Results 51 to 60 of about 3,194 (203)

A study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphere [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy, 2013
Phase equilibria in 5 mass% “Nb2O5” plane of CaO-Al2O3-SiO2-“Nb2O5” system at 1873 K in an oxygen partial pressure of 1.78×10-6 Pa have been investigated through isothermal equilibration and quenching followed by EPMA examinations.
Yan B., Guo R., Zhang J.
doaj   +1 more source

Investigation of Analog Memristor Characteristics for Hardware Synaptic Weight in Multilayer Neural Network

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
The systematic design of memristor‐based neural network is provided by analog conductance state parameters to accurately emulate the software‐based high‐resolution weight at discrete device level. The requirement of discrete analog conductance of memristor device is measured as ≈50 states with nonlinearity value of ≈0.142 within the deviation range of ...
Jingon Jang, Yoonseok Song, Sungjun Park
wiley   +1 more source

F-doped orthorhombic Nb2O5 exposed with 97% (100) facet for fast reversible Li+-Intercalation

Green Energy & Environment
Orthorhombic Nb2O5 (T-Nb2O5) is attractive for fast-charging Li-ion batteries, but it is still hard to realize rapid charge transfer kinetics for Li-ion storage. Herein, F-doped T-Nb2O5 microflowers (F-Nb2O5) are rationally synthesized through topotactic
Xiaodi Liu, Yufeng Tang, Dan Zhang, Guangyin Liu, Xinwei Luo, Yi Shang, Xiu Li, Jianmin Ma   +7 more
doaj   +1 more source

OBTENÇÃO DE FASE ÚNICA DE PENTÓXIDO DE NIÓBIO POR UMA ROTA SIMPLES E SUA CARACTERIZAÇÃO [PDF]

Química Nova
Brazil has the world’s largest reserve of niobium (~98%) which turns niobium compounds into extremely interesting materials from a strategic point of view in the country. Niobium pentoxide is an n-type semiconductor that presents interesting physical and
Michelle D. A. Lage, Gabriel T. M. Alvarenga, Décio B. F. Neto, Gabriela C. Silva, Cássia R. Souza, Sônia D. F. Rocha   +5 more
doaj   +1 more source

Estudio cinético de la hidrogenación de trans-cinamaldehído sobre catalizadores de Ir/Nb2O5

Revista Facultad de Ingeniería Universidad de Antioquia, 2010
Se estudió la hidrogenación de trans-cinamaldehído sobre catalizadores de Ir/Nb2O5 reducidos en atmósfera de hidrógeno a 473 K (LTR) y a 773 K (HTR). Los catalizadores se caracterizaron por adsorción de N2 a 77 K, quimisorción de H2 a 298 K, TPR y TPD ...
Hugo Alfonso Rojas Sarmiento, José Jobanny Martínez Zambrano, Patricio Alberto Reyes   +2 more
doaj  

Catalytic Pyrolysis of Waste Polystyrene Over Fe–B Composite Catalyst for Enhanced Liquid Fuel Production

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Healthcare derived polystyrene waste represents a growing and under addressed fraction of plastic waste streams due to contamination risks and limited recyclability. This study aims to investigate the valorization of waste polystyrene foam through catalytic and noncatalytic pyrolysis pathways to evaluate product yield distribution and identify
Salman Khan, Zahid Hussain, Bilal Ahmad, Naveed Ahmad, Shohreh Azizi   +4 more
wiley   +1 more source

Valorizing biomass waste glycerol to fuel additive at room temperature using a nanostructured WO3/Nb2O5 catalyst

Catalysis Communications
We developed a nanostructured catalyst consisting of WO3 nanoparticles and Nb2O5 nanorods for efficient glycerol acetalization to produce a fuel additive (solketal) at room temperature.
Suresh Babu Putla, P. Subha, Bhattu Swapna, Nittan Singh, Putla Sudarsanam   +4 more
doaj   +1 more source

Photothermal CO2 Hydrogenation: Reactions, Mechanisms, and Catalyst Design

Carbon Energy, EarlyView.
Reactions, mechanisms, and catalyst design for photothermal CO2 hydrogenation. ABSTRACT Photothermal CO2 hydrogenation has attracted extensive attention because it provides a green and sustainable approach to fuel and chemicals production. The photothermal catalyst plays a critical role in CO2 conversion through a range of reactions.
Shuai Yan, Yuting Wang, Wenhao Zhao, Jinqiang Zhang, Guangyao Chen, Lei Jiang, Yun Wang, Yingquan Chen, Xiong Zhang, Xianhua Wang, Kuo Zeng, Hongqi Sun, Shuxin Ouyang, Yonggang Yao, Haiping Yang, Hanping Chen   +15 more
wiley   +1 more source

Nb-Doped 0.8BaTiO3-0.2Bi(Mg0.5Ti0.5)O3 Ceramics with Stable Dielectric Properties at High Temperature

Crystals, 2017
Nb-doped 0.8BaTiO3-0.2Bi(Mg0.5Ti0.5)O3 ceramics were prepared by conventional solid-state method. The dielectric properties and the structural properties were investigated.
Feng Si, Bin Tang, Zixuan Fang, Shuren Zhang   +3 more
doaj   +1 more source

Harnessing Native Al/Si Impurities in Bamboo Black Liquor for Self‐Templated Closed‐Pore Hard Carbon Anodes

Carbon Energy, EarlyView.
A scalable strategy utilizing native impurities in bamboo lignin black liquor is proposed to construct a closed‐pore, rich hard carbon. Controlled impurity removal and high‐temperature reconstruction enable the conversion of open pores into abundant closed pores, thereby promoting sodium cluster storage.
Zhenbing Sun, Qi Yu, Yujun Li, Lin Zhao, Zhenrui Li, Haifeng Zuo, Qinxuan Shi, Zehui Jiang, Qianli Ma, Xing'e Liu   +9 more
wiley   +1 more source