Feldspar
Mostrando 1-12 de 80 artigos, teses e dissertações.
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1. Effects of the addition of graphene on the compressive strength of geopolymeric mortar developed from k-feldspar mining waste
Abstract Contemporary organizations are showing a growing interest in the reuse of solid waste from industrial processes with the intention of reducing environmental impacts and reducing costs. The mining activity is one of the main waste generators in Brazil. In parallel, geopolymeric materials have been gaining prominence in studies that make it a possible
REM, Int. Eng. J.. Publicado em: 2021-09
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2. Technological innovation in Córrego do Sítio Mineração - A study of technical and economic aspects by using sensor-based sorting for refractory gold ore
Abstract The mining sector has a fundamental financial and economical role in the country where it practices these activities. In addition to employment creation and social-cultural development, the mining sector brings economic growth to the country. However, the sector is facing challenges due to COVID-19, incidents involving tailings dam facilities, risin
REM, Int. Eng. J.. Publicado em: 2021-01
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3. Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data
Abstract Beryl is usually found in granite-pegmatite systems. The addition of chromophore elements (V, Cr, Mn, Fe) into the crystalline structure favors color changes in beryl and thus generates some of the world’s expensive gems such as emerald, morganite, heliodor and aquamarine. The Massangana polyphasic batholith is a well-known cassiterite, wolframite
REM, Int. Eng. J.. Publicado em: 2020-09
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4. Potassium recovery from Brazilian glauconitic siltstone by hydrothermal treatments
Abstract Silicate rock Verdete, collected in the central region of Minas Gerais state (Brazil) and composed mostly of micas (glauconite and muscovite) and tectosilicates (K-feldspar and quartz), was hydrothermally treated with several reactants in order to release and recover potassium. The hydrothermal products were characterized by flame photometry, XRD, X
REM, Int. Eng. J.. Publicado em: 2020-06
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5. The Tatuí Formation as a source of raw material in the ceramic pole of Santa Gertrudes (SP)
Abstract The importance of the Santa Gertrudes Ceramic Complex (SGCC) in the ceramic market is directly associated with the high quality of the Corumbataí Formation clays used in the manufacture of its products. Although the volumetric capacity of the Corumbataí Formation is able to meet the SGCC demand for the coming years, its industries are always in se
REM, Int. Eng. J.. Publicado em: 2020-03
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6. Influence of hydrofluoric acid etching time and concentration on shear bond strength of metal brackets to ceramic surfaces
Resumo Introdução O tratamento de superfície prévio a colagem de braquetes a cerâmica com ácido fluorídrico, é indicado devido a sua capacidade de promover alterações morfológicas necessárias para a adesão. Objetivo Avaliar a resistência de união ao cisalhamento (RUC) de braquetes metálicos unidos à superfície cerâmica feldspática sob a
Rev. odontol. UNESP. Publicado em: 13/12/2019
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7. Restorative Possibilities Using Zirconia Ceramics for Single Crowns
Resumo Dois casos clínicos são apresentados para explorar as diferenças técnicas e discutir as vantagens e desvantagens de se utilizar zircônia com cerâmica estratificada ou monolítica para confeccionar coroas unitárias. O primeiro caso descreve os passos clínicos na confecção de uma coroa monolítica no segundo pré-molar esquerdo utilizando uma
Braz. Dent. J.. Publicado em: 07/10/2019
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8. The role of airborne geophysics in the investigation of gold occurrences in the Itapetim Region, Borborema Province, Northeast Brazil
Abstract We present a combined analysis of airborne geophysical data (magnetics and gamma-ray spectrometry) and field aspects of Itapetim lode gold district region, aiming to identify structurally deformed and hydrothermally altered zones, which are suggestive of gold mineralized sectors. The main geophysical lineaments are oriented in the NE-SW and E-W dire
Braz. J. Geol.. Publicado em: 22/08/2019
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9. Use of Firewood Ash Waste in Electrical Siliceous Porcelain
The use of firewood ash waste for the production of electric porcelain can represent an important technological and environmental alternative for the final disposal of this abundant solid waste material. This work aims to study the effect of replacing of sodium feldspar (albite) for firewood ash waste in electrical siliceous porcelain formulation. The firewo
Mat. Res.. Publicado em: 05/08/2019
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10. Caracterização de argilas de novos jazimentos situados em Parelhas/RN, Brasil, visando aplicação na indústria cerâmica
RESUMO O Estado do Rio Grande do Norte, mais especificamente no município de Parelhas, Brasil, a indústria cerâmica já é bastante consolidada, crescendo ano após ano. Entretanto, o estímulo do setor tem provocado acelerada exaustão das jazidas de argilas locais utilizadas pela indústria e, por conseguinte, ameaçando a manutenção da indústria cer
Matéria (Rio J.). Publicado em: 10/06/2019
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11. Characterization of Algerian kaolins for utilization as a raw material in electrical insulators
Resumo O objetivo desta investigação foi caracterizar três amostras de caulim (DD1, DD2 e DD3) coletadas do depósito de Djebel Debbagh (leste da Argélia) para serem utilizadas em isoladores elétricos de porcelana. Análise granulométrica, fluorescência de raios X, difração de raios X, microscopia eletrônica de varredura e análise térmica (TG-ATD
Cerâmica. Publicado em: 06/06/2019
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12. Evaluation of the contributions of possible sources to the leucosome of the diatexite of Socorro-Guaxupé Nappe, in the Alfenas Region, MG, Brazil
Abstract The Socorro-Guaxupé Nappe crops out in southern Minas Gerais and it has an intermediate unit called Metaxite Unit, dominated by diatexites at its base, with large volumes of leucosome and schollen of stromatic garnet-biotite metatexite. Leucosome within the schollen crystallized via fractional crystallization and is dominated by plagioclase and qua
Braz. J. Geol.. Publicado em: 08/04/2019