|
|
|
|
|
Shunqi Mei, Yanwei Zhang, Quan Zheng, Yu Fan, Burial Lygdenov and Alexey Guryev
The compound boronizing of H13 steel sample was carried out by adding rare earth CeO2, and the effects of main parameters of compound boronizing on the properties of the boronizing layer were investigated. The boronizing kinetics were also analyzed. Unde...
ver más
|
|
|
|
|
|
|
|
|
|
|
Timothy Ault, Steven Krahn and Allen Croff
Energy industries account for a significant portion of total rare earth usage, both in the US and worldwide. Rare earth minerals are frequently collocated with naturally occurring radioactive material, imparting an occupational radiological dose during r...
ver más
|
|
|
|
|
|
|
|
|
|
|
Wiem Bouslama, Ramzi Nasser, Bernard Gelloz, Amira Ben Gouider Trabelsi, Fatemah Homoud Alkallas, Ji-Ming Song, Ezzeddine Srasra and Habib Elhouichet
Undoped and codoped (Eu/Na) ZnO nanocrystals (NCs) were successfully manufactured through an economical sol-gel method. X-ray diffraction (XRD) analysis demonstrated pure hexagonal wurtzite structure without secondary phases for all the samples. The size...
ver más
|
|
|
|
|
|
|
|
|
|
|
Pu Zhang, Zhe Zhang, Lihua Liang, Lei Li, Chenyang Cao and R. Lawrence Edwards
The provenance of lake particulate matter in environmentally sensitive areas is crucial to understanding regional environmental and climatic changes. This study investigated two regions in the Northeast Tibetan Plateau, China: Region I (Keluke, Tuosu, an...
ver más
|
|
|
|
|
|
|
|
|
|
|
Andrés Cardenas, Maria I. Dias, Catarina Diamantino, Edgar Carvalho, Dulce Russo and Rosa Marques
New insights about the geochemical behavior of actinides and lanthanides in an old uranium mine are provided for the first time in this work. Fifteen samples (water, soil, and sediments) were collected inside and outside the Quinta do Bispo old mine (Por...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alexander M. Panichev, Natalya V. Baranovskaya, Ivan V. Seryodkin, Igor Y. Chekryzhov, Bulat R. Soktoev, Vladimir V. Ivanov, Elena A. Vakh, Tatyana V. Desyatova, Tatyana N. Lutsenko, Nikita Y. Popov, Alexey V. Ruslan, Evgeniy V. Elovskiy, Alena V. Vetoshkina, Olga V. Patrusheva, Dmitry S. Ostapenko, Aleksei S. Kholodov and Kirill S. Golokhvast
From the novel results of comprehensive geological?hydrobiogeochemical studies conducted on Olkhon Island (Lake Baikal), it follows that the phenomenon of geophagy among wild and domestic ungulates on the island is caused by the deficiency of light subgr...
ver más
|
|
|
|
|
|
|
|
|
|
|
Michail V. Shaldybin, Svetlana Kvachko, Maxim Rudmin, Alexey Plyusnin and Iliya Kuznetsov
Fine-grained strata deposited on the Eastern Siberian craton are predominantly considered to mainly consist of Neoproterozoic sandstones. Clastic rocks near the unconformity border of the Ediacaran and the Riphean are represented by sandstone and siltsto...
ver más
|
|
|
|
|
|
|
|
|
|
|
Nikita Tananaev
Major ions, stable isotopes, and trace elements, including rare earth elements (REEs), are used as natural tracers in the qualitative assessment of potential water sources in lakes and rivers of the upper Yana River basin, between Verkhoyansk and Chersky...
ver más
|
|
|
|
|
|
|
|
|
|
|
Zhongrong Qiu, Chunhui Tao, Weilin Ma, Ágata Alveirinho Dias, Siyi Hu, Yuexiao Shao, Kehong Yang and Weiyan Zhang
The geochemistry and mineralogy of sediments provide relevant information for the understanding of the origin and metallogenic mechanism of ferromanganese nodules and crusts. At present, there are still few studies on the sediment origin of the Clarion?C...
ver más
|
|
|
|
|
|
|
|
|
|
|
Jiao Qu, Juanjuan Liu and Qi Zhu
Developing an efficient approach to improve the luminescence of the phosphors without heating processing is a challenge, but attracts much attention. In the present paper, prismatic microcrystals of RE4O(OH)9NO3 (RE = Y, Eu) were synthesized by a hydroth...
ver más
|
|
|
|
|
|
|
|
|
|
|
Lingyao Meng, Jian Shang, Mengjiu Zhang, Aijun Xie and Yue Zhang
In this paper, rare-earth vanadiumizing layers were prepared on the surface of GCr15 steel by powder pack cementation. The tissue thicknesses of the vanadiumizing layers were characterized by metallographic microscopy, scanning electron microscopy, X-ray...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ikram Ahmad, Muhammad Asghar Jamal, Miara Iftikhar, Awais Ahmad, Shahid Hussain, Humaira Asghar, Muhammad Saeed, Ammar Bin Yousaf, Rama Rao Karri, Nada Sulaymaniyah Al-kadhi, Mohamed Ouladsmane, Ayman Ghfar and Safia Khan
This work intended to enhance the unique and outstanding properties of lanthanum by synthesizing its nanocomposite. A lanthanum-based nanocomposite was prepared by a simple and cost-effective ?co-precipitation? method. Lanthanum nitrate (La (NO3)3) and z...
ver más
|
|
|
|
|
|
|
|
|
|
|
Fenlian Wang, Gaowen He, Xiguang Deng, Yong Yang and Jiangbo Ren
Rare earth elements and yttrium (REY) are widely recognized as strategic materials for advanced technological applications. Deep-sea sediments from the eastern South Pacific and central North Pacific were first reported as potential resources containing ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Armanda Cruz, Pedro A. Dinis, Alberto Gomes and Paula Leite
The rare-earth element (REE) geochemistry of sedimentary deposits has been used in provenance investigations despite the transformation that this group of elements may suffer during a depositional cycle. In the present investigation, we used the geochemi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Dóra Buzetzky, Noémi Csilla Tóth, Noémi M. Nagy, József Kónya
Pág. 113 - 121
Four modified bentonites (La(III), Ce(III), Y(III), Fe(III)) were prepared by ion exchange process to remove arsenite (III) ions from water. The modified bentonites were examined with X-ray fluorescence spectroscopy (XRF) and X-ray diffraction (XRD). The...
ver más
|
|
|
|
|
|
|
|
|
|
|
Chunying Wang, Ting Zeng, Sipin Zhu and Chuantao Gu
Rare earth elements are plentiful in Gannan area, China, and there is a large amount of wastewater from all kinds of mines. In this paper, rare-earth modification TiO2 composites (RE/TiO2, RE = La, Ce, Gd, Yb) was studied by theory computation and experi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Shih-Ying Chang, Jun-Yen Lee, Yan-Hua Huang and An-Ban Wu
In this study, AZ31 magnesium alloy and 6061 aluminum alloy were joined with Sn-xZn (x = 5, 10, 20 and 30 wt.%) fillers containing trace rare earth elements at 250 °C in air without the use of flux or a wetting layer. The bond shear strengths of AZ31 mag...
ver más
|
|
|
|
|
|
|
|
|
|
|
Henar Moran-Palacios, Francisco Ortega-Fernandez, Raquel Lopez-Castaño and Jose V. Alvarez-Cabal
Rare earths have appeared in the market with new energy and Information Technology and Communications (ITC) applications. While their demand grows exponentially, their production is experiencing a bottleneck given that their deposits are concentrated in ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alexandra Leader and Gabrielle Gaustad
Clean energy technologies have been developed to address the pressing global issue of climate change; however, the functionality of many of these technologies relies on materials that are considered critical. Critical materials are those that have potent...
ver más
|
|
|
|
|
|
|
|
|
|
|
Martin Makombe, Charlton Van der Horst, Bongiwe Silwana, Emmanuel Iwuoha and Vernon Somerset
The increasing demand for rare earth elements in green technology, electronic components, petroleum refining, and agricultural activities has resulted in their scattering and accumulation in the environment. This study determined cerium, lanthanum and pr...
ver más
|
|
|
|
|
|