Results 31 to 40 of about 35,130 (246)

First-principles thermodynamic modeling of atomic ordering in yttria-stabilized zirconia [PDF]

, 2010
Yttria-stabilized zirconia YSZ is modeled using a cluster expansion statistical thermodynamics method built upon a density-functional theory database. The reliability of cluster expansions in predicting atomic ordering is explored by comparing with the
Dalach, P., Ellis, D. E., van de Walle, A.   +2 more
core   +1 more source

IMPACT OF RARE EARTH OXIDES ON THE STRUCTURE AND ELECTRICAL PROPERTIES OF ZnO-Bi2O3−BASED VARISTOR CERAMICS: A COMPARATIVE ANALYSIS OF Y2O3 AND CeO2

Tạp chí Khoa học
Zinc oxide (ZnO)-based varistor ceramics, incorporating varying amounts of Y2O3/CeO2, were fabricated through a twostep solid-state reaction method involving pre-calcination and subsequent sintering processes.
Nguyen Trung Huy, Nguyen Van Trang, Cao Thi Hong, Nguyen Thi Xuyen, Vo Thi Kieu Anh, Nguyen Quang Duong, Nguyen Tuan Anh, Le Dang Quang, Do Quang Tham*
doaj   +1 more source

Wear and corrosion mechanisms of Ni–WC coatings modified with different Y2O3 by laser cladding on AISI 4145H steel

Science and Engineering of Composite Materials, 2022
In order to evaluate the effect of rare earth Y2O3 on the wear and corrosion properties of WC–Ni composite coatings, X-ray diffraction, scanning electron microscopy(SEM), electrochemical polarization curve, electrochemical impedance spectroscopy (EIS ...
Cao Qizheng, Fan Li, Chen Haiyan, Hou Yue, Dong Lihua, Ni Zhiwei   +5 more
doaj   +1 more source

Excellent performance of W–Y2O3 composite via powder process improvement and Y2O3 refinement

Materials & Design, 2021
In this article, Y2O3-reinforced tungsten composites are fabricated by using an improved wet chemical method combined with the spark plasma sintering (SPS). Triethanolamine (TEA) surfactant addition and an appropriate calcination process are innovatively
Gang Yao, Xuepeng Liu, Zhihao Zhao, Laima Luo, Jigui Cheng, Xiang Zan, Zumin Wang, Qiu Xu, Yucheng Wu   +8 more
doaj   +1 more source

A first-principles study of helium storage in oxides and at oxide--iron interfaces [PDF]

, 2012
Density-functional theory calculations based on conventional as well as hybrid exchange-correlation functionals have been carried out to study the properties of helium in various oxides (Al2O3, TiO2, Y2O3, YAP, YAG, YAM, MgO, CaO, BaO, SrO) as well as at
Allnatt A. R., Mansur L. K., Paul Erhart, Ullmeier H., Wyckoff R.   +4 more
core   +2 more sources

Optical properties of nanocrystalline Y2O3:Eu3+ [PDF]

Journal of Applied Physics, 2005
Optical properties of nanocrystalline red-emitting phosphor, europium-doped yttria (Y2O3:Eu3+), of average particle size of 15nm are investigated. The intensity of the strongest emission line at 612nm is found to be highest in the nanocrystalline sample with 4at.wt% of europium. The narrow electronic emission spectrum suggests a crystalline surrounding
Ray, S., Singha, A., Pramanik, P., Roy, Anushree   +3 more
openaire   +2 more sources

In vivo phytotoxic effect of yttrium-oxide nanoparticles on the growth, uptake and translocation of tomato seedlings (Lycopersicon esculentum)

Ecotoxicology and Environmental Safety, 2022
The potential toxicity and ecological risks of rare-earth nanoparticles in the environment have become a concern due to their widespread application and inevitable releases.
Xueping Wang, Xiaojie Liu, Xiao Yang, Lingqing Wang, Jun Yang, Xiulan Yan, Tao Liang, Hans Chr. Bruun Hansen, Balal Yousaf, Sabry M. Shaheen, Nanthi Bolan, Jörg Rinklebe   +11 more
doaj   +1 more source

Sintering, microstructural and mechanical characterization of combustion synthesized Y2O3 and Yb3+-Y2O3

Journal of the Ceramic Society of Japan, 2009
The present work highlights the microstructural features and mechanical properties of Y2O3 prepared with and without Yb3+ doping that processed through combustion synthesis involving various organic fuels such as urea, citric acid and glycine. Properties such as powder-flow, particle packing, green density, % of shrinkage, sintered density, grain size,
Viswanathan Mangalaraja, Ramalinga, Ananthakumar, Solaiappan, Mouzon, Johanne, Lopez, Marta, Porro Camurri, Carlos, Oden, Magnus   +5 more
openaire   +4 more sources

Catalysis AI Agent Guides Discovering the Universal Design Principle of Cu‐Based Single‐Atom Alloy Catalysts for CO2 Electroreduction

Angewandte Chemie, EarlyView.
Artificial intelligence (AI) enables the systematic analysis and comparative evaluation of experimental and theoretical data, optimizes the catalytic reaction research workflow, and accelerates the discovery of high‐performance electrocatalysts. ABSTRACT Copper (Cu)‐based single‐atom alloys (SAAs) represent a promising strategy for optimizing the ...
Xuning Wang, Zhong Li, Di Zhang, Hao Li, Haoxiang Xu, Daojian Cheng   +5 more
wiley   +2 more sources

Preparation of nanocrystalline AlN ceramics by spark plasma sintering

Fenmo yejin jishu
AlN ceramics were prepared by spark plasma sintering (SPS) using the pure nano-AlN powders and the nano-AlN powders doped by 3% Y2O3 (mass fraction) as the raw materials.
ZHAO Dongliang, HE Qing, ZHU Zaiwen, YIN Haiqing, QIN Mingli   +4 more
doaj   +1 more source