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Journal articles on the topic 'Sols – Composition'

Author: Grafiati

Published: 27 July 2024

Last updated: 31 July 2025

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1

Carcaillet, Christopher, and Brigitte Talon. "Aspects taphonomiques de la stratigraphie et de la datation de charbons de bois dans les sols : exemple de quelques sols des Alpes." Géographie physique et Quaternaire 50, no. 2 (2007): 233–44. http://dx.doi.org/10.7202/033091ar.

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RÉSUMÉ Les phénomènes d'enfouissement et de fragmentation des charbons de bois des sols de montagne sont mis en évidence par l'analyse anthracologique et par des datations absolues au14C de quatre profils pédologiques provenant des Alpes françaises. Ces dernières s'avèrent indispensables mais insuffisantes pour comprendre le mode de stratification. Les datations doivent être précédées d'une analyse des assemblages anthracologiques à la fois qualitative (composition taxonomique) et quantitative lorsque les sols sont suffisamment riche en charbons. Le processus de stratification dans les sols n'

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2

Dumoulin, Matthieu, Wael Hamd, Elsa Thune, Cyrille Rochas, and René Guinebretiere. "In situ time-resolved small-angle X-ray scattering observation of the fractal aggregation process in tin alkoxide polymeric solution." Journal of Applied Crystallography 49, no. 2 (2016): 366–74. http://dx.doi.org/10.1107/s1600576716000297.

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SnO2 transparent gels have been synthesized from alkoxide precursor in toluene-2-propanol solvents. The chemical reactivity of transition metal alkoxides must be controlled in order to obtain sols and gels. In tin alkoxide based systems, this control can be achieved through complexation by a chelating agent such as acetylacetone. The gelation of the sols has been studied by in situ small-angle X-ray scattering (SAXS) measurements at the European Synchrotron Radiation Facility in Grenoble on the BM02 beamline. After the addition of water, primary particles are created and stick progressively to

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3

Lysak, Nataliia, Olga Skorodumova, Anton Chernukha, and Viacheslav Kurepin. "Effect of H<sub>3</sub>PO<sub>4</sub> and Phenol Additives on Gel Formation in Silica Fire Retardant Coatings for Building Materials." Defect and Diffusion Forum 437 (October 7, 2024): 103–13. http://dx.doi.org/10.4028/p-uvjat0.

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Increasing the fire resistance of wooden building structures is quite effectively ensured thanks to the development of fire-fighting compositions with aromatic components that contribute to the formation of a carbonized layer on the surface of the material during combustion. It is also known about the mutual positive influence of benzene fragments and phosphate-containing compounds on the fire-resistant characteristics of wood. The paper considers the possibility of complex use of phenol and orthophosphate acid to improve the flame retardant properties of SiO2-based coatings. The effect of mod

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Смагин, В. П., А. П. Худяков та А. А. Бирюков. "Люминесценция ионов Eu-=SUP=-3+-=/SUP=- в матрице фторированной алюмоиттриевой композиции". Физика твердого тела 62, № 2 (2020): 274. http://dx.doi.org/10.21883/ftt.2020.02.48879.566.

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The optical spectra of fluorinated yttrium aluminum compositions activated by Eu3+ ions were studied. The compositions were synthesized by thermal decomposition at 800 °C of fluorine-containing complexes of yttrium, europium, and aluminum nitrate, isolated as sols from ethyl acetate (EA). The main phases of the compositions are (Y1-xEux)OF and (Y1-xEux)AlO3. Photoluminescence is associated with 5D1,2 → 7F0,1,2 and 5D0 → 7F0,1,2,3,4 electronic transitions of 4f - electrons of Eu3+ ions, replacing yttrium ions in its oxide and oxyfluoride. The dependences of luminescence on the composition and s

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5

Ko Zaw, Aung, O. Yarovaya, Nyan Htet Lin, and M. Donina. "Synthesis and colloidal-chemical properties of manganese dioxide hydrosols synthesized in the presence of sodium thiosulfate." E3S Web of Conferences 376 (2023): 01080. http://dx.doi.org/10.1051/e3sconf/202337601080.

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In this paper, the possibility of obtaining manganese dioxide hydrosols by condensation in the presence of sodium thiosulfate is considered. The main properties of hydrosols, including particle size and shape, phase composition, electrophoretic mobility, and the pH range of the dispersion medium in which sols are aggregatively stable, are determined. The sol coagulation thresholds in the presence of potassium chloride, sodium sulfate, and potassium sulfate were determined. It was found that the hydrosols coagulation is reversible. The nature of the aggregative stability of obtained manganese d

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6

Calzada, M. L., M. Algueró, A. Santos, M. Stewart, M. G. Cain, and L. Pardo. "Piezoelectric, ferroelectric Pb(Mg1/3Nb2/3)O3–PbTiO3 thin films with compositions around the morphotropic phase boundary prepared by a sol-gel process of reduced thermal budget." Journal of Materials Research 24, no. 2 (2009): 526–33. http://dx.doi.org/10.1557/jmr.2009.0045.

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Single perovskite polycrystalline Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN-PT) thin films with PMN to PT ratios around the morphotropic phase boundary composition (070PMN-0.30PT, 0.65PMN-0.35PT, and 0.60PMN-0.40PT) have been prepared by chemical solution deposition (CSD). Air-stable and precipitate-free PMN and PT precursor sols were separately synthesized, and PMN-PT sols were obtained by the simple mixture in air of the former. The PMN-PT sols were deposited onto Pt-coated Si substrates and dried on a hot-plate. Crystallization of the films was carried out by rapid thermal processing (RTP) in oxygen, us

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7

Skorodumova, Olga, Olena Tarakhno, and Olena Chebotaryova. "Improving the Fire-Retardant Properties of Cotton-Containing Textile Materials Through the Use of Organo-Inorganic SiO<sub>2</sub> Sols." Key Engineering Materials 927 (July 29, 2022): 63–68. http://dx.doi.org/10.4028/p-jbv49r.

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The effect of fire-retardant compositions based on organo-inorganic SiO2 sols without the use of flame retardants on increasing the fire resistance of cotton-containing textile materials has been studied. Previous studies have shown that the combined use of silicate coatings and flame retardants of simple structure prevents the ignition of impregnated samples of cotton-containing fabric and the proposed chemistry of this process. These studies did not use flame retardants to obtain more information on the effect of the composition and concentration of experimental organo-inorganic SiO2 sols on

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8

Scheurell, Kerstin, and Erhard Kemnitz. "Fluorolytic Sol–Gel Synthesis of Nanometal Fluorides: Accessing New Materials for Optical Applications." Inorganics 6, no. 4 (2018): 128. http://dx.doi.org/10.3390/inorganics6040128.

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The potential of fluorolytic sol–gel synthesis for a wide variety of applications in the field of optical materials is reviewed. Based on the fluorolytic sol–gel synthesis of nanometal fluorides, sols of complex fluorometalates have become available that exhibit superior optical properties over known classical binary metal fluorides as, for instance, magnesium fluoride, calcium fluoride, or strontium fluoride, respectively. The synthesis of transparent sols of magnesium fluoroaluminates of the general composition MgxAlFy, and fluoroperovskites, [K1−xNax]MgF3, is reported. Antireflective coatin

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9

Steudel, Ralf, Thomas Göbel, and Gabriele Holdt. "The Molecular Composition of Hydrophilic Sulfur Sols Prepared by Acid Decomposition of Thiosulfate [1]." Zeitschrift für Naturforschung B 43, no. 2 (1988): 203–18. http://dx.doi.org/10.1515/znb-1988-0212.

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Hydrophilic sulfur sols prepared from sodium thiosulfate and concentrated sulfuric acid and purified by repeated NaCl precipitation and peptization in water have been studied by chemical analysis, vibrational spectroscopy, ion-pair chromatography and reversed-phase HPLC. The composition of the sol is Na1.64S28.6O6 · 5.9/n Sn · 1.0 NaCl. The elemental sulfur Sn (n = 6-14; mainly S 8) accounts for 17% the total sulfur; 83% of the S are present as long-chain polythionates which form micelles in which the Sn molecules are dissolved. On aging of the sol at 20 °C the polythionate micelles decompose

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10

Qu, Dan Ni, Hai Feng Cheng, Yong Jiang Zhou, Xin Xing, and Dong Qing Liu. "Effect of Templates on the Electrochromic Properties of Tungsten Oxide Thin Films." Applied Mechanics and Materials 152-154 (January 2012): 519–25. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.519.

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The mesoporous tungsten oxide (WO3) films were derived from the peroxotungstic acid (PTA) sol with templates through sol-gel method. Polyethylene glycol (PEG) 400 and tri-block polymer P123 (HO(CH2CH2O)20(CH2CH(CH3)O)70(CH2CH2O)20H) were chosen as templates. The structural, morphological, optical and electrochromic properties of the WO3 thin films derived from different sols were studied. The composition and crystal phase of the films change at different annealing temperatures. The films derived from the sols containing templates have higher crystallization temperature than those without templ

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11

HARTRIDGE, A., and A. K. BHATTACHARYA. "PREPARATION AND HOMOGENEITY OF LANTHANIDE-DOPED CERIA NANOCRYSTAL DISPERSIONS." Modern Physics Letters B 14, no. 03 (2000): 79–88. http://dx.doi.org/10.1142/s0217984900000136.

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Aqueous sols of solid solutions of the general formula Ce 1-x Ln x O 2-x/2□x/2 (Ln=entire lanthanide range, x = 0–0.50 and =anion vacancy) were synthesized using inorganic materials. The sols contained single-phase nanocrystals with particle sizes between 7–20 nm from photon correlation spectroscopy and crystallite sizes around 5 nm from X-ray diffraction. The nanocrystals were dispersed on an amorphous silica support and individual crystals examined for composition and structure by high-resolution TEM/EDAX. High-resolution pictures showed the nanocrystals to be between 4–6 nm in size, in agre

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12

Golobostanfard, Mohammad Reza, Reza Ebrahimifard, and Hossein Abdizadeh. "Synthesis of TiO₂/Zno Core/Shell Type Nanocomposite via Sol-Gel Method." Key Engineering Materials 471-472 (February 2011): 993–98. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.993.

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TiO2/ZnO Nanocomposite powders with different Zn/Ti ratios were synthesized via sol-gel method. The as prepared and calcined Titania nanopowders were added to the ZnO sols. Also the as prepared and calcined ZnO nanopowders were separately added to the TiO2 sols. However, in the latter case, the nanocomposite never formed due to the high acidity of the sols. After gelation, the powders were dried and calcined at 500°C for 1h. The phase composition, structure, morphology and optoelectrical properties of the powders were characterized by means of X-ray diffraction (XRD), field emission scanning e

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13

Gribanyov, D. A., E. V. Rudakova, and E. G. Zavyalova. "A systematic study of SERS spectra of cationic Raman dyes adsorbed on citrate-stabilized silver nanoparticles." Известия Российской академии наук. Серия физическая 87, no. 2 (2023): 194–200. http://dx.doi.org/10.31857/s0367676522700363.

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The adsorption (kinetics and signal stability) of cationic triarylmethane dyes and an acridine derivative with various counter-ions on citrate-stabilized hydroxylamine-reduced silver sols was studied using SERS spectroscopy. The influence of the method of nanoparticle synthesis, as well as the composition and ionic strength of the medium on the stability of nanoparticle–dye complexes was investigated.

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14

Moberg, Jens Peter. "Composition and development of the clay fraction in danish soils. An overview / Composition et évolution de la fraction argileuse des sols danois. Un aperçu." Sciences Géologiques. Bulletin 43, no. 2 (1990): 193–202. http://dx.doi.org/10.3406/sgeol.1990.1854.

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15

Shilova, O. A., N. N. Gubanova, A. G. Ivanova, M. Yu Arsent’ev, and V. A. Ukleev. "Composition and structure of platinum-containing thin composite films prepared from silica sols." Russian Journal of Inorganic Chemistry 62, no. 5 (2017): 645–53. http://dx.doi.org/10.1134/s0036023617050230.

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16

Lysak, Nataliia, Olga Skorodumova, Anton Chernukha, Viktoria Kochubei, and Konstantinos Sotiriadis. "Study of Gelation Processes in Flame Retardant Compositions of the SiO<sub>2</sub> Sol System – A Phosphate-Containing Additive." Defect and Diffusion Forum 438 (February 10, 2025): 101–10. https://doi.org/10.4028/p-i2syir.

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One of the promising directions for ensuring the fire resistance of wooden building materials is the development of silicon phosphate compositions, thanks to which the formation of a protective layer is possible, which effectively prevents the spread of fire. The paper examines the possibility of using orthophosphate acid as a modifying additive for silicic acid sols. The influence of H3PO4 concentration on the rheological characteristics of the studied sols was determined. Sols with small amounts of orthophosphate acid (1–2%) lost their fluidity in the interval of 45–70 minutes. Increase of t

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17

Anh Tuyet, Ngo Thi. "CHARACTERIZATION OF FLUORIDATED HYDROXYAPATITE (FHA) SOL-GEL COATINGS ON TITANIUM SUBSTRATE." Vietnam Journal of Science and Technology 55, no. 5B (2018): 40. http://dx.doi.org/10.15625/2525-2518/55/5b/12208.

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In this paper, FHA coatings [FHA, Ca10(PO4)6(OH)2-x Fx] (wherein 0 ≤ x ≤ 2) were deposited on titanium substrate by sol-gel method with heat treatment at 900 oC for 4 hours. Different concentrations of F- were incorporated into the apatite structure during the sols preparation. The FHA sols were prepared using various amounts of ammonium fluoride [NH4F] with the [P]/[F] molar ratios of 12, 6, 4, 3 in order to have the corresponding compositions of Ca10(PO4)6(F0.5 OH1.5), Ca10(PO4)6 FOH, Ca10(PO4)6(F1.5 OH0.5) and Ca10(PO4)6F2, respectively. The fabricated FHA coatings were assessed by various

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18

Aust, Undine, and Gerhard Tomandl. "Development of Non-Silicate Microporous Membranes with High Chemical Resistance." Advances in Science and Technology 45 (October 2006): 2043–48. http://dx.doi.org/10.4028/www.scientific.net/ast.45.2043.

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TiO2-ZrO2 mixed-oxide membranes were prepared via polymeric sol-gel technique. The final composition is already predefined during the preparation of the sols by using the corresponding quantities of the starting alkoxides. The mixed-oxide membranes were characterized by Xray diffraction, nitrogen sorption, and field emission scanning electron microscopy as well as filtration and corrosion tests. The observed results prove the positive influence on the investigated properties by addition of a second oxide. Depending on the composition of the mixed-oxide membranes, a remarkable increase in the c

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19

Evstrop'ev, S. K., V. M. Volynkin, A. S. Saratovskiy, et al. "Modification of Quartz Ceramics by Applying a Sol-Gel Composition of MgO–Al2O3–ZrO2–SiO2 System." Журнал прикладной химии, no. 2 (December 15, 2023): 200–208. http://dx.doi.org/10.31857/s0044461823020081.

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Composite sol-gel materials of the MgO–Al2O3–ZrO2–SiO2 system were synthesized and the processes of their thermal evolution and crystallization were studied. Application of sol-gel compositions of the MgO–Al2O3–ZrO2–SiO2 system to the surface of quartz ceramics leads to a significant increase in the mechanical strength of the material. The processes of thermal evolution of the sol-gel composition were studied using IR spectroscopy, X-ray diffraction, electron microscopy, and energy dispersive analysis. It was shown that the formation of the oxide composite structure of materials begins at the

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Salissou Ibrahim, Jamilou, Ibrahim Doka Dahiratou, Baradje Moussa, et al. "EFFET DES FUMURES ORGANIQUES ET DES PRATIQUES AGRICOLES SUR LES PROPRIETES PHYSICO-CHIMIQUES DES SOLS EN CULTURE PURE ET ASSOCIEE DE TOMATE DANS LARRONDISSEMENT V DE NIAMEY (NIGER)." International Journal of Advanced Research 11, no. 04 (2023): 963–75. http://dx.doi.org/10.21474/ijar01/16748.

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La pauvretes des sols en nutriments au Niger figure parmi les contraintes majeures a la culture maraichere.Dans ce contexte, la gestion efficace des ressources en eau et la fertilisation des sols saverent necessaires pour maintenir, rebondir les rendements des cultures et ameliorer la fertilite des sols.Lobjectifvise a ameliorerla production de la tomate, element nutritionnel de base dans lalimentation nigerienne et a une bonne gestion durable de la fertilite des sols et didentifier le modele ideal damelioration des conditions de culture de cette plante.Un dispositif experimental de Ficher a e

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Yang, Hui, Lu Lu Zhang та Chuang Wang. "Preparation and Biocompatibility of Nano-Hydroxyapatite/β-Sheet Silk Protein Composite". Advanced Materials Research 287-290 (липень 2011): 1335–43. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1335.

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To enhance the mechanical strength of hydroxyapatite (HAP), a nano-HAP/β-sheet fibroin (nano-HAP/SF) composite was synthesized by mixing nano-HAP sols with SF sols. Aβ-sheet structural SF was prepared by a salt-resolving method. The nano-HAP sols was prepared by a co-precipitation method. The phase composition of HAP and nano-HAP/SF composites were investigated by X-ray diffraction and Fourier transform infrared spectroscopy (FTIR). Their morphologies were observed by scanning electron microscopy. The mechanical strength of the nano-HAP/SF composite was measured by a universal material detecto

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22

Xu, Xue Qing, Yu Zhang, and G. Xu. "Influences of Stabilizers on the Microstructure and Properties of Sol-Gel Tin Doped Indium Oxide Thin Films." Materials Science Forum 610-613 (January 2009): 372–77. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.372.

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The tin doped indium oxide (ITO) thin films were prepared by sol-gel dip-coating process from InCl2.4H2O and SnCl4 in alcoholic solutions. The influences of organic ligands, including acetylacetone (AcAc) and diethanolamine (DEA), on the stability and the composition of the sols, and on the microstructure and properties of the thin films have been investigated. It is indicated that a suitable amount of DEA or AcAc helped to keep the stability of the ITO sols, and helpful for the formation of the homogeneous thin films. The TG-DSC and X-ray diffraction analysis revealed that the organic ligands

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23

Mitrovic, Dejan, Vladimir Panic, Aleksandar Dekanski, Slobodan Milonjic, Radoslav Atanasoski, and Branislav Nikolic. "The effect of the composition of the dispersing medium of oxide sols on the electrocatalytic activity of sol-gel obtained RuO2-TiO2/Ti anodes." Journal of the Serbian Chemical Society 66, no. 11-12 (2001): 847–57. http://dx.doi.org/10.2298/jsc0112847m.

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The influence of the addition of methanol, ethanol, 1-propanol and 2-propanol to the dispersing medium of amixture of RuO2 and TiO2 sols on the electrochemically active surface area for proton exchange, as well as on the electrocatalytic activity for the chlorine evolution reaction (CER) of RuO2-TiO2/Ti electrode obtained by sol-gel procedure was investigated. The electrochemically active surface area was examined by cyclic voltammetry, while the analysis of the activity for the CER was performed by polarization measurements. The stability of the obtained anode coatings was also checked by an

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Kumar, Amitabh, and Rustum Roy. "RESA—A wholly new process for fine oxide powder preparation." Journal of Materials Research 3, no. 6 (1988): 1373–77. http://dx.doi.org/10.1557/jmr.1988.1373.

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A new process for making fine (10–1000 nm) oxide powders has been devised. It is based on striking an are between two metallic electrodes submerged in a dielectric liquid, typically water. By controlling the process parameters (voltage, amperage, and composition of liquid), one can obtain fine sols of the anhydrous oxides of Al, Ti, Zr, etc., and exercise some control over the particular phase in variable valence metals such as Cr.

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Čierniková, Marianna, Petra Balážová, Alfonz Plško, Petr Exnar, Jana Pagáčová, and Iveta Papučová. "Relation between chemical composition of sols and surface free energy of inorganic-organic films." Journal of Sol-Gel Science and Technology 88, no. 3 (2018): 497–507. http://dx.doi.org/10.1007/s10971-018-4856-y.

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ZHAO, CHANGLEI, ZHIHONG WANG, WEIGUANG ZHU, XI YAO, and WEIGUO LIU. "PZT THICK FILMS FABRICATION USING A SOL-GEL BASED 0-3 COMPOSITE PROCESSING." International Journal of Modern Physics B 16, no. 01n02 (2002): 242–48. http://dx.doi.org/10.1142/s0217979202009706.

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A sol-gel based 0-3 ceramic-ceramic composite processing has been applied to fabricate lead zirconate titanate thick films with a composition near the morphotropic phase boundary, PZT53/47. In order to eliminate the effects of humidity on the stability of the sols, solid PZT precursors are prepared from partially stabilized titanium isopropoxide, lead acetate trihydrate and zirconium acetylacetonate without any solvent. Then the solid precursors were dissolved in 2-methoxythanol to form sols. Certain quantum modified PZT ceramic powder was dispersed into this obtained solution. Crack-free thic

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Aurousseau, P., and J. Pages. "Estimation de la composition chimique d'un phyllosilicate secondaire en equilibre avec une population homogene d'eaux." Clay Minerals 20, no. 3 (1985): 315–26. http://dx.doi.org/10.1180/claymin.1985.020.3.04.

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ResumeDeux questions sont abordées: (1) Une eau naturelle étant donnée, peut-on considérer qu'elle est en équilibre avec un minéral de formule connue? (2) Un ensemble homogène d'eaux naturelles étant donné, peut-on considérer que ces eaux sont en équilibre avec un minéral? Si oui, Peut-on proposer une estimation de la composition de ce mineral? Nous proposons une méthode pour répondre à chacune de ces deux questions. Cette methode est appliquée à l'estimation de minéraux argileux de formule générale SiaAlbMgcCadKeNafOn(OH)m. Les données utilisées sont des eaux de percolation, dans des colonnes

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Urkhanova, L. A., and M. A. Savelyeva. "The effect of different composition sols on change of structure and properties of cement stone." Nanotechnologies in Construction: A Scientific Internet-Journal 8, no. 6 (2016): 20–42. http://dx.doi.org/10.15828/2075-8545-2016-8-6-20-42.

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Shilova, O. A., N. N. Gubanova, V. A. Matveev, V. Yu Bayramukov, and A. P. Kobzev. "Composition, structure, and morphology of the surface of nanodimensional platinum-containing films obtained from sols." Glass Physics and Chemistry 42, no. 1 (2016): 78–86. http://dx.doi.org/10.1134/s1087659616010168.

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Pawlik, Natalia, Barbara Szpikowska-Sroka, Tomasz Goryczka, and Wojciech A. Pisarski. "Studies of Sol-Gel Evolution and Distribution of Eu3+ Ions in Glass–Ceramics Containing LaF3 Nanocrystals Depending on Initial Sols Composition." International Journal of Molecular Sciences 22, no. 3 (2021): 996. http://dx.doi.org/10.3390/ijms22030996.

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In this work, we performed a systematic analysis of the impact of selected chemical reagents used in sol-gel synthesis (i.e., N,N-dimethylformamide) and different catalyst agents (i.e., CH3COOH, HNO3) on the formation and luminescence of Eu3+-doped SiO2–LaF3 nano-glass–ceramics. Due to the characteristic nature of intra-configurational electronic transitions of Eu3+ ions within the 4f6 manifold (5D0 → 7FJ, J = 0–4), they are frequently used as a spectral probe. Thus, the changes in the photoluminescence profile of Eu3+ ions could identify the general tendency of rare earth materials to segrega

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Dymnikova, N. S., E. V. Erokhina, and A. P. Moryganov. "New approach to use of domestic flaxseed raw materials." Chemical Engineering 23, no. 6 (2022): 250–61. http://dx.doi.org/10.31044/1684-5811-2022-23-6-250-260.

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The conditions for obtaining stable metallic silver hydrosols in the presence of flax fiber extracts have been studied by the method of «green chemistry» and the possibility of using synthesized sols to provide cellulose-containing materials with antimicrobial activity or biosecurity has been proved. The process of synthesis of ultrafine silver particles in the presence of concomitant natural impurities of flax fibers isolated from them during alkaline high-temperature treatment was studied by spectrophotometry, photon correlation spectroscopy and visual observation. The effect of the extract

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Baklanova, Natalia I., B. N. Zaitsev, and Anatoly Titov. "Improved Oxide-Based Interfacial Coatings for the Next Generation of CMC's." Advances in Science and Technology 50 (October 2006): 51–56. http://dx.doi.org/10.4028/www.scientific.net/ast.50.51.

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CMC's reinforced by SiC-based fibers achieve high toughness and damage tolerance through the disposal of weak fiber coating which can deflect cracks and promote debonding at the fiber/matrix region. Refractory oxide-based systems are considered as the most promising ones for this purpose. Sols of zirconia, including stabilized zirconia were used as simple and readily processable precursors for obtaining interfacial coatings on SiC tow and cloth. The morphology, composition, topography, roughness, tensile properties of as-prepared and exposed to air at 1000°C coated fibers were evaluated by SEM

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Minter, J. R. "Characterization of colloidal materials by cryo-TEM." Proceedings, annual meeting, Electron Microscopy Society of America 51 (August 1, 1993): 728–29. http://dx.doi.org/10.1017/s0424820100149477.

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Many researchers develop products and processes that depend upon colloidal materials. Rheological and other important material parameters are influenced by the morphology of the colloid. The photography industry uses many such colloids including silver halide sols, photographic coupler sols and emulsions surfactants, and gelatin solutions and gels. High-resolution direct electron images of these systems in their native states permit photographic scientists to understand how changes in formulation produce changes in microstructure and, ultimately, to understand the photographic performance of t

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Kaya, C., and A. R. Boccaccini. "Microstructural variations in mullite ceramics derived from diphasic sols using different forming techniques." Journal of Materials Research 17, no. 12 (2002): 3000–3003. http://dx.doi.org/10.1557/jmr.2002.0435.

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Mullite ceramics with controlled microstructure in terms of residual glassy phase and density were produced from diphasic silica/boehmite sols using pressure filtration, die-pressing, and extrusion techniques. The effect of the compaction process on the green and sintered densities and on the final mullite microstructure was investigated. It is shown that glassy-phase-free mullite with high green and sintered densities can be produced from engineered diphasic colloidal suspensions using pressure filtration. The results show that the green body formation technique strongly determines the final

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Panic, Vladimir, and Branislav Nikolic. "Electrocatalytic properties and stability of titanium anodes activated by the inorganic sol-gel procedure." Journal of the Serbian Chemical Society 73, no. 11 (2008): 1083–112. http://dx.doi.org/10.2298/jsc0811083p.

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The properties of activated titanium anodes, RuO2-TiO2/Ti and RuO2--TiO2-IrO2/Ti, prepared from oxide sols by the sol-gel procedure, are reviewed. RuO2 and TiO2 sols were synthesized by forced hydrolysis of the corresponding chlorides in acid medium. The morphology of the prepared sols was investigated by transmission electron microscopy. The chemical composition of the RuO2 sol was determined by X-ray diffraction and thermogravimetric analysis. The loss of electrocatalytic activity of a RuO2-TiO2/Ti anode during an accelerated stability test was investigated by examination of the changes in t

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36

Hamulić, Damir, Peter Rodič, Matic Poberžnik, Marjan Jereb, Janez Kovač, and Ingrid Milošev. "The Effect of the Methyl and Ethyl Group of the Acrylate Precursor in Hybrid Silane Coatings Used for Corrosion Protection of Aluminium Alloy 7075-T6." Coatings 10, no. 2 (2020): 172. http://dx.doi.org/10.3390/coatings10020172.

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This study investigated polysiloxane hybrid sol-gel coatings synthesized from tetraethyl orthosilicate (TEOS), 3-(trimethoxysilyl)propyl methacrylate (MAPTMS) and two different precursors, i.e., methyl- or ethyl- methacrylate (MMA or EMA), as corrosion protection of aluminium alloy 7075-T6. The hypothesis was that the additional alkyl group might affect the chemical properties and, consequently, the corrosion properties. Synthesis of the sols proceeded in two steps, each involving either MMA or EMA in the same molar ratio. The resulting sols, siloxane-(poly(methyl methacrylate-co-MAPTMS)) or s

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Boccaccini, A. R., I. MacLaren, M. H. Lewis, and C. B. Ponton. "Electrophoretic deposition infiltration of 2-D woven SiC fibre mats with mixed sols of mullite composition." Journal of the European Ceramic Society 17, no. 13 (1997): 1545–50. http://dx.doi.org/10.1016/s0955-2219(97)00025-3.

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Volkova, A. V., D. A. Savelev, N. S. Chuikov, V. A. Vodolazhskii, and L. E. Ermakova. "Effect of Conditions for Obtaining Detonation Nanodiamond on Surface Composition and Stability of Its Aqueous Sols." Colloid Journal 87, no. 1 (2025): 1–14. https://doi.org/10.1134/s1061933x2460129x.

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Duponnois, Robin, Ezékiel Baudoin, Hervé Sanguin, et al. "L'introduction d'acacias australiens pour réhabiliter des écosystèmes dégradés est-elle dépourvue de risques environnementaux ?" BOIS & FORETS DES TROPIQUES 318, no. 318 (2013): 59. http://dx.doi.org/10.19182/bft2013.318.a20519.

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L'utilisation d'essences forestières exotiques et plus particulièrement des arbres à croissance rapide (acacias, pins ou eucalyptus) a été fréquemment recommandée pour réhabiliter et restaurer à brève échéance des milieux dégradés suite à des événements naturels ou à des activités anthropiques. L'incidence sur l'environnement de l'introduction de ces espèces, parfois envahissantes, est surtout évaluée pour leur impact sur la biodiversité végétale et les caractéristiques physico-chimiques des sols, mais rarement en ce qui concerne la composition de la microflore. Les micro-organismes, et plus p

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Pookmanee, Pusit, and Sukon Phanichphant. "Characterization of Bismuth Titanate Powders." Advanced Materials Research 26-28 (October 2007): 247–50. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.247.

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Bismuth titanate was prepared from the sol-gel method. Bismuth nitrate and titanium isopropoxide were used as the starting precursors with the mole ratio of Bi:Ti as 4:3. Solutions were mixed in acetic acid medium and heat at 80 oC for 2h. Sols were obtained after adjusting the final of pH of solution to 2. Gels were formed after drying at 100 oC for 24h. The milled powders were calcined at 500-800 oC for 2h. The phase formation was investigated by X-ray diffractometry (XRD). Single phase with orthorhombic structure of bismuth titanate was obtained after calcination at 700 oC for 2h. The morph

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Onguene, N.A. "Selective logging and shifting cultivation practices significantly reduce ectomycorrhizal inoculum potential of humid forest soils of South Cameroon." Revue Scientifique et Technique Foret et Environnement du Bassin du Congo 16 (April 18, 2021): 22–35. https://doi.org/10.5281/zenodo.4699508.

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<strong>Abstract</strong> Ectomycorrhizal (ECM) associations are key biological engineers of soil biodiversity in temperate, boreal and tropical humid forests. They play key roles in ecological functioning, fungal diversity, worldwide economy, food provisions and carbon sequestration. Yet, they are threatened by rampant man-made disturbances. Hitherto, little information and few data are available on effects of selective logging and shifting cultivation practices in tropical forests on ECM inoculum potential (ECMIP). ECMIP was investigated in rainforest patches of South Cameroon and assessed i

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Shilova, Olga A. "Heterogeneous Sol-Gel Systems – Derived Ceramics." Advances in Science and Technology 63 (October 2010): 131–40. http://dx.doi.org/10.4028/www.scientific.net/ast.63.131.

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Heterogeneous sol-gel systems (suspensions), synthesized by mixing sols and fillers of various dispersity (oxides, minerals, etc.), are successfully used to prepare glass-ceramic coatings. Sol composition (precursor, catalyst, solvent, dopants), filler dispersity and a homogenization mode for obtained suspensions essentially influence the properties of coatings formed. Here ways of the control of properties of heterogeneous sol-gel systems (by using various dopants, additives of organic low- and high-molecular compounds, as well as ultrasound) to reach set electro-physical and mechanical chara

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Manso, M., J. M. Martínez-Duart, M. Langlet, C. Jiménez, P. Herrero, and E. Millon. "Aerosol-gel-derived Microcrystalline Hydroxyapatite Coatings." Journal of Materials Research 17, no. 6 (2002): 1482–89. http://dx.doi.org/10.1557/jmr.2002.0220.

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Highly porous microcrystalline hydroxyapatite (HAP) coatings have been prepared from calcium nitrate and phosphoric acid based sols by the aerosol-gel process. The coatings were studied after sintering at different temperatures with the use of Fourier transform infrared spectroscopy, x-ray diffraction, energy disperse x-ray microanalysis, scanning electron microscopy, and transmission electron microscopy. The composition, structure, and morphology of the coatings sintered at 650 °C fit fairly well highly porous HAP. These coatings were reproduced onto TiO2/Si substrates and studied by Rutherfo

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Ruess, Liliane, Anders Michelsen, and Sven Jonasson. "Simulated climate change in subarctic soils: responses in nematode species composition and dominance structure." Nematology 1, no. 5 (1999): 513–26. http://dx.doi.org/10.1163/156854199508513.

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Abstract The nematode fauna at two contrasting subarctic sites was studied at Abisko, Swedish Lapland. One site was a dwarf shrub dominated, tree-line heath (450 m a.s.l.) and the other a high altitude fellfield (1150 m a.s.l.). Responses in the composition of the nematode fauna to eight growing seasons with simulated climate change were monitored. The environmental manipulations consisted of temperature increase by using passive greenhouses, NPK fertilization, and a combination of both. A total of 98 species was found at the sites, with twice as many species at the heath compared to the clima

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Bondar’, E. A., O. A. Shilova, I. A. Lebedev, et al. "Composition and Morphology of Transparent Thin Films Prepared from Water–Ethanol Sols Based on Tin(IV) Compounds." Russian Journal of Inorganic Chemistry 70, no. 2 (2025): 121–29. https://doi.org/10.1134/s0036023624602769.

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Gilliot, Jean-Marc, Emmanuelle Vaudour, Joël Michelin, and Sabine Houot. "Estimation des teneurs en carbone organique des sols agricoles par télédétection par drone." Revue Française de Photogrammétrie et de Télédétection, no. 213 (April 26, 2017): 105–15. http://dx.doi.org/10.52638/rfpt.2017.193.

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La matière organique (MO) est un élément important de la fertilité des sols cultivés. Les mesures de réflectance ont déjàété utilisées avec succès pour prédire la teneur en carbone organique (CO) des sols agricoles, soit au laboratoire surdes échantillons de sols séchés, soit directement au champ à l'aide de spectro-radiomètres de terrain ou grâce à desimages satellitaires. Cette étude propose une méthode de prédiction spatialisée du CO des sols, à partir d'imageriedrone. Une parcelle agricole de 13 ha « la Grande Borne », située dans la plaine de Versailles (78), a été suivie en avril2013, pe

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GHANASHYAM KRISHNA, M., A. HARTRIDGE, and A. K. BHATTACHARYA. "STRUCTURE AND OPTICAL PROPERTIES OF NANOCRYSTALLINE GADOLINIUM DOPED ZIRCONIA THIN FILMS." International Journal of Modern Physics B 16, no. 26 (2002): 4017–25. http://dx.doi.org/10.1142/s0217979202014619.

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Transparent sols of crystalline gadolinium doped zirconia particles with the general formula Zr 1 - x Gd x O 2 - x/2 (where x = 0–0.20), were prepared by a hydrothermal sol-gel method using cheap inorganic precursors. The composition, structure, crystallite size and lattice parameters of the crystalline dried sol particles and heated powders were studied. Thin films were deposited on quartz substrates using a simple dipping process and the structure, composition and crystallite size found to be identical to the powders with respect to the variation in temperature. Spectral transmittance studie

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MIGNON-GRASTEAU, S., M. BOURBLANC, B. CARRE, et al. "La réduction des rejets avicoles et porcins par la sélection." INRAE Productions Animales 23, no. 5 (2010): 415–26. http://dx.doi.org/10.20870/productions-animales.2010.23.5.3320.

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Du fait de leur forte concentration dans certaines zones en France, les productions avicoles et porcines sont associées à de nombreux problèmes environnementaux dus à l’épandage de leurs rejets. Outre la quantité brute de rejets, leur composition,&nbsp;notamment en azote, phosphore et oligoéléments, est une source de pollution des eaux et des sols. Jusqu’ici, les solutions envisagées pour réduire ces rejets portaient soit sur le traitement a posteriori des rejets, soit sur la réduction des rejets en amont, essentiellement en modifiant les régimes alimentaires des animaux. La sélection d’an

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Mitkova, Eva, Irina Stambolova, Daniela Stoyanova, Vesislava Toteva, and Ognian Dimitrov. "CORRELATION BETWEEN AGING TIME PERIOD OF METAL PRECURSOR SOL – PHASE COMPOSITION AND TEXTURAL PROPERTIES OF ZIRCONIA NANOPOWDERS." Journal of Chemical Technology and Metallurgy 59, no. 1 (2024): 223–30. http://dx.doi.org/10.59957/jctm.v59.i1.2024.26.

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This article investigates the effect of the time of aging of ZrO2 powders, obtained from zirconium butoxide sols, stabilized using complexating agents on the volume phase fractions tetragonal phase (T) and baddeleyite crystalographic phase (B), pore size distribution and pore volume. It was proved that the aging time period influences ratio between these two polymorphs of zirconia. The sample Zr3d possesses the largest content of baddeleyite phase having the greatest crystallites in comparison to another two powders. The increasing of aging period leads to a gradual increase in (101) peak inte

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Ellateif, Tayseir M. Abd, Saikat Mitra, T. Murugesan, and Khairun Azizi Azizli. "Preparation and Characterization of Hydrophobic Silica Zirconium Nanoparticles." Applied Mechanics and Materials 625 (September 2014): 503–8. http://dx.doi.org/10.4028/www.scientific.net/amm.625.503.

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Hydrophobic silica nanoparticles were synthesized by silica sols modified with different percentage of zirconium sol using liquid modification. The hydrophobicity test demonstrated that silica zirconium nanoparticles are more hydrophobic as they showed 1% to 5% weight gain compared to 8% for pure silica nanoparticles. The synthesized silica nanoparticles were characterized using different techniques to investigate the effect of zirconium modification on silica nanoparticles characteristics. Structure and composition of unmodified silica nanoparticles and modified one were studied using FTIR; t

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