Evaluation of rare earth (Yb, La) doped (Sm3Fe5O12) garnet ferrite membrane for LT-SOFC

2020 ◽  
Author(s):  
Muhammad Yousaf ◽  
Majid Niaz Akhtar ◽  
M.A.K. Yousaf Shah ◽  
Sajid Rauf ◽  
Naveed Mushtaq ◽  
...  
Keyword(s):  
Rare Earth ◽  
Garnet Ferrite ◽  
La Doped

THE STUDY OF HIGH DIELECTRIC CONSTANT MECHANISM OF La-DOPED Ba0.67Sr0.33TiO3 CERAMICS

2018 ◽  
Vol 25 (02) ◽  
pp. 1850056
Author(s):  
JING XU ◽  
BO HE ◽  
HAN XING LIU
Keyword(s):  
Dielectric Constant ◽  
Rare Earth ◽  
High Dielectric Constant ◽  
Temperature Stability ◽  
Current Voltage ◽  
Microstructure Model ◽  
Bst Ceramics ◽  
High Dielectric ◽  
Rare Earth La ◽  
La Doped

It is a common and effective method to enhance the dielectric properties of BST ceramics by adding rare-earth elements. In this paper, it is important to analyze the cause of the high dielectric constant behavior of La-doped BST ceramics. The results show that proper rare earth La dopant ([Formula: see text]) may greatly increase the dielectric constant of BST ceramics, and also improve the temperature stability, evidently. According to the current–voltage ([Formula: see text]–[Formula: see text]) characteristics, the proper La-doped BST ceramics may reach the better semiconductivity, with the decrease and increase in La doping, the ceramics are insulators. By using the Schottky barrier model and electric microstructure model to find the surface or grain boundary potential barrier height, the width of the depletion layer and grain size do play an important role in impacting the dielectric constant.

Magnetic characteristics and optical band alignments of rare earth (Sm+3, Nd+3) doped garnet ferrite nanoparticles (NPs)

2020 ◽  
Vol 46 (10) ◽  
pp. 16524-16532 ◽  
Author(s):  
Muhammad Yousaf ◽  
Asma Noor ◽  
Shuai Xu ◽  
Majid Niaz Akhtar ◽  
Baoyuan Wang
Keyword(s):  
Rare Earth ◽  
Ferrite Nanoparticles ◽  
Magnetic Characteristics ◽  
Garnet Ferrite ◽  
Band Alignments

Preparation of Rare Earth Doped ZnO Nano Particles and Investigation on their Optical Properties

2011 ◽  
Vol 230-232 ◽  
pp. 992-995 ◽  
Author(s):  
Bing Cheng Xia ◽  
Rui Fang Zhang ◽  
Hua An ◽  
Yan Hong Zhao ◽  
Xiao Jing Wang
Keyword(s):  
Rare Earth ◽  
Axial Direction ◽  
Nano Particles ◽  
Ultraviolet Region ◽  
X Ray ◽  
Transmission Electron ◽  
Doped Zno ◽  
Rare Earth Doped ◽  
La Doped ◽  
Diffuse Spectrum

Rare earth doped ZnO particles were synthesized by low temperature hydrothermal method. They showed fine pin-shaped growing along the C axial direction with the diameter about 9-48 nm. The structures of zinc oxide and La doped ZnO were characterized through X-ray powder diffraction (XRD), transmission electron microscope (TEM), Uv-vis diffuse spectrum (UV – vis DRS). Our results indicated that the doping of La results in the crystal cell of ZnO inflating, the band gap shift up to the ultraviolet region with the increase of La doping concentration.

Rare Earth Element (La) Doped LiNiVO4 as a Cathode Material for Secondary Lithium Ion Cells

1999 ◽  
Vol 315-317 ◽  
pp. 105-112 ◽  
Author(s):  
G.X. Wang ◽  
S. Zhong ◽  
D.H. Bradhurst ◽  
S.X. Dou ◽  
H.K. Liu
Keyword(s):  
Rare Earth ◽  
Cathode Material ◽  
Rare Earth Element ◽  
Earth Element ◽  
Lithium Ion ◽  
Lithium Ion Cells ◽  
La Doped

scholarly journals Direct imaging of dopant sites in rare-earth element-doped permanent magnet and correlated magnetism origin

Nanoscale ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 4385-4393 ◽  
Author(s):  
Xue Zeng ◽  
Junwei Zhang ◽  
Mingsu Si ◽  
Derang Cao ◽  
Xia Deng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Rare Earth Element ◽  
Earth Element ◽  
Spin States ◽  
Direct Imaging ◽  
Tetrahedral Sites ◽  
La Doped

The changes in the spin states of the Fe3+ cations located at the 4f1 tetrahedral sites result in magnetization enhancement of La-doped M-type SrFe12O19 ferrite.

La-doped EuO: A rare earth ferromagnetic semiconductor with the highest Curie temperature

2010 ◽  
Vol 96 (23) ◽  
pp. 232503 ◽  
Author(s):  
H. Miyazaki ◽  
H. J. Im ◽  
K. Terashima ◽  
S. Yagi ◽  
M. Kato ◽  
...  
Keyword(s):  
Rare Earth ◽  
Curie Temperature ◽  
Ferromagnetic Semiconductor ◽  
La Doped

Oxidative Esterification of Methacrolein to Methyl Methacrylate over La Doped Catalyst

2012 ◽  
Vol 512-515 ◽  
pp. 2390-2393
Author(s):  
Gui Hua Li ◽  
An Feng Wang
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Methyl Methacrylate ◽  
Catalytic Performance ◽  
Catalyst Amount ◽  
Oxidative Esterification ◽  
Additional Amount ◽  
La Doped

In this present work, rare earth elements La was added to catalysts for the oxidative esterification of methacrolein (MAL) to methyl methacrylate(MMA). Catalysts were characterized by means of BET techniques. Effects of La proportion, material liquid pH and catalyst amount on catalytic performance were investigated. The results indicated that the addation of La in appropriate proportion could improve the catalyst’s activity. 1.0% was found to be the optimum La additional amount. Under the condition of reation temperature 323K, w%(catalyst) 3.6%, proportion of La in the catalyst 1%, pH of material liquid 10.0 the MMA yield could reached up to 89.8%.

scholarly journals Study the structural and magnetic properties of rare-earth ions (La and Gd) doped Ba0.9575Ca0.0025Ti0.80685Mn0.002475Nb0.002475Zr0.1782O3 (BCTMNZ) ceramics

2015 ◽  
Vol 05 (04) ◽  
pp. 1520001 ◽  
Author(s):  
Radheshyam Rai ◽  
Poonam Kumari ◽  
M. A. Valente
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Hysteresis Loops ◽  
Solid State Reaction Method ◽  
Rare Earth Ions ◽  
Temperature Hysteresis ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
Structural And Magnetic Properties ◽  
La Doped

In this paper, we investigated the influence of rare earth ([Formula: see text] and Gd) doped Ba[Formula: see text]RE[Formula: see text]Ca[Formula: see text]Ti[Formula: see text] Mn[Formula: see text]Nb[Formula: see text]Zr[Formula: see text]O3 (BCTMNZ) ceramics were fabricated by using a conventional solid-state reaction method. The doping effects of La and Gd on the structural and magnetic properties were studied. The structural pattern of the ceramic samples were investigated by X-ray diffraction and the results indicated that both samples shows an orthorhombic structure with pure phase. Strain and crystalline size values for Gd and La doped were 0.31–0.33% and [Formula: see text]–[Formula: see text]m, respectively. The room temperature hysteresis loops were obtained by using a vibrating sample magnetometer. La doped ceramic showed the higher value of magnetization i.e., [Formula: see text]B/f.u. as compared to Gd doped BLTMNZ ceramics.

Facile Systhesis La-Doped Nanoceria and Loaded Silver Nanoparticles Scavenging Hydroxyl Radicals

2014 ◽  
Vol 933 ◽  
pp. 23-26
Author(s):  
Kun Jie Wang ◽  
Ming Liang Li ◽  
Feng Guan ◽  
Hong Xia Li ◽  
Yan Ping Wu
Keyword(s):  
Silver Nanoparticles ◽  
Rare Earth ◽  
High Resolution ◽  
Hydroxyl Radicals ◽  
Energy Dispersive Spectrometer ◽  
Rare Earth Oxides ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
La Doped

In this work, we well performed the silver nanoparticles (AgNPs) supported on rare earth oxides ,which La-doped nanoceria nanocomposites for the scavenging Hydroxyl radicals that used facile and readily synthesized strategy .The complex microstructure nanoparticles were characterized by High resolution transmission electron microsopy (HRTEM), Energy dispersive spectrometer (EDS), X-ray diffraction (XRD). This paper showed AgNPs were immobilized on an functionalized dual-rare earth oxides surface that have a potential in biomedicine like antioxidant, anti-inflammatory, antibacterial and anticancer on perspectives future.

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