Listar QICM - Artículos por título
Mostrando ítems 120-139 de 149
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Rietveld Quantitative Phase Analysis of Oil Well Cement: in Situ Hydration Study at 150 Bars and 150 °C
Fraga, Edmundo; Cuesta-Garcia, Ana Maria; Zea-Garcia, Jesus D.; Gomez-de-la-Torre, Maria de los Angeles
; Yañez-Casal, Armando; García-Aranda, Miguel Ángel[et al.] (MDPI - Publisher of Open Access Journals, 2019-06)
Oil and gas well cements are multimineral materials that hydrate under high pressure and temperature. Their overall reactivity at early ages is studied by a number of techniques including through the use of the consistometer. ... -
Rietveld Quantitative Phase Analysis of OPC Clinkers, Cements and Hydration Products
García-Aranda, Miguel Ángel; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura (Mineralogical Society of America, 2012)
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Rietveld quantitative phase analysis of yeelimite-containing cements
Álvarez-Pinazo, Gema; Cuesta-Garcia, Ana Maria; García-Maté, Marta; Santacruz-Cruz, Maria Isabel; Ramirez-Losilla, Enrique; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura; García-Aranda, Miguel Ángel[et al.] (Karen Scrivener, 2012)
Yeelimite-containing cements are attracting attention for their tailored properties. Calcium sulfoaluminate, CSA, cements have high contents of Yeelimite and they are used for special applications. Belite calcium sulfoaluminate, ... -
Rietveld quantitative phase analysis of Yeelimite-containing cements
Álvarez-Pinazo, Gema; Cuesta-Garcia, Ana Maria; García-Maté, Marta; Santacruz-Cruz, Maria Isabel; Ramirez-Losilla, Enrique; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2012-03-26)
Yeelimite-containing cements are attracting attention for their tailored properties. Calcium sulfoaluminate, CSA, cements have high contents of Yeelimite and they are used for special applications. Belite calcium sulfoaluminate, ... -
Rietveld quantitative phase analysis with molybdenum radiation
Cuesta-Garcia, Ana Maria; Álvarez-Pinazo, Gema; García-Maté, Marta; Santacruz-Cruz, Maria Isabel; García-Aranda, Miguel Ángel; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura[et al.] (Cambridge Core, 2014)
Building materials are very complex samples of worldwide importance; hence quantitative knowledge of their mineralogical composition is necessary to predict performances. Rietveld quantitative phase analysis (RQPA) allows ... -
Selective Catalytic Reduction of NOx by CO over Cu(Fe)/SBA-15 Catalysts: Effects of the Metal Loading on the Catalytic Activity
Souza, Monique S.; Martins, Antonio J.; Ribeiro, Jackson Anderson S.; Campos, Adriana; Oliveira, Alcineia C.; Jucá, Raí F.; Saraiva, Gilberto D.; Rodriguez-Castellon, Enrique; Araujo, Rinaldo S.[et al.] (IOAP-MDPI, 2023-03-04)
Mesoporous Cu(Fe)/SBA-15 catalysts were prepared with distinct metal loadings of ca. 2–10 wt.%. A detailed set of characterizations using X-ray diffraction (XRD), electron paramagnetic resonance (EPR), transmission electron ... -
Selective Conversion of Glucose to 5-Hydroxymethylfurfural by Using L-Type Zeolites with Different Morphologies
Ginés-Molina, María José; Ahmad, Nur Hidayahni; Mérida-Robles, Sandra; Garcia-Sancho, Cristina; Mintova, Svetlana; Ng, Eng-Poh; Maireles-Torres, Pedro Jesús[et al.] (MDPI, 2019-12-16)
In the present work, the morphology of L-type zeolite (LTL topology) has been modified in order to evaluate the influence of several protonated-form LTL-zeolites with different morphologies on their stability and catalytic ... -
Stability and electrochemical performance of nanostructured La2CuO4þd cathodes
Dos Santos-Gómez, Lucía; Porras-Vazquez, Jose Manuel; Hurtado, Javier; Losilla, Enrique R.; Marrero-López, David (Elsevier, 2019-02-21)
La2CuO4þd cathode layers are prepared by spray-pyrolysis deposition and their structural, microstructural and electrical properties are compared with those of submicrometric powders obtained from freeze-dried precursors. ... -
Structural and Proton Conductivity Studies of Fibrous π-Ti2O(PO4)2·2H2O: Application in Chitosan- Based Composite Membranes
Babaryk, Artem A.; Adawy, Alaa; García, Inés; Trobajo, Camino; Amghouz, Zakariae; Perez-Colodrero, Rosario Mercedes; Cabeza-Diaz, Aurelio; Olivera-Pastor, Pascual; Bazaga-García, Montse; Dos Santos-Gómez, Lucía[et al.] (The Royal Society of Chemistry, 2021)
Although the fibrous polymorphic modification of titanium phosphate, π-Ti2O(PO4)2·2H2O (π-TiP) is known for decades, its crystal structure has remained unsolved. Herewith we report the crystal structure of π-TiP at a room ... -
Structural Mapping and Framework Interconversions in 1D, 2D, and 3D Divalent Metal R,S-Hydroxyphosphonoacetate Hybrids
Perez-Colodrero, Rosario Mercedes; Olivera-Pastor, Pascual; Cabeza-Diaz, Aurelio; Papadaki, M.; Demadis, Konstantinos D.; G. Aranda, Miguel Ángel[et al.] (American Chemical Society, 2009-12-16)
Reactions of divalent cations (Mg2þ, Co2þ, Ni2þ, and Zn2þ) with R,S-hydroxyphosphonoacetic acid (HPAA) in aqueous solutions (pH values ranging 1.0-4.0) yielded a range of crystalline hydrated M-HPAA hybrids. Onedimensional ... -
Structural variability in M2+ 2-hydroxyphosphonoacetate moderate proton conductors
Perez-Colodrero, Rosario Mercedes; Salcedo, Inés R.; Bazaga-García, Montse; Milla-Pérez, Diego F.; Durán-Martín, Jonatan D.; Ramirez-Losilla, Enrique; Moreno-Real, Laureano; Rius, Jordi; García-Aranda, Miguel Ángel; Demadis, Konstantinos D.; Olivera-Pastor, Pascual; Cabeza-Diaz, Aurelio[et al.] (De Gruyter, 2017)
The structural variability of two series of Mg2+- and Zn2+- 2-hydroxyphosphonoacetates have been studied in the range of 25–80 °C and 95 % relative humidity in order to correlate the structure with the proton conductivity ... -
Structural Variability in Multifunctional Metal Xylenediaminetetraphosphonate Hybrids
Perez-Colodrero, Rosario Mercedes; Angeli, Giasemi K.; Bazaga-García, Montse; Olivera-Pastor, Pascual; Villemin, Didier; Losilla, Enrique R.; Martos, Estefanía Q.; Hix, Gary B.; G. Aranda, Miguel Ángel; Demadis, Konstantinos D.; Cabeza-Diaz, Aurelio[et al.] (American Chemical Society, 2013-07-24)
Two new families of divalent metal hybrid derivatives from the aromatic tetraphosphonic acids 1,4- and 1,3-bis(aminomethyl)benzene-N,N′-bis(methylenephosphonic acid), (H2O3PCH2)2−N−CH2C6H4CH2−N(CH2PO3H2)2 (designated herein ... -
Structure of stratlingite and effect of hydration methodology on microstructure
Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles; Álvarez-Pinazo, Gema; Cabeza-Diaz, Aurelio; Cuesta-Garcia, Ana Maria; Sanz, Jesus; García-Aranda, Miguel Ángel[et al.] (ICE publishing, 2015)
Stratlingite, Ca4Al2(OH)12[AlSi(OH)8]2•2H2O, is an AFm phase which appears as hydration product of aluminum-rich cements. These binders may be calcium aluminate cements, calcium sulfoaluminate cements and also Belite Calcium ... -
Structure, Atomistic Simulations, and Phase Transition of Stoichiometric Yeelimite
Cuesta-Garcia, Ana Maria; Gomez-de-la-Torre, Maria de los Angeles; Losilla, Enrique R.; Peterson, Vanessa K.; Rejmak, Pawel; Ayuela, Andres; Frontera, Carlos; García-Aranda, Miguel Ángel[et al.] (ACS publications, 2013)
ABSTRACT: Yeelimite, Ca4[Al6O12]SO4, is outstanding as an aluminate sodalite, being the framework of these type of materials flexible and dependent on ion sizes and anion ordering/disordering. On the other hand, yeelimite ... -
Synchrotron Pair Distribution Function analyses of Ye’elimite-based pastes
Cuesta-Garcia, Ana Maria; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles; Zea-Garcia, Jesus D. (2018-10-15)
The study of nanocrystalline phase atomic ordering is intrinsically complicated. The presence of additional crystalline phase(s) exacerbates this challenge. Here, we use the synchrotron pair distribution function (PDF) to ... -
Synchrotron Radiation Pair Distribution Function Analysis of Gels in Cements
Cuesta-Garcia, Ana Maria; Zea-Garcia, Jesus D.; Londono-Zuluaga, Diana; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria Isabel; Vallcorba, Oriol; García-Aranda, Miguel Ángel[et al.] (MDPI, 2017)
The analysis of atomic ordering in a nanocrystalline phase with small particle sizes, below 5 nm, is intrinsically complicated because of the lack of long-range order. Furthermore, the presence of additional crystalline ... -
Synthesis and Electrochemical properties of metal(II)- carboxyethylphenylphosphinates
Bazaga-García, Montse; Vílchez-Cózar, Álvaro; Maranescu, Bianca; Olivera-Pastor, Pascual; Marganovici, Marko; Ilia, Gheorghe; Cabeza-Diaz, Aurelio; Visa, Aurelia; Perez-Colodrero, Rosario Mercedes[et al.] (Royal Society of Chemistry, 2021)
We report herein the synthesis, structural characterization and electrocatalytic properties of three new coordination polymers, resulting from the combination of divalent metal (Ca2+, Cd2+ or Co2+) salts with (2-carboxy ... -
Synthesis and Frictional Characteristics of Bio-Based Lubricants Obtained from Fatty Acids of Castor Oil
Paulo Roberto, Campos Flexa Ribeiro Filho; Rocha do Nascimento, Matheus; Otaviano da Silva, Silvia Shelly; Murilo Tavares de Luna, Francisco; Rodriguez-Castellon, Enrique; Loureiro Cavalcante, Célio[et al.] (IOAP-MDPI, 2023-01-31)
The depletion of oil reserves and concerns about the environmental impact of the use and incorrect disposal of mineral lubricants have been promoting the development of bio-based lubricants. In this study, biolubricants ... -
Synthesis and structural characterization of 2-D layered copper(II) styrylphosphonate coordination polymers
Maranescu, Bianca; Visa, Aurelia; Ilia, Gheorghe; Simon, Zeno; Demadis, Konstantinos D.; Perez-Colodrero, Rosario Mercedes; Cabeza-Diaz, Aurelio; Vallcorba, Oriol; Rius, Jordi; Choquesillo-Lazarte, Duane[et al.] (Taylor & Francis, 2014-04-11)
We report the synthesis, physicochemical characterization, and crystal structure of Cu-SP (SP = styrylphosphonic acid, H2O3PCH=CH2(C6H5)), the first reported example of a metal derivative of SP. The starting SP acid was ... -
Synthesis and structural characterization of homochiral 2D coordination polymers of zinc and copper with conformationally flexible ditopic imidazolium-based dicarboxylate ligands
Nicasio, Antonio I.; Montilla, Francisco; Álvarez, Eleuterio; Perez-Colodrero, Rosario Mercedes; Galindo, Agustín (The Royal Society of Chemistry, 2016-11-30)
Different novel coordination polymers containing zinc, 1–4, and copper, 5–8, metals, connected via chiral imidazolium-based dicarboxylate ligands, [LR]−, were isolated by reaction between zinc acetate or copper acetate ...