Results 101 to 110 of about 11,020,427 (276)

Effect of the Addition of Potassium or Lithium on the Columbite Precursor Microstructure

Materials Research, 2002
Pechini method has been used to synthesize MN powders with stoichiometric control. By this method, K and Li-doped MN in the range from 0.1 to 5.0 mol% of dopants have been obtained at relatively lower temperatures than it is possible with the ...
Alberto A. Cavalheiro, Maria A. Zaghete, Carlos O. Paiva-Santos, José A. Varela   +3 more
doaj   +1 more source

Robust Photocatalytic Hydrogen Evolution Over a Conjugated Metal‐Organic Framework Heterojunction

Advanced Science, EarlyView.
We report a conjugated coordination polymer, Cd‐TMT (TMT = 1,3,5‐trimercaptotriazine), featuring an intrinsic molecular‐level charge transport network. The conjugated TMT ligands facilitate strong intra‐ligand charge transfer, while their ordered π‐π stacking along the [111] direction establishes a continuous pathway for directional electron migration,
Chunzhe Wang, Yufei Shan, Ruobing Chu, Lingzhi Yang, Zhanning Liu, Xiaoli Zhang, Jian Tian   +6 more
wiley   +1 more source

A Reitveld quantitative XRD phase-analysis of selected composition of the Sr(0.5+x)Sb(1−x)Fe(1+x)(PO4)3(0 < x < 0.50) system

MATEC Web of Conferences, 2013
Qualitative XRD phase-analysis of four (x = 0.10, 0.20, 0.30, 0.40) selected compositions of the Sr(0.5+x)Sb(1−x)Fe(1+x)(PO4)3(0 < x < 0.50) system was undertaken. XRD data shows the absence of a continuously solid solution.
Aatiq A., Tigha R., Attaoui A., Nadi N., El Bouari A.   +4 more
doaj   +1 more source

High‐Entropy Engineering and External Magnetic Field Modulation Synergistically Enhance the H2S Sensing Performance of Rare‐Earth Perovskite Ferrites

Advanced Science, EarlyView.
A novel high‐entropy perovskite oxide, (Gd0.2Tb0.2Dy0.2Ho0.2Er0.2)FeO3, was successfully synthesized for advanced hydrogen sulfide gas detection. By synergistically coupling high‐entropy‐induced local lattice distortion with weak magnetic field modulation, the tailored material generates abundant active sites. This innovative dual strategy dramatically
Yunfei Wang, Min Zhang, Rui Li, Xiaolong Yao, Zhaofeng Wu, Fengdong Qu, Shan Qiu, Zhenjiang Li   +7 more
wiley   +1 more source

One‐Pot Direct Recycling of Spent LiCoO2 via Synergistic Binder Defluorination and Phase Reconstruction

Advanced Science, EarlyView.
A Li+‐DES system enables targeted defluorination and synergistic repair of spent LiCoO2 cathodes in a single medium. The regenerated material recovers a well‐ordered layered structure with a high capacity of 157.4 mAh g−1 and 83.1% capacity retention after 300 cycles, demonstrating a sustainable and efficient closed‐loop recycling strategy for lithium ...
Yingjie Hu, Songhu Ye, Fan Li, Chunhui Zhong, Bailin Xiang, Yulan Chen, Lili Zhi, Qingxia Liu, Junfeng Li, Zhixiang Chen   +9 more
wiley   +1 more source

6.1% Volumetric Negative Thermal Expansion Induced by the Reversible Reconstructive Phase Transition in Pb‐Free Bi1−xLnxCoO3 (Ln: Lanthanoid)

Advanced Science, EarlyView.
Perovskite‐type oxide lanthanoid‐substituted BiCoO3 exhibits a reversible negative thermal expansion (NTE) originated from the coordination change from the CoO5 pyramid to the CoO6 octahedron due to melting of the dxy orbital ordering in the d6 electron configuration, and the 6.1% volume shrinkage in Bi0.82Nd0.18CoO3 is the largest ever observed in the
Yuki Sakai, Kazuki Takahashi, Shogo Wakazaki, Takumi Nishikubo, Jun Miyake, Takehiro Koike, Teppei Nagase, Takafumi Yamamoto, Kano Hatayama, Masaichiro Mizumaki, Masaki Azuma   +10 more
wiley   +1 more source

Quantitative Phases Analysis by Rietveld method-Application to ceramics [PDF]

, 2004
The aim of this work is to show the possibility of using the Rietveld method for the quantitative phase analysis in refractory materials from X-ray diffraction patterns.
Descamps, J.-C., Gonon, Maurice, Gaki, A.   +2 more
core   +1 more source

Applied Rietveld refinement method in crystal structure determination

, 2019
U ovom radu opisane su teorijske osnove rendgenske difrakcijske analize, objašnjena je Rietveldova metoda te postupak utočnjavanja kristalnih struktura primjenom Rietveldove metode.
Štefanović, Elza
core   +3 more sources

Rietveld and Pair Distribution Function (PDF) analysis School 2025

In crystallography, the Rietveld method revolutionized the way in which we study the structure of materials to understand their properties. It is the aim of this intensive course to impart the Rietveld method in theory and practice.
Paola Disisto
core  

Caracterização estrutural, térmica e óptica da liga semicondutora Ga2Se3 e da liga intermetálica CoxNb1-x amorfa produzidas por mechanical alloyiang: [dissertação] [PDF]

, 2006
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Física.Uma liga nanoestruturada Ga40Se60, foi produzida pela técnica Mechanical Alloying a partir de uma mistura de ...
Souza, Sérgio Michielon de
core