Results 11 to 20 of about 3,293 (219)

The effect of the synthesis conditions on structure and photocatalytic activity of Nb2O5 nanostructures [PDF]

Processing and Application of Ceramics, 2018
In this work, niobium pentoxide (Nb2O5) nanoparticles of varying sizes and morphology were synthesized using the controlled precipitation method. Ammonium niobate oxylate hydrate (NH4)H2[NbO(C2O4)3]· 3 H2O was used as a niobium precursor and distilled ...
Caterine Daza Gómez, Jorge Enrique Rodríguez-Páez   +1 more
doaj   +1 more source

Physicochemical Effects of Niobic Acid Addition Into Dental Adhesives

Frontiers in Materials, 2021
The incorporation of metallic oxides in dental adhesives has been a strategy to confer improved radiopacity and physicochemical properties for polymers.
Isadora Martini Garcia, Vicente Castelo Branco Leitune, Gabrielade Souza Balbinot, AbdulRahman A. Balhaddad, AbdulRahman A. Balhaddad, Mary Anne S. Melo, Mary Anne S. Melo, Susana Maria Werner Samuel, Fabrício Mezzomo Collares   +8 more
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Nb2O5 nanoparticles obtained by microwave assisted combustion synthesis under different conditions [PDF]

Processing and Application of Ceramics, 2021
The microwave assisted combustion synthesis (MACS) as a new, quick and low cost synthesis method was used for preparation of niobium pentoxide (Nb2O5) powders. The present paper investigated the effect of reactant concentrations (ammonium niobium oxalate,
Luiz Thaís Marcial, Nakagomi Fabio, Renzetti Reny Angela, Siqueira Guilherme Oliveira   +3 more
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Xanthan Gum as a Carbon Source for Preparation of Carbon-Silicon/Graphite Composite as Anode Materials for Lithium Ion Batteries

International Journal of Electrochemical Science, 2020
Silicon anode materials have advantage of very high theoretical specific capacity (4200 mA h g−1), and low intercalation lithium potential, but disadvantage of huge volume expansion.
Lei Chen, Shuaishuai Liu, Hongjia Guo, Jinfeng Li, Beibei Chen, Hongwei Kang, Quanzhen Huang   +6 more
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Comparative evaluation of bioactivity, fluoride release, shear bond strength, and compressive strength of conventional glass ionomer cement incorporated with three inorganic bioactive nanoparticles: An experimental analysis

Journal of Indian Society of Pedodontics and Preventive Dentistry, 2022
Background: Over the course of four decades, the bioactive materials have changed. They have become more specialized, more manageable, possessing superior qualities.
Pranjali Mahesh Pokharkar, N D Shashikiran, Namrata Gaonkar, Sachin Gugawad, Savita Hadakar, Sonali Waghmode   +5 more
doaj   +1 more source

Magnetic Fluctuations in Niobium Pentoxide

, 2023
Using a spin-polarized muon beam we were able to capture magnetic dynamics in an amorphous niobium pentoxide thin film. Muons are used to probe internal magnetic fields produced by defects. Magnetic fluctuations could be described by the dynamical Kubo-Toyabe model considering a time-dependent local magnetic field.
Krasnikova, Y., Murthy, A. A., Crisa, F., Bal, M., Sung, Z., Lee, J., Cano, A., van Zanten, D. M. T., Romanenko, A., Grassellino, A., Suter, A., Prokscha, T., Salman, Z.   +12 more
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On the Vacuum Reduction of Niobium Pentoxide with Niobium Carbide

Journal of the Japan Institute of Metals, 1962
Using the vacuum process, carbide reduction of niobium pentoxide due to the following reaction was investigated experimentally: Nb/sub 2/O/sub 5/ + 5 NbC = 7 Nb + 5 CO. The mixing ratio of Nb/sub 2/O/sub 5//NbC was varied from 33/67 to 45/55. By means of fluctuation measurements of pressure and temt the reaction began to proceed rapidly above 1700 un ...
Hirozô Kimura, Yasuo Sasaki
openaire   +2 more sources

ÓXIDOS DE NIÓBIO: UMA VISÃO SOBRE A SÍNTESE DO Nb2O5 E SUA APLICAÇÃO EM FOTOCATÁLISE HETEROGÊNEA

Química Nova, 2015
Despite the fact that Brazil is the world’s largest niobium mineral producer, governmental interest in exploration of the mineral leading to more valuable derived materials is scarce, which has reduced the country’s knowledge about a wider range of ...
Osmando F. Lopes, Vagner R. de Mendonça, Fernando B. F. Silva, Elaine C. Paris, Caue Ribeiro   +4 more
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TiO2/Pt-Free DSSC produced with Nb2O5 and Polyaniline: a preliminary study [PDF]

Cerâmica
Solar energy offers an eco-friendly alternative to address global energy challenges. This study develops a cost-effective dye-sensitized solar cell (DSSC) using niobium pentoxide (Nb2O5) as a photoanode and a polyaniline (PANI) composite as a counter ...
Ana Paula da Silva Vieira, Ronald Luiz Castiglioni Davi, Edson Araujo de Almeida, Oscar Rodrigues dos Santos, Jéssica de Lara Andrade, Regiane da Silva Gonzalez, Gideã Taques Tractz   +6 more
doaj   +1 more source

Synthesis of (HfZrTiNbTa)N powders via nitride thermal reduction with soft mechano-chemical assistance

Journal of Advanced Ceramics, 2023
High-entropy nitride powders are one of prerequisite materials for the preparation of high-performance high-entropy nitride ceramics. In this paper, high-entropy (HfZrTiNbTa)N powders were synthesized via nitride (i.e., silicon nitride (Si3N4)) thermal ...
Xiang Liu, Youjun Lu, Qian Xu, Lutong Yang, Hongfang Shen, Wenzhou Sun, Xiao Zhang, Yanmin Wang   +7 more
doaj   +1 more source