 Co 0.5 Fe 2−x R x O 4 and Ni 0.25 Co 0.5 Zn 0.25 Fe 2−x R x O 4 (R=Y and La, x=0, …
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A Microwave Digestion Technique for the Analysis of Rare Earth …
Two different digestion methods—microwave digestion (Mw) and Savillex digestion (Sx)—were used to evaluate the best quality control for analysis of the rare earth elements, Th and U in the geochemical certified reference material JSd-2, supplied by the Geological Survey of Japan (GSJ). The analysis of trace elements was carried out using …
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A Single Digestion Procedure for Determination of Major, Trace, …
The simultaneous determination of major, trace, and rare earth elements in sediments requires the development of specific procedures to prevent interferences. A single digestion method adapted from the EPA method 3051A is proposed for the quantification of 42 elements in sediments by inductively coupled plasma techniques associated with …
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A new microwave resonant technique for studying rare …
This technique is based on the detection of microwave absorption by the rare earth doped crystal inserted in a resonant microwave cavity and irradiated by photons …
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Magnetic and crystallographic properties of rare-earth substituted
From all the previously studied rare earth garnets, Yttrium based garnet (Y 3 Fe 5 O 12), have shown their unique characteristics in the field of microwave devices applications. Due to extremely low magnetic damping of the order of 10 −5 [ 5 ] and large magnon lifetime, this material finds widespread use in microwave applications including ...
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One-step synthesis and electromagnetic absorption properties
Considering the emergence of severe electromagnetic interference problems, it is vital to develop electromagnetic (EM) wave absorbing materials with high dielectric, magnetic loss and optimized impedance matching. However, realizing the synergistic dielectric and magnetic losses in a single phase material is still a challenge. Herein, high …
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Investigation on Extraction and Recovery of Rare Earth Elements …
Similarly, microwave treatment reduces the leaching time up to a significant extent and it is being used as a controllable heating process that results in faster dissolution of rare earth metals (Al-harahshe and Kingman …
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RECIPIENT: STATE: WY
novel process for the conversion of rare-earth oxides (REOs) to rare-earth metals (RE-metals). The process would be developed so as to achieve an increase in energy efficiency and reduction in emissions, as compared to the current state of technology. UW would develop the process using an existing microwave plasma reactor that would be
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On-chip coherent microwave-to-optical transduction …
Rare-earth ion (REI) ensembles simultaneously coupled to optical and microwave resonators have been proposed for microwave-to-optical (M2O) …
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Leaching Behavior of Mixed Rare Earth Concentrates …
The leaching behaviors of rare earth elements (REEs) in HCl solution have been investigated for mixed rare earth concentrates after decomposition by microwave …
ادامه مطلبAnisotropic Rare-Earth Spin Ensemble Strongly Coupled to a
We report on an on-chip cavity QED experiment with magnetically anisotropic Er 3 + ∶ Y 2 SiO 5 crystals and demonstrate collective strong coupling of rare-earth spins to a lumped element resonator. Moreover, the electron spin resonance and relaxation dynamics of the erbium spins are detected via direct microwave absorption, without the …
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Microwave strengthens decomposition of mixed rare earth …
The potential application of microwave heating technology for processing the mixed rare earth concentrate was systematically investigated by analyzing the microwave absorption characteristics in this study. The complex permittivity was measured through resonant cavity perturbation method. The variations of permittivity, the loss factor, loss …
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