Search Results - "Montedo, O.R.K."

A review of two-step sintering for ceramics by Lóh, N.J., Simão, L., Faller, C.A., De Noni, A., Montedo, O.R.K.

“…The development of high-density ceramic materials with fine-grained microstructures has been studied to considerably improve their properties for…”
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Controlling efflorescence in geopolymers: A new approach by Simão, L., Fernandes, E., Hotza, D., Ribeiro, M.J., Montedo, O.R.K., Raupp-Pereira, F.

“…Excessive efflorescence in geopolymers can reduce their durability due to reduced compressive and tensile strength, in addition to an aesthetic problem. In…”
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The use of ceramic sludge and recycled glass to obtain engobes for manufacturing ceramic tiles by Nandi, V.S., Raupp-Pereira, F., Montedo, O.R.K., Oliveira, A.P.N.

“…The aim of this work was the valorization of two wastes that are classified as Class I according to the Brazilian Standard ABNT NBR 10004:2004 in order to…”
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Waste-containing clinkers: Valorization of alternative mineral sources from pulp and paper mills by Simão, L., Jiusti, J., Lóh, N.J., Hotza, D., Raupp-Pereira, F., Labrincha, J.A., Montedo, O.R.K.

“…Waste streams generated from pulp and paper mills show high potential to be used as alternatives raw materials for production of clinker. In this context, this…”
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Improving physical properties of cubic InO1.5-stabilized zirconia by alloying with MoO3 by Piva, R.H., Piva, D.H., Montedo, O.R.K., Morelli, M.R.

“…InO1.5-stabilized zirconia (InSZ) possess high ionic conductivity at intermediate temperatures and thus it is a potential candidate for use as electrolyte for…”
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Azeotropic distillation, ethanol washing, and freeze drying on coprecipitated gels for production of high surface area 3Y–TZP and 8YSZ powders: A comparative study by Piva, R.H., Piva, D.H., Pierri, J.J., Montedo, O.R.K., Morelli, M.R.

“…Coprecipitation is a well-established method for synthesizing yttria-stabilized zirconia (YSZ); however, the hard agglomerates formed during the drying stage…”
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Permeability of porous ceramic based on calcium carbonate as pore generating agent by Simão, L., Caldato, R.F., Innocentini, M.D.M., Montedo, O.R.K.

“…This study concerns the processing and characterization of porous ceramics based on low cost mineral raw materials for environmental applications. Three…”
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Evaluation of electrical properties of glass-ceramics obtained from mill scale by Montedo, O.R.K., Alves, I.T., Faller, C.A., Bertan, F.M., Piva, D.H., Piva, R.H.

“…Impedance spectra: (a) G2Z and (b) G1Z. The graphs (c) and (d) represent the imaginary part of the impedance as a function of the logarithm of the frequency…”
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Antibacterial and photocatalytic activity of ZnO nanoparticles from Zn(OH)2 dehydrated by azeotropic distillation, freeze drying, and ethanol washing by Piva, D.H., Piva, R.H., Rocha, M.C., Dias, J.A., Montedo, O.R.K., Malavazi, I., Morelli, M.R.

“…[Display omitted] •Zn(OH)2 was synthesized by precipitation.•Four different dehydration procedures were used to prepare ZnO nanoparticles.•Azeotropic…”
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Mechanical tests and simulation on load sharing in alumina fiber bundles by Neckel, L., Pereira da Silva, J.G., Guglielmi, P., Hotza, D., Al-Qureshi, H.A., Montedo, O.R.K., Bergmann, C.P., Janssen, R.

“…The mechanical behavior of bundles of ceramic fibers exhibits a characteristic rupture process when subjected to tensile known as avalanche failure. This…”
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Development of new geopolymers based on stone cutting waste by Simão, L., Hotza, D., Ribeiro, M.J., Novais, R.M., Montedo, O.R.K., Raupp-Pereira, F.

“…•Stone cutting waste (SW) was used in metakaolin-based geopolymers.•SW introduction affected porosity and composition.•Interaction between MK and SW promoted…”
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Fast-drying of red ceramics: A new evaluating approach based on the combined use of optical dilatometry and thermogravimetric analysis by Nandi, V.S., Zaccaron, A., Wermuth, T.B., Raupp-Pereira, F., Arcaro, S., Bernardin, A.M., Montedo, O.R.K.

“…This study aimed to evaluate the effects of composition and heating rate on the fast-drying (∼60 min) of red ceramics obtained by extrusion using optical…”
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New waste-based supplementary cementitious materials: Mortars and concrete formulations by Acordi, J., Luza, A., Fabris, D.C.N., Raupp-Pereira, F., De Noni Jr, A., Montedo, O.R.K.

“…[Display omitted] •It is possible to add WFA together with pozzolan to obtain a ternary cement.•The addition of WFA decreases the compressive strength of the…”
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Effect of temperature and holding time on the densification of alumina obtained by two-step sintering by Lóh, N.J., Simão, L., Jiusti, J., De Noni Jr, A., Montedo, O.R.K.

“…The two-step sintering technique is a process of controlling the sintering curve, which provides materials with higher density and smaller grain size when…”
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Ceramic shell waste valorization: A new approach to increase the sustainability of the precision casting industry from a circular economy perspective by Oliveira, K.A., Simão, L., Rebouças, L.B., Hotza, D., Montedo, O.R.K., Novaes de Oliveira, A.P., Raupp-Pereira, F.

“…[Display omitted] •Metrics for the advancement of the circular economy were proposed;•Classification, Potentiality, Quantity/viability, and Applicability were…”
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Synthesis of chemically bonded porous ceramics from MgO–C refractory bricks waste by Luza, A.L., Simão, L., Acordi, J., Raupp-Pereira, F., Innocentini, M.D.M., Montedo, O.R.K.

“…Chemically bonded ceramics (CBCs) obtained from industrial waste have attracted great interest in recent years. In the present work, MgO raw material was…”
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Waste valorization of coal mining waste from a circular economy perspective: A Brazilian case study based on environmental and physicochemical features by Acordi, J., Simão, L., Faraco, M.N.S., Borgert, C.H., Olivo, E., Montedo, O.R.K., Raupp-Pereira, F.

“…Mineral coal reserves are distributed across all continents in more than 70 countries. The extraction and industrial processing of these reserves generate…”
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Effect of the crystalline layer on the electrical behaviour of 17.7Li2O·5.2ZrO2·68.1SiO2·9.0Al2O3 glass ceramic monoliths by Montedo, O.R.K., Nuernberg, R.B., Piva, R.H., Jiusti, J., Arcaro, S., Piva, D.H.

“…Li2O–ZrO2–SiO2–Al2O3 (LZSA) glass ceramic systems are usually obtained from powder technology to obtain materials with a low thermal expansion coefficient…”
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Densified alumina obtained by two-step sintering: Impact of the microstructure on mechanical properties by Lóh, N.J., Simão, L., Jiusti, J., Arcaro, S., Raupp-Pereira, F., De Noni, A., Montedo, O.R.K.

“…The impact of the microstructural properties of alumina on its mechanical properties is examined in this study. Furthermore, a comparison of the mechanical…”
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Ballistic performance of Al2O3 mosaic armors with gap-filling materials by Jiusti, J., Kammer, E.H., Neckel, L., Lóh, N.J., Trindade, W., Silva, A.O., Montedo, O.R.K., De Noni, A.

“…Mosaic armors are more easily adaptable to surfaces, may have a lower cost, and maximize the preservation of their ceramic tiles after an impact. Although, the…”
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