Molten Salt
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Molten Salt Synthesis of Bi2WO6 Powders and its Visible-Light Photocatalytic Activity
Bi2WO6 powders were synthesized by the molten salt method at 250-350 ºC using the mixture of Bi(NO3)3·5H2O and Na2WO4·2H2O as a precursor, and the mixture of LiNO3 and NaNO3 with a molar ratio of 27:33 as a molten salt, respectively. The effects of temperature and salt amount on the phase composition, morphology and photocatalytic activity under the visib
Mat. Res.. Publicado em: 21/10/2019
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2. The influence of Cu content on high temperature corrosion behavior of heat - resistant molten salt steel
ABSTRACT This work studies the high temperature corrosion behavior of new heat-resistant steel with salt coating method of 75%Na2SO4+25%NaCl coating on the steel surface at 700ºC. The chemical composition of corrosion products and surface morphology of the corrosion layer were analyzed using X-ray diffractometer (XRD), scanning electron microscopy (SEM), en
Matéria (Rio J.). Publicado em: 16/09/2019
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3. Boro-Austempering Treatment of Ductile Cast Irons
Samples of ductile cast irons alloyed with Cu, Cu-Ni and Cu-Ni-Mo were austempered, borided and boro-austempered and characterized for hardness and micro-adhesive wear behavior. The kinetics of layer formation was also studied. The boriding method used was molten borax bath, in periods of 2 and 4 hours at temperatures of 850, 900 and 950 ºC. The direct aust
Mat. Res.. Publicado em: 16/07/2018
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4. The influence of natural clay and organoclay vermiculite on the formation process of bionanocomposites with poly (3-hydroxybutyrate-co-3-hydroxyvalerate)
ABSTRACT During the last decades, a lot of research work focused on several biodegradable and biosourced polyesters for the purpose of reducing the non-degradable polymer wastes. These polyesters are particularly considered to be promising polymers for biomedical applications and short life-time products like packaging. As these packagings are rapidly discar
Matéria (Rio J.). Publicado em: 02/10/2017
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5. Preparation of Zinc Oxide-Nanoclay Hybrids by Alkaline Ion Exchange Method
Abstract ZnO/nanoclay hybrids are synthesized by a single-step solid-state reaction using ZnCl2 as a reagent. These hybrids were prepared by a simple alkaline ion exchange method, without using any surfactant or chelating agents. By adjusting the reagent’s immersion time in molten salt, production of pure ZnO/nanoclay hybrids was achieved. Synthesized hybr
Braz. J. Chem. Eng.. Publicado em: 2017-10
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6. Influence of the Addition of Montmorillonite in an Epoxy Powder Coating Applied on Carbon Steel
AbstractPolymer coatings have been used for the corrosion protection of metal surfaces acting as a physical barrier against several corroding media. In spite of the good efficiency of these coatings their resistance is limited due to the presence of localized defects which give place to localized corrosion. Aiming to improve the barrier properties of these c
Mat. Res.. Publicado em: 2015-10
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7. Hot corrosion behavior of monel 400 and AISI 304 dissimilar weldments exposed in the molten salt environment containing Na2SO4 + 60% V2O5 at 600 °C
This research work investigates the use of pulsed current for joining two dissimilar metals Monel 400 and AISI 304 using Pulsed Current Gas Tungsten Arc welding using three different filler metals such as ER309L, ERNiCu-7 and ERNiCrFe-3. Microstructure observations showed the presence of Partially Melted Zone (PMZ) at the heat affected zone (HAZ) of all the
Mat. Res.. Publicado em: 22/09/2014
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8. Matriz tridimensional polimérica com adição de cerâmicas para reconstruções ósseas / Polymers scaffolds with addition of ceramics for use in bone reconstruction
A engenharia tecidual, que tem como objetivo a reconstrução de tecidos de animais, enfrenta um desafio: a construção de suportes. Uma das propriedades relevantes desse eventual material é a sua taxa de absorção, que deve ser inversamente proporcional à taxa de crescimento tecidual. Nesse sentido, a poli ( -caprolactona) (PCL), que é um polímero bio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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9. Síntese e caracterização de silicatos dopados com ións Cd2+ e Eu3+ pelo método do sal fundido com menor temperatura / Synthesis and Characterization of Silicates Doped with ions Cd2+ and Eu3+ by the Molten Salt Method by Lower Temperature
Neste trabalho tivemos como objetivo sintetizar e caracterizar os ortossilicatos de elementos alcalino-terrosos com destaque para o Sr2SiO4, uma matriz hospedeira para íons dopantes como o cádmio II e o európio III, resultando em materiais com propriedades luminescentes. Outro objetivo é reduzir a temperatura de síntese pelos métodos aqui empregados em
Publicado em: 2010
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10. Planar waveguides by ionic exchange in glasses tellurite doped with ions of erbium / Guias de onda por troca ionica em vidros teluritos dopados com ions de erbio
This work reports the preparation of planar waveguides by ionic exchange in glasses tellurite doped with íons of erbium whose compositions are, 14Na2O-25W O3 - 60TeO2 - 1Er2O3 (mol%) and 2GeO2 - 10N a2O - 12ZnO - 75TeO2 - 1Er2 O3 (mol%), have been prepared multi-mode and single-mode waveguides, the depths of the waveguides can be controlled by the variation
Publicado em: 2003
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11. Oxidação de etanol a acetaldeido sobre catalisador de cobre oxidado
During its initial stage of development Brazil, Ethanolchemistry will certainly be developed along the traditional chemical routes, as the conventional acetic acid and derivatives from aceta1gehyde. This work involves the kinetic study of ethanol oxidation to acetaldehyde over an oxidized copper catalyst, whose results are used in the simulation of an indust
Publicado em: 1984
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12. Salt-induced formation of the molten globule state of cytochrome c studied by isothermal titration calorimetry.
Although the molten globule state has been proposed as a major intermediate of protein folding, it has proven difficult to obtain thermodynamic data characterizing this state. To explore another approach for characterizing the molten globule state, salt-induced formation of the molten globule state of horse cytochrome c at pH 1.8 was studied by isothermal ti