Results 31 to 40 of about 7,829 (169)

Understanding the Role of Nb Doping in Modulating Ionic Diffusion Kinetics and Particle Size in Spinel LiMn2O4

Battery Energy, Volume 5, Issue 1, January 2026.
Niobium (Nb) incorporation into spinel LiMn2O4 achieves simultaneous enhancement of ionic diffusion kinetics and particle size. After Nb doping, the overall surface energy decreases, promoting particle growth. Despite the increased particle size, the introduction of niobium significantly improves the rate capability and effectively mitigates ...
Junda Li, Xiaoxia Yang, Jiayong Chen, Guanjie Yan, Bo Wang, Ruimin Qin, Chunliu Li, Yaqiong Su, Zhongzhu Liu, Luanna Silveira Parreira, Robson S. Monteiro, Laijun Liu, Leidang Zhou, Weibo Hua   +13 more
wiley   +1 more source

Niobium‐Based Surface Engineering Enables High Rate and Cycling Stability of High‐Voltage LiNi0.5Mn1.5O4 Cathode

ChemElectroChem, Volume 13, Issue 2, January 2026.
A scalable sol–gel‐assisted strategy is developed to construct a uniform niobium‐based surface coating on high‐voltage LiNi0.5Mn1.5O4 (LNMO) cathodes. The conformal Nb‐rich layer acts as a chemically robust and ionically conductive interphase that suppresses electrolyte oxidation, mitigates Ni/Mn dissolution, and stabilizes the cathode‐electrolyte ...
Jiaqi Ke, Jordan Gatts, Yuan Tan, Boyu Wang, Robson Monteiro, Prayag Biswal, Laisuo Su   +6 more
wiley   +1 more source

O setor mineral brasileiro [PDF]

, 1994
Periodicidade: Irregular. Data de início e fim da publicação: 1994-1995. Descrição baseada em n. 1, out. 1994. A partir de 29/01/1996 passou a ser publicado pela Área de Operações Industriais 2: Gerência Setorial de Mineração e ...
Banco Nacional de Desenvolvimento Econômico e Social (Brasil). Área de Operações Industriais 1. Gerência Setorial de Mineração e Metalurgia, Andrade, Maria Lúcia Amarante de   +1 more
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Freeze‐cast porous alumina tubes for membrane applications: Role of niobium pentoxide in microstructure and gas transport properties

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Freeze‐cast alumina tubes doped with Nb2O5 exhibit aligned and hierarchical porosity, enabling high gas permeance. Nb2O5 promotes liquid‐phase sintering and formation of the AlNbO4 secondary phase, enhancing mechanical strength. The resulting porous supports are suitable for membrane‐based gas separation applications.
Priscila Cristh Fonseca Alves, Débora Guimarães da Silva, Jéssica de Oliveira Notório Ribeiro, Darley Carrijo de Melo, Leonardo dos Santos Pereira, Wander Luiz Vasconcelos   +5 more
wiley   +1 more source

Modelos matemáticos en solidificación: Aplicaciones en metalurgia [PDF]

Publicacions Matemàtiques, 1980
In this paper mathematical models for heat transfer with melting or solidification are considered . These models are variants of the well-known Stefan's problem which are of considerable interest in many fields as metal casting, nuclear reactor safety, purificación of materials ...
openaire   +4 more sources

Comparative Biocompatibility of Portland‐Based Endodontic Cements Containing Niobium and/or Bismuth Oxides in Rat Subcutaneous Tissue

BioMed Research International, Volume 2026, Issue 1, 2026.
Objectives To evaluate the in vitro cytocompatibility and osteogenic potential and the in vivo biocompatibility of two experimental endodontic cements based on Portland cement combined with either Nb2O5 (F6) and/or bismuth oxide (F7) in a rat subcutaneous implantation model. Methods For the in vitro study, MC3T3‐E1 preosteoblastic cells were exposed to
Raphael Victor Silva Andrade, Rafaela Alcindo Silva de Souza Fé, Vladimir Galdino Sabino, Carlos Augusto Galvão Barboza, Maria Luiza Diniz de Sousa Lopes, Nizyara Costa da Silva, Valkleidson Santos de Araujo, Amanda Silveira da Silva, Raimundo Fernandes de Araujo Junior, Naianne Kelly Clebis, Isadora Luisa Gomes da Silva, Pedro Catalão Moura, Sofia Pessanha, Aurigena Antunes de Araújo, Baisakhi Banerjee   +14 more
wiley   +1 more source

Boosting the Power Characteristics of All‐Solid‐State Batteries Through Improved Electrochemical Stability: Site‐Specific Nb Doping in Argyrodite

Carbon Energy, Volume 7, Issue 11, November 2025.
This study demonstrates that site‐specific Nb⁵⁺ doping at the Li sites in argyrodite significantly enhances electrochemical stability with lithium metal, enabling ultra‐fast charging (10 C, 6 min) in all‐solid‐state batteries. The improved interfacial stability, rather than ionic conductivity, is key to high‐power performance.
Yongsun Park, So Yi Lee, Hae‐Yong Kim, Myeongcho Jang, Sunho Ko, Gwangseok Oh, Seung‐Deok Seo, Min Jae You, Hanjun Kim, Minwook Pin, Robson S. Monteiro, Seungho Yu, Kyung‐Wan Nam, Sang‐Cheol Nam, Ohmin Kwon   +14 more
wiley   +1 more source

Enhancing Stability of Microwave‐Synthesized Cs2SnxTi1‐xBr6 Perovskite by Cation Mixing

ChemSusChem, Volume 18, Issue 9, May 5, 2025.
This research introduces a microwave radiation synthesis technique for synthesizing Cs2SnxTi1‐xBr6 lead‐free double perovskite powders. By incorporating Sn4+ cations, the stability of the material is improved, particularly at elevated temperatures and outside conditions.
Emmanuel Reyes‐Francis, Beatriz Julián‐López, Carlos Echeverría‐Arrondo, Jhonatan Rodríguez‐Pereira, Diego Esparza, Tzarara López‐Luke, Jaime Espino‐Valencia, Daniel Prochowicz, Iván Mora‐Seró, Silver‐Hamill Turren‐Cruz   +9 more
wiley   +1 more source

Junção de compactados ferrosos via sinterização por fase líquida [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Florianópolis, 2013.A metalurgia do pó ferrosa é um processo que oferece inúmeras soluções na indústria ...
Becker, Rodrigo Pereira
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Comparison of Novel 1 GPa Low‐Carbon, Low‐Alloyed Steel Produced with Simulated and Laboratory‐Scale Thermomechanical Controlled Processes

steel research international, Volume 96, Issue 3, March 2025.
A laboratory‐scale hot‐rolled Ti–Mo–V–Nb steel with 1 GPa tensile strength is produced, and its microstructure and tensile properties are characterized using advanced analysis techniques and tensile testing. A Gleeble 3800 thermomechanical simulator is used to determine a process window. Results show significant differences in mechanical properties and
Olli Nousiainen, Jaakko Hannula, Sami Saukko, Antti Kaijalainen, Jukka Kömi   +4 more
wiley   +1 more source