Results 11 to 20 of about 1,972,499 (155)

High-Performance Layered Oxides for Sodium-Ion Batteries Achieved through Combined Aluminum Substitution and Surface Treatment

open access: yesBatteries, 2023
Layered sodium transition metal oxides belong to electrode materials for sodium-ion batteries that combine, in a better way, high performance with environmental requirements. However, their cycling stability is still far from desirable.
Mariya Kalapsazova   +6 more
doaj   +1 more source

Ga-substitution effects on the improper ferroelectric phase transition of Ca8[AlO2]12(MoO4)2

open access: yesOpen Ceramics, 2021
The aluminum-sodalite-type oxide, Ca8[AlO2]12(MoO4)2, shows an improper ferroelectricity below a ferroelectric phase transition temperature around 630 ​K. Here we present effects of a Ga-substitution for Al on ferroelectric properties of Ca8[AlO2]12(MoO4)
Koji Maruyama   +3 more
doaj   +1 more source

Replacing fused calcium-magnesium phosphate with diammonium phosphate increases exchangeable aluminum in acidic sugarcane (Saccharum officinarum L.) soils. [PDF]

open access: yesSci Rep
Recently, Diammonium phosphate (DAP, (NH4)2HPO4) has gradually replaced fused calcium-magnesium phosphate (FCMP) as the primary source of phosphorus in sugarcane fields in China.
Zhang H   +7 more
europepmc   +2 more sources

Effect of Particle Size and Dosing of Polymeric Aluminum Chloride Waste Residue on Cement Mortar

open access: yesGeofluids, 2022
Five particle sizes and six dosages of polymerized aluminum chloride (PAC) residue were taken to prepare polymerized aluminum chloride residue cement mortar (PACRM). The compressive and flexural strengths were tested, and SEM analysis was performed.
Weitao Yang   +6 more
doaj   +1 more source

Structural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19)

open access: yesMaterials Research Express, 2020
We describe the synthesis and characterization of magnetic materials with improved magnetic properties for permanent magnet applications. Sr _1− _x RE _x Al _2 Fe _10 O _19 (RE = La, Ce, Tb, and Dy; x  = 0.0 and 0.1) were prepared by ball milling and ...
Ghada A Al-Garalleh   +3 more
doaj   +1 more source

Aluminum and vanadium co-doping effects on the optical and electrical properties of oriented ZnO films

open access: yesMaterials Research Express, 2021
The fabrication of bifunctional zinc-oxide thin films remains a challenge. Here, we investigate the effects of aluminum-vanadium co-doping on the electrical conductivity and the optical transparency of zinc oxide films.
Takeru Okada   +3 more
doaj   +1 more source

Avaliação de procedimentos de extração dos óxidos de ferro pedogênicos com ditionito-citrato-bicarbonato de sódio Evaluation of pedogenic iron oxide extraction procedures with sodium dithionite-citrate-bicarbonate

open access: yesRevista Brasileira de Ciência do Solo, 2003
Em 20 amostras hematíticas e goethíticas de horizontes B latossólicos, uma de B plíntico, uma de B incipiente e uma de saprolito, foram avaliados dois procedimentos de extração de óxidos de ferro pedogênicos (Fe d) por ditionito-citrato-bicarbonato de ...
A. V. Inda Junior, N. Kämpf
doaj   +1 more source

The Structure and Properties of Sepiolite with Partial Lattice Ions Substituted by Aluminum Ions

open access: yesFrontiers in Chemistry, 2021
Sepiolite was modified with Al3+ via hydrothermal reaction. The substitution amount of Al3+ for Mg2+ and Si4+ located at sepiolite lattice and the influence of substitution amount on the structure, specific surface area, and surface acidity of Al ...
Huiwen Chen   +5 more
doaj   +1 more source

Neutron and X-ray Diffraction Investigation of Crystal Structure and Phase Transition for Na2/3[NiyMnzAl1-y-z]O2 as a Cathode Material for Sodium-ion Batteries [PDF]

open access: yesStruct Dyn
Sodium-ion batteries promise to provide low cost and environmentally friendly energy storage as an alternative to lithium-ion batteries. The P2 layered structured Na2/3[Ni1/3Mn2/3]O2 material offers a high theoretical capacity but suffers rapid fade in ...
Anthony T Pacileo   +2 more
europepmc   +2 more sources

Exploring the Na+ Locations and Al Distributions in SSZ-39 Zeolite by Solid-State NMR Spectroscopy and DFT Calculations

open access: yesChinese Journal of Magnetic Resonance, 2021
The catalytic performance of zeolite SSZ-39 with AEI structure is significantly affected by the locations of its extra-framework cation and aluminum distributions.
Han-di CHEN   +3 more
doaj   +1 more source

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