rare earth particulate

Rare earth oxides (high purity, particulate, spherical ...

Rare earth oxides (high purity, particulate, spherical particles, etc.) and rare earth compounds (chloride, nitrate, solution, etc.) Rare earth is a generic name for 17 elements. Its applications range from phosphor applications, various ceramic sintering aids, plasma-resistant coating materials, scintillators for medical purposes, fuel cells ...

US8629077B2

A rare earth alumina particulate composition manufacturing method and application are disclosed. The rare earth alumina of the invention is a particulate of porous structure with a molecular formula (RE x,Al 1-x ) 2 O 3, phase γ or γ+δ characterized by a particle size distribution ranging from 1 to 80 μm with a D 50 of 5 to 15 μm, a pore size distribution ranging from 0.4-200 nm with an ...

Rare earth elements of sinking particulate matter in the ...

Settling particles were collected with time-series sediment traps at four depths (1174 m, 3680 m, 5687 m, and 8688 m) moored at the deepest site (water depth 9200 m) of the Japan Trench for the period from March 5, 1991 to March 2, 1992. The composition of rare earth elements (REEs) in the sinking particles selected for four seasons were measured to investigate the REE fractionation during ...

Seawater‐Particle Interactions of Rare Earth Elements and ...

2021-7-15 · PAAS-normalized patterns of particulate rare earth elements (REEs) of this study showing flat or light REE and MREE enriched patterns compared to the seawater-like, heavy REE enriched particulate REE patterns reported from the southeast Atlantic (station S4) by Garcia-Solsona et al. .

BG

Abstract. Particulate concentrations of the 14 Rare Earth Elements (PREE), yttrium, and 232-thorium were measured in 200 samples collected in the epipelagic (ca. 0–200 m) and mesopelagic (ca. 200–1500 m) zones of the North Atlantic during the GEOVIDE cruise (May/June 2014, R/V Pourquoi Pas?, GEOTRACES GA01), providing the most detailed snapshot of the PREE distribution in the North ...

Distribution, fractionation and sources of rare earth ...

Forty-eight suspended particulate matter (SPM) samples were collected from the Mun River, northeast Thailand and its junction with the Mekong River, to investigate the relationship between the distribution of rare earth elements (REE) in SPM and the soils in the watershed. The total REE contents (∑R …

"Processing and protection of rare earth permanent …

2015-4-21 · Rapid solidification of novel mixed rare earth-iron-boron, MRE2 Fe14B (MRE = Nd, Y, Dy; currently), magnet alloys via high pressure gas atomization (HPGA) have produced similar properties and structures as closely related alloys produced by melt spinning (MS) at low wheel speeds. Recent additions of titanium carbide and zirconium to the permanent magnet (PM) alloy design in HPGA …

Atmospheric Signature and Potential Sources of Rare …

2020-5-15 · 2015). Research of occupational risks related to rare earth elements had shown a possible long-term risk of rare-earth pneumoconiosis in occupational workers based on a large accumulation of REEs in the lungs and lymph nodes of workers (Pietra et al., 1984). Therefore, PM pollution is likely poses a significant threat to human health when exposure

Investigation of rare earth particulate on tribological ...

2021-7-6 · Rare earth particulates are known as the "seed of technology." Due to this in the last few years, the research based on rare earth particulate composite materials and structures (REPCMS) is remarkably increased. In this paper, a review of published papers that are related to mechanical properties along with their microstructure of rare earth composites was done. REPCMS are generally …

Rare earth elements in seawater: particle association ...

1999-2-1 · Rare earth elements and Y were measured with an ICP mass spectrometer (Yokogawa PMS-2000) according to the method described in Shabani et al. (1992) and Zhang and Nozaki (1996).The method includes a quantitative 200-fold preconcentration of REEs and Y from 1L seawater by solvent extraction using a mixture of HDEHP + H 2 MEHP in heptane and a flow injection ICPMS …

Mixed particulate composition for preparing rare earth ...

This method comprises mixing a particulate rare earth-iron-boron alloy with a particulate transition metal, before the magnetic domain alignment, shape-forming, and sintering steps are undertaken. Suitable rare earth-iron-boron alloys for use in this invention include those discussed in the previously noted paper by Robinson, those by Sagawa et ...

(REE)-Rare earth ...

ZHU Zhaozhou,LIU Congqiang,WANG Zhongliang,LI Jun,ZHOU Zhihua,WANG Shilu.Rare earth element for tracing the source of suspended particulate matter of Lake Chaohu. J. Lake Sci.2006,18(3):267-272. DOI:10.18307/2006.0312

Seawater‐Particle Interactions of Rare Earth Elements and ...

Abstract In the central Arctic Ocean, dissolved rare earth element concentrations ([dREE]) and the neodymium (Nd) isotope compositions are constant throughout the deep water column (>1,000 m water depth), indicating unique conditions among the ocean basins and therefore requiring an investigation of seawater-particle interactions.

Particulate Rare Earth Element behavior in the North ...

Abstract. Particulate concentrations of the fourteen Rare Earth Elements (PREE), yttrium and 232-thorium have been measured in two hundred samples collected in the epipelagic (ca. 0–200 m) and the mesopelagic (ca. 200–1000 m) zones of the North Atlantic, during the GEOVIDE cruise (May/June 2014, R/V Pourquoi Pas ?, GEOTRACES GA01).

Enhancement of single particle rare earth doped NaYF4: …

Enhancement of single particle rare earth doped NaYF4: Yb, Er emission with a gold shell Ling Li, Kory Green, Hans Hallen and Shuang Fang Lim Department of Physics, North Carolina State University, Raleigh, NC 27695, USA E-mail: sfl[email protected] Received 27 July 2014, revised 10 November 2014 Accepted for publication 12 November 2014

Distribution, fractionation and sources of rare earth ...

2021-2-24 · Distribution, fractionation and sources of rare earth elements in suspended particulate matter in a tropical agricultural catchment, northeast Thailand. Please help EMBL-EBI keep the data flowing to the scientific community! Take part in our Impact Survey (15 minutes).

(PDF) Distribution and fractionation of rare earth ...

2021-10-29 · Background. In the river system, the geochemistry of rare earth elements (REEs, a series of elements from La to Lu) in suspended particulate matter (SPM) is …

Particulate rare earth elements distributions, processes ...

2021-1-6 · Particulate rare earth elements distributions, processes and characterisation of nepheloids in the North Atlantic. Science Highlights . 6 January 2021. Lagarde et al. (2020, see reference below) realised the first basin scale section of particulate rare earth elements (PREE) concentrations across the North Atlantic Ocean. Their results reveal ...

Distribution, fractionation and sources of rare earth ...

2021-10-26 · Forty-eight suspended particulate matter (SPM) samples were collected from the Mun River, northeast Thailand and its junction with the Mekong River, to investigate the relationship between the distribution of rare earth elements (REE) in …

Using rare earth elements to constrain particulate organic ...

2016-9-27 · Fluxes of particulate organic carbon (POC) in the East China Sea (ECS) have been reported to decrease from the inner continental shelf towards the outer continental shelf. Recent research has ...

Rare earth elements in suspended particulate material of ...

On a transect between the northwest and northeast Atlantic Ocean (30°N/60°W to 60°N/2°W; June/July 1996) suspended particulate material (SPM) in 24 near-surface water samples (4 to 22 m 3 with SPM concentrations between 32 and 447 mg m -3 ) has been collected using a large volume centrifuge system. The samples have been analyzed for Y, the rare earth elements (REEs), and major inorganic ...

New insights into rare earth element (REE) particulate ...

AbstractCigarette smoking is a well-recognized cause of lung cancer and other diseases and is a major contributor to indoor air pollution in numerous settings worldwide. Most cigarette lighters use rare earth element (REE) mischmetal in their flints in order to aid ignition, and these lighters thus have pyrophoric properties. REE particulate emitted from these lighters presents a complexity in ...

(PDF) Influence of rare earth particulate on the ...

2021-1-18 · rare earth particulate mixture, there is an increase in ultim-ate tensile strength (UTS) which represents the presence and. relatively good dispersion of reinforcement in the molten.

Particulate rare earth element behavior in the North ...

2020-11-14 · 5540 M. Lagarde et al.: Particulate rare earth element behavior concentrations can reach 50nmolL1, while dissolved Fe concentrations do not exceed 2.5nmolL1 (Tonnard et al., 2020). As the size spectrum between the particulate and dis-

Particulate Rare Earth Element behavior in the North ...

2018-10-9 · Particulate Rare Earth Element behavior in the North Atlantic (GEOVIDE cruise) MARION LAGARDE1, NOLWENN LEMAITRE2 HELENE PLANQUETTE3, MELANIE GRENIER1 MOUSTAFA BELHADJ1, CATHERINE JEANDEL1,* 1 LEGOS, Université de Toulouse, Fr. 2 ETH, Zurich, IGP, Zurich, CH. 3 LEMAR, Université de Brest, Fr. * [email protected] The North …

RARE EARTH REGENERATOR MATERIAL PARTICLE, RARE …

A rare earth regenerator material particle and a regenerator material particle group having a high long-term reliability, and a superconducting magnet, an examination apparatus, a cryopump and the like using the same are provided. A rare earth regenerator material particle contains a rare earth element as a constituent component, and in the ...

Combustion synthesis of fine particle rare earth ...

1990-10-1 · OSTI.GOV Journal Article: Combustion synthesis of fine particle rare earth orthoaluminates and yttrium aluminum garnet

Atmospheric Signature and Potential Sources of Rare Earth ...

2016-8-31 · ABSTRACTThe atmospheric signature and potential sources of rare earth elements (REEs) in ambient particulate matter (PM) collected at urban (ZH) and background sites (ZWY) between February 2011 and January 2012 in the Yangtze River Delta region were investigated in this study. The average total concentrations of REEs for TSP, PM10 and PM2.5 were measured to be 11.98, 9.37, …

HESS

17 Jan 2007. 17 Jan 2007 Rare earth element concentrations in dissolved and acid available particulate forms for eastern UK rivers C. Neal C. Neal

Investigation of rare earth particulate on tribological ...

2019-7-1 · Rare Earth Particulate (REP) aluminium alloy composites are fabricated using a high temperature stir-casting machine. Six different samples of Al-6061 alloy composites were fabricated by varying weight percentages of SiC + Al 2 O 3 from 5 wt% to 15 wt% and 0.5 to 2.5 wt% of REP (Ce O 2). To determine the chemical composition of the Al-6061 ...

A Comprehensive Review of Rare Earth Elements Recovery ...

Rare earth elements (REEs) including the 15 lanthanides plus yttrium and scandium have been identified as critical commodities by several international agencies and national governments due to their crucial roles in clean energy, high tech, and national defense …

Distribution, fractionation and sources of rare earth …

2021-2-24 · Forty-eight suspended particulate matter (SPM) samples were collected from the Mun River, northeast Thailand and its junction with the Mekong River, to investigate the relationship between the distribution of rare earth elements (REE) in SPM and the ...