Results 41 to 50 of about 252,441 (277)

Structural studies into AM(_2)O(_7) framework materials and parametric Rietveld refinement [PDF]

, 2006
This thesis investigates the structural properties of the AM2O7 family of materials, many of which show interesting thermal expansion properties and remarkably complex structures.
Stinton, Graham William
core  

Robust Electrocaloric Performance Enabled by Highly‐Polar Frustrated Nanodomains in NaNbO3‐Based Ferrodistortive Relaxor

Advanced Functional Materials, EarlyView.
P4bm framework in NaNbO3‐Ba(Ti, Hf)O3 ferrodistortive relaxor entails short‐range and highly‐polar ferrodistortive orders. The abundant highly‐polar orders facilitate to increase entropy change, and robust octahedral oxygen tilt enables to impede thermal perturbations.
Feng Li, Changshun Dai, He Qi, Jiecheng Liu, Xiaoming Shi, Heng Zhou, Qiong Yang, Mingsheng Long, Lei Shan, Chunchang Wang, Jianli Wang, Zhenxiang Cheng   +11 more
wiley   +1 more source

The Rietveld Refinement in the EXPO Software: A Powerful Tool at the End of the Elaborate Crystal Structure Solution Pathway

Crystals, 2018
The Rietveld method is the most reliable and powerful tool for refining crystal structure when powder diffraction data are available. It requires that the structure model to be adjusted is as close as possible to the true structure.
Angela Altomare, Francesco Capitelli, Nicola Corriero, Corrado Cuocci, Aurelia Falcicchio, Anna Moliterni, Rosanna Rizzi   +6 more
doaj   +1 more source

Quantificação de fases argilominerais em matérias-primas cerâmicas pelo método de Rietveld [PDF]

, 2013
Tese (doutorado) - Universidade Federal de Santa Catarina, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Florianópolis, 2013.O método de Rietveld é usado no refinamento das estruturas cristalinas dos materiais na forma de pó e na ...
Santos, Carla Margarete Ferreira dos
core  

Disentangling Bulk and Surface Contributions to Charge and Discharge Fading in High‐Voltage LiCoO2

Advanced Functional Materials, EarlyView.
High‐voltage operation of LiCoO2 accelerates capacity fading through bulk and surface degradation. By introducing a LiTaO3 coating to selectively suppress surface degradation, bulk and surface contributions to charge and discharge fading are decoupled.
Hyungjoon Moon, Sangbin Park, Jaewoo Jung, Seongeun Lee, Chanwoo Jung, Min‐Sik Park, Won‐Sub Yoon   +6 more
wiley   +1 more source

Assessment of Accuracy and Error Sources of the Rietveld Quantitative Phase Analysis Method in Mineral Contents of Evaporites

Yankuang ceshi, 2017
The Rietveld phase quantitative analysis (RQPA) method has been widely applied in geology. In the analysis of evaporite, the evaluation and error control of precision are important factors to improve the quality.
CHEN Ai-qing, XUE Yong, XU Hong-liu, LI Guo-wu   +3 more
doaj   +1 more source

Designing Vanadium‐Based Oxide Electrocatalysts for Water Splitting: Experimental and Mechanistic Insights with Machine Learning

Advanced Functional Materials, EarlyView.
This review establishes structure‐property‐mechanism relationships across six modification strategies for V‐based oxide water‐splitting electrocatalysts: lattice engineering, heteroatom doping, interface engineering, carbon‐based hybridization, morphology engineering, and surface reconstruction and pre‐catalyst design, where dissolution is reframed as ...
Youness El Issmaeli, Amina Lahrichi, Hoje Chun, Rafael Gómez‐Bombarelli, Bruno G. Pollet   +4 more
wiley   +1 more source

Rietveld Refinement for Macromolecular Powder Diffraction

Crystal Growth & Design, 2020
Powder X-ray diffraction (PXRD) has been employed extensively for the structural characterization of materials, quantitative analysis of multicomponent mixtures, phase identification, texture, and ...
Maria Spiliopoulou, Dimitris-Panagiotis Triandafillidis, Alexandros Valmas, Christos Kosinas, Andrew N. Fitch, Robert B. Von Dreele, Irene Margiolaki   +6 more
openaire   +2 more sources

Crystallographic characterization of naturally occurring aragonite and calcite phase: Rietveld refinement

Journal of Saudi Chemical Society, 2023
This research has comprehended the crystallographic characterization of two naturally occurring calcium carbonates phases e.g. aragonite and calcite in Pila globosa (P. globosa) and eggshells respectively.
Md. Sahadat Hossain, Samina Ahmed
doaj   +1 more source

Upcycling Keratin‐Based Textile Waste Into High‐Performance Hybrid Fibers Via Tuning the Interfacial Interactions

Advanced Functional Materials, EarlyView.
Keratin recovered from animal‐hair textile waste is fractionated and blended with cellulose to produce continuously spun hybrid fibers. Selecting the high‐molecular‐weight keratin fraction enables 30 wt.% keratin incorporation while maintaining high strength in dry and wet states.
Mian Zhai, Daniel Van Opdenbosch, Inge Schlapp‐Hackl, Teemu Välisalmi, Markus Linder, Michael Hummel, Wenwen Fang   +6 more
wiley   +1 more source