Alicia Duran

• Dr in Physics, Research Professor CSIC
• Professor at Institute of Ceramics and Glass

Eu/Ag-co-doped transparent oxyfluoride glass-ceramics based on LaF3 have been obtained by melt-quenching followed by structural analysis employing X-ray diffraction and transmission electron microscopy. Absorption spectra showed only Eu3+ ion transitions, irrespective of the presence of silver or the atmosphere used in the preparation. Excitation s...

Nd3+-doped, LaF3-based, transparent oxyfluoride glass-ceramics (GCs) containing Ag nanoparticles (NPs) have been prepared by a melt-quenching method. Different Ag-containing precursors were employed, with AgNO3 as the most suitable for obtaining Ag NPs segregated in the glassy matrix. Transmission electron microscopy and X-ray absorption spectrosco...

Tm3+ doped oxyfluoride glass-ceramics (GCs) containing NaLaF4 nanocrystals (NCs) have been obtained by spark plasma sintering (SPS). First, the precursor glasses were melted and then milled and sieved to a suitable particle size. Glass powder pellets were sintered by spark plasma sintering under vacuum conditions. The SPS processing parameters (tem...

Transparent oxyfluoride glass-ceramics (GCs) containing NaLuF4 nanocrystals doped with Er3+ have been prepared by combination of glass melt-quenching and spark plasma sintering (SPS) of glass powders. The parameters, such as temperature, pressure, particle size and holding times were optimized to obtain the densification of the powdered samples tog...

Glass beads of the Sr2MgSi2O7 stoichiometric composition and a non-stoichiometric composition with higher SiO2/SrO ratio doped with Eu2O3/Dy2O3 were prepared through aerodynamic levitation coupled to CO2 laser heating. The glass beads were subsequently treated at 1100 ºC to produce glass-ceramics with Sr2MgSi2O7: Eu²⁺, Dy³⁺ as the main crystalline...

2022 está siendo un año crucial para el vidrio. Ha sido reconocido como el Año Internacional del Vidrio (IYOG2022) por la Organización de las Naciones Unidas (ONU) para poner en valor la importancia y versatilidad de este material a lo largo de la historia y las numerosas aplicaciones que tiene hoy en día a nivel cultural, científico, social y econ...

Transparent oxyfluoride glass-ceramics (GCs) containing KLaF4 nanocrystals (NCs) doped with Nd³⁺were prepared by Spark Plasma Sintering (SPS). Glass powder pellets were sintered under a vacuum atmosphere, optimizing the processing parameters such as particle size, pressure, temperature, and holding time to obtain full densification. Transparency de...

Transparent NaLuF4 glass‐ceramics (GCs) doped with Tm³⁺ and Tm³⁺/Yb³⁺ have been prepared by melting‐quenching followed by thermal treatment at temperatures near the glass transition temperature. The crystallization process has been studied using X‐ray diffraction (XRD) and high‐resolution transmission electron microscopy (HRTEM). NaLuF4 nanocrystal...

Glass-ceramics based on the Eu2O3/Dy2O3-doped Sr2MgSi2O7 phosphor have been obtained from sintering and crystallization of glass powders. The doped parent glasses show red emission under excitation of UV light. After thermal treatment, the corresponding glass-ceramics show persistent blue emission which emanates from Eu²⁺ incorporated in the crysta...

Eu²⁺-doped alkaline-earth silicates are the second most studied group of persistent luminescent inorganic phosphors after aluminates, such as SrAl2O4. Silicates are comparable with the aluminates in terms of chemical stability, high quantum efficiency and large band gap, but offer advantages including better water resistance and lower calcination t...

In this study, transparent oxyfluoride glass-ceramics (GCs) with NaLaF4 nanocrystals (NCs) were prepared by the sol–gel method for the first time. Three different molar ratios of La(CH3COO)3/Na(CH3COO) were used to obtain the GCs, which were sintered at 450, 550 and 650 °C for 1 min. X-ray diffraction (XRD) was employed to follow the evolution of t...

Magnesium alloys such as AZ91D, has been presented as potential material for temporary implant material since it has a mechanical performance suitable with bone tissue and also degrades in time. The fast degradation at early times of AZ91D alloy could be retarded applying bioactive sol-gel glass coatings. In this work, two compositions of known bio...

Novel glass-ceramic optical fibers containing NaLuF4 nanocrystals doped with 0.5ErF3 and 2YbF3 (mol%) have been prepared by the rod-in-tube method and controlled crystallization. NaLuF4 nanocrystals with a size around 20 nm are obtained after heat treatment at 600 °C. Intense upconverted green and red emissions due to (²H11/2, ⁴S3/2) → ⁴I15/2 and ⁴...

The crystallisation of fluoride nanocrystals (NCs) in chemically and mechanically stable aluminosilicate glasses has showed interesting optical properties even for small crystal fractions (10‐15 wt%). When Rare‐Earth (RE) ions are used as dopants, crystal‐like features can be reproduced and an increase in the emission and/or energy transfer (ET) pr...

Novel transparent oxyfluoride nano-glass-ceramics containing undoped and 0.5 Eu 3+ (mol%) doped NaGdF 4 nanocrystals (NCs), were obtained by sol-gel for the first time. X-ray diffraction (XRD) confirms the precipitation of α-and β-NaGdF 4 NCs with a size ranging between 5 and 24 nm. When the Na:Gd ratio, temperature and heating time are fixed to 0....

Transparent oxyfluoride nano-glass-ceramics (GCs) containing GdF3 nanocrystals undoped and doped with 0.5 Eu³⁺ (mol%) were obtained by a novel sol–gel method after sintering at temperatures such low as 550 °C. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) show the precipitation of GdF3 nanocrystals with size b...

Transparent sodium lutetium fluoride aluminosilicate glasses and glass-ceramics were prepared by the melting-quenching method. The glasses were doped with 0.5mol% Er³⁺ and 0.5Er³⁺-xYb³⁺ (x=2, 4mol%) to obtain efficient up-conversion (UC) emission, as well as infrared emission at ∼1.0 and 1.5μm. After suitable thermal treatment, transparent glass-ce...

The crystallization mechanism of LaF3 in sol-gel oxyfluoride glass-ceramics in the system SiO2-LaF3 has been studied using DTA, XRD, FTIR, HRTEM and NMR. Based on classical calculations of non-isothermal DTA curves involving Ozawas's plots, a diffusion-controlled process should be responsible for the fluorides crystallization similarly to that obta...

Transparent glass-ceramics have shown interesting optical properties for several photonic applications. In particular, compositions based on oxide glass matrices with fluoride crystals embedded inside, known as oxyfluoride glass-ceramics, have gained increasing interest in the last few decades. Melt-quenching is still the most used method to prepar...

Transparent oxyfluoride nano-glass-ceramics (GCs) containing NaGdF4 nanocrystals doped with 0.1Pr³⁺and 0.5Pr³⁺, and co-doped with 0.5Pr³⁺−2Yb³⁺ ions (mol%) were obtained by melting-quenching followed by heat treatments at temperatures near Tg. The addition of rare-earths (RE) ions affects the crystallization kinetics due to the progressive increase...

Transparent glass-ceramic (GC) films and self-supported layers of composition 80SiO2-20LaF3 doped with Nd³⁺ were prepared by sol-gel method for the first time. GC films were deposited by dip coating on different substrates and heat treated between 350 °C and 850 °C for 1, 3 and 80 h. The structural analysis of thin films was performed by GI-XRD and...

In the last years, new materials with improved optical properties have been demanded thanks to the increment of interest in novel photonic systems. Oxyfluoride glass-ceramic (GCs) materials [1-3], i.e multicomponent materials containing fluoride crystals in an oxide glass matrix, have been considered as promising candidate, due to the low phonon en...

Transparent oxyfluoride glass-ceramic fibers containing LaF3 nano-crystals have been drawn using the single crucible method and crystallization after a proper heat treatment. Optical fibers have been obtained a posteriori through the deposition of a SiO2 cladding prepared by sol-gel and deposited by dip-coating. A detailed thermal and structural ch...

Rare-earth (RE) doped nanostructured oxyfluoride glass-ceramics (GCs), have been widely studied due to the low phonon energy environments of fluoride (300-400 cm-1) and the mechanical advantages of oxide glasses. The principal applications of these materials are in photonic area, such as infrared and tunable phosphors [1], three-dimensional colour...

Rare-earth (RE) doped nanostructured oxyfluoride glass-ceramics (GCs), have been widely studied associated with the low phonon energy environments of fluoride (300-400 cm-1) and the advantages of oxide glasses. The principal applications of these materials are in photonic area, such as infrared and tunable phosphors [1], three-dimensional colour op...

Depending on the composition, cubic (-phase) and hexagonal (-phase) KLaF4 nanocrystals has been precipitated in a 70SiO2–7Al2O3–16K2O–7LaF3 (mol%) glass doped with four different Nd3+ concentrations (0.1-2 mol%). The glass-ceramics were prepared by heat treatment above the corresponding glass transition temperature (Tg + 20 – 60oC). Using X-ray d...

Spark Plasma Sintering (SPS) is a powerful technology that combines fast heating rate with high uniaxial pressure, which allows obtaining highly densified compacts at low sintering temperature and short holding time. A transparent oxyfluoride glass-ceramic of the composition 70SiO2–7Al2O3–16K2O–7LaF3 (mol%.) doped with 0.1NdF3 (mol%.) has been prod...

The growing field of photonics is continuously demanding new materials with improved optical properties. Oxyfluoride glass-ceramics (GCs) materials [1], i.e multicomponent materials containing fluoride crystals in an oxide glass matrix, have been considered as promising materials, due to the low photon energy of fluoride crystals (300-400 cm-1) tog...

Two compositions of 58S (60 mol% SiO2, 36 mol% CaO, 4 mol% P2O5) glass coatings were made by sol-gel and applied by dip coating onto two commercial magnesium alloys (AZ31 and AZ91) as a strategy to retard the hydrogen evolution and accelerate the deposition of a hydroxyapatite layer to enhance bioactivity. Surface studies with x-ray photoelectron s...

Er3+-doped and Er3+-Yb3+-co-doped transparent oxyfluoride glass-ceramics (GCs) containing LaF3 nano-crystals (NCs) have been prepared by the melting-quenching method and adequate thermal treatments. A detailed structural characterization, performed by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HR-TEM), confirms th...

Transparent oxyfluoride nano-glass-ceramics have been prepared by melting-quenching and doped with five different Nd³⁺ concentrations (0.1–2 mol%) to obtain the most efficient ⁴F3/2 → ⁴I11/2,13/2 emission. It was observed by differential thermal analysis (DTA) that the addition of Nd³⁺ does not affect the crystallization mechanism which corresponds...

Structural Features of LiPON Glasses Determined by 1D and 2D 31P MAS NMR International Journal of Applied Glass Science 7[1] 69–79 (2016). DOI: 10.1111/ ijag.12120 In the article above, figures 3 and 4 were published with errors. The corrected figures are shown below.

Pr3+–Yb3+ co-doped oxyfluoride glasses and glass-ceramics (GCs) containing LaF3 nanocrystals have been prepared to obtain NIR emission of Yb3+ ions upon Pr3+ excitation in the blue region of the visible spectrum. Two different compositions have been tested: 0.1–0.5 Pr–Yb and 0.5–1 Pr–Yb, in addition to Pr3+ singly doped samples. The crystallization...

Nanocrystallization of KLaF4 in a 70 SiO2-7 Al2O3-16 K2O-7 LaF3 (mol%) glass co-doped with 0.2 mol% Tm2O3 and 0.5 mol% YbF3 was achieved by heat treatment above the glass transition temperature. KLaF4 nanocrystals of 6 nm precipitated and the crystal size was constant from 10 to 150 h of annealing time. The crystalline fraction achieved was very lo...

Transparent oxyfluoride glass-ceramic fibres containing Nd3+doped- LaF3 nano-crystals were drawn using single crucible method and crystallized before cladding deposition. Optical fibres with Nd-NaGdF4 were also prepared by double crucible method with AR glass cladding.The fibres were optically characterised through PL.

This chapter presents a review of the most recent and relevant works developed by a wide range of researchers on different types of protective and functional coatings deposited on metals and alloys to improve their corrosion resistance. The review is focused on the study of coatings produced by sol–gel trying to identify the perspectives for furthe...

Mg alloys are a good alternative to be used as biodegradable and resorbable implants, but its rate of degradation in the body is too fast. In this work, two types of coatings are studied to control the corrosion speed and to improve the corrosion resistance of magnesium alloy in simulated physiological environment. First, glass-like cerium-based co...

Rare Earth (RE) ions are very important for diverse technological application, as lasers, wavelength downconverters, lighting, etc. Nd3+ is one of the most studied ions due to its potential applications for infrared laser (4F3/2?4I11/2 transition). LaF3 crystals are relevant crystalline phases due to the possibility of including the RE ions inside...

Hybrid inorganic oxides which have simultaneously meso- and macro-porous texture leading to high surface area and high pore volume were prepared by templating in polystyrene monoliths in highly concentrated emulsions. The synthesis was carried out by a two-step method. In the first step, macroporous polystyrene monoliths were prepared using highly...

Two glass compositions 40SiO2·15B2O3·27BaO·18MgO (mol.%) and 40SiO2·15B2O3·27BaO·10MgO·8ZnO (mol.%), with suitable properties for sealing applications in SOFC, have been tested under conditions simulating SOFC stacks. The test method employs two metallic sheets of Crofer22APU, joined together with the glass–ceramic sealants. Experimental tests were...

Oxyfluoride nano-glass-ceramics containing RE ions are extensively studied for their good mechanical and optical properties. They combine the very low phonon energy of fluoride nanocrystals able to host Ln3+ ions giving rise to high quantum efficiencies, with the high chemical and mechanical stability of silicate glass matrix. Melting Quenching (MQ...

Anatase mesoporous TiO2 films doped with Ca were prepared by sol–gel and deposited onto glass slides. The influence of the dopant in the textural and structural properties of the films was studied together with their photocatalytic activity. Titania sols w/o and with Ca were synthesised from titanium isopropoxide as TiO2 precursor, acetic acid as c...

In recent years, rare-earth (RE) doped nanostructured oxyfluoride nano-glass-ceramics (nGCs), which combine low phonon energy fluoride environments for these dopants (300-400 cm-1) with the advantages of oxide glasses respecting to the good mechanical, chemical and thermal stability, have been widely studied. The major objectives are different phot...

Nd3+ doped transparent oxyfluoride nano glass-ceramics obtained by melting and sol-gel G. Gorni1, J. J. Velázquez1, L. Pascual2, Y. Castro1, M. J. Pascual1, J. Fernández3,4, R. Balda3,4, A. Durán1 1Ceramics and Glass Institute (ICV-CSIC), Madrid, Spain 2 Institute of Catalysis and Petrochemistry (ICP-CSIC), Madrid, Spain 3Departamento de Física Apl...

Transparent oxyfluoride nano-glass-ceramics doped with RE ions are very interesting materials for photonics applications. They combine the good mechanical, chemical and thermal stability of oxide glasses with the fluoride crystals, very good host for RE ions and suitable for optical properties due to their low phonon energies. The processing route...

The relationships between structure and electrical properties of nitrided lithium phosphate glasses (LiPON) used as electrolytes for lithium batteries are key issues for better understanding and design of these materials. For the first time, the effect of nitrogen introduction in the structure of lithium phosphorus oxynitride glasses, formulated ov...

One of the recent developments in the joining technology for SOFC is the laser assisted welding. Nowadays, the sealing of the cell is carried out by heating the entire stack in a furnace and through a sintering-crystallization process of the glass powder at the operation temperature (700-900°C). The laser welding implies temperatures above 1200°C b...

Transparent glass-ceramics are nanocomposite materials which offer specific characteristics of capital importance in photonics. This kind of two-phase materials is constituted by nanocrystals embedded in a glass matrix and the respective composition and volume fractions of crystalline and amorphous phase determine the properties of the glass-cerami...

Organic/inorganic hybrid membranes based on (3-glycidoxypropyl) trimethoxysilane (GPTMS) and 3-mercaptopropyl trimethoxysilane (MPTMS) have been prepared by sol–gel method and organic polymerisation, as candidate materials for proton exchange membranes in direct alcohol fuel cell (DMFC) applications. The –SH groups of MPTMS are oxidized to sulfonic...

Transparent glass-ceramics containing Er3+-doped sodium lutetium fluoride nanocrystals for photonic applications have been synthesized. Glass transition temperature, softening temperature, and crystallization temperature were estimated by dilatometry and differential thermal analysis. Proper heat treatments were selected to crystallize lutetium flu...

In the present study, as-prepared silver nanoparticles have been incorporated into SiO2 and TiO2 sols. The characterisation of the silver nanoparticles was performed through transmission electron microscopy, grazing X-ray diffraction, and UV–visible spectroscopy, before and after mixing with the different sols. Multilayer coatings doped with silver...

The study of photocatalytic properties moved forward considerably in the 1960s and 1970s, with many papers focused on the use of TiO2 powders. The coatings prepared using powders bring different problems: one the one hand, the difficulty of fixing the powder on the substrates and, on the other, the need for the catalyst to be transparent to radiati...

A crystallization study of Er3+/Yb3+-doped NaYF4-based nano-glass-ceramics and their optical characterisation is presented. NaYF4 nano-crystals were precipitated from heat treatments close to the glass transition temperature. The crystallization process occurs from a constant number of nuclei. The increase of dopant ions has a nucleating effect. Cr...

Ordered mesoporous coatings, especially those structured as channels in three dimensions, could be applied as thin proton conducting membranes for application in proton exchange membrane fuel cells (PEMFC). This kind of materials shows high proton conductivity due to their favourable architecture with small and interconnected porosity. Transparent...

The relationships between structure and electrical properties of nitrided lithium phosphate glasses (LiPON) used as electrolytes for lithium batteries are key issues for better understanding and design of these materials. For the first time, the effect of nitrogen introduction in the structure of lithium phosphorus oxynitride glasses, formulated ov...

Lithium thio-phosphorus oxynitride glasses, LiPOSN, have been prepared by mechanical milling process from the mixture of Li2S and LiPON glass. The anionic substitution of oxygen by sulphur and nitrogen in the phosphate glass structure has been confirmed by 1D 31P solid state nuclear magnetic resonance and x-ray photoelectron spectroscopy. The study...

In this work, SiO2-TiO2 films doped with erbium were prepared by dip-coating sol-gel process onto commercial glass substrates. The surface morphology of the films was characterized using Atomic Force Microscopy while thickness, refractive index, extinction coefficient and porosity of the films were determined by ellipsometric measurements in a wave...

Aluminum and their alloys present good mechanical properties, high electrical and thermal conductivity and low cost of machining that makes them an excellent choice for a wide range of applications. However, when they are exposed to aggressive environments, localized corrosion takes place limiting their applications. In this work, glass-like cerium...

Mesoporous TiO2 films doped with Ca2+, W6+ and nitrogen were obtained by sol-gel method using dip-coating procedure onto glass-slides in order to study the influence of dopants in their textural properties and photocatalytic activity. Titania sols were synthesized with and without dopants using titanium isopropoxide as titanium precursor, two compl...

In this work, highly conductive hybrid organic inorganic membranes loaded with SiO2, TiO2-P2O5 and SiO2-TiO2-P2O5 meso/macroporous particles were prepared via a sol gel process. Meso/macroporous particles were incorporated to hybrid membranes, for improving water retention and enhancing electrochemical performance. These particles with a polymodal...

Thin films of garnet-type Al-doped Li7La3Zr2O12 (LLZ) are prepared by the sol-gel process. Thin films are prepared on MgO substrates by a dip-coating process using a precursor sol from Zr-alkoxide and Li, La and Al nitrates. After the dip-coating, the dried films are calcined at 450 °C to get precursor films. When the precursor films are heat-treat...

A strong effort has been dedicated to develop solid electrolytes for substituting liquid electrolytes in lithium rechargeable batteries. Some of the studied solid electrolytes are amorphous solids based on lithium phosphates, such as the so-called LiPON, firstly published by Bates in 1993, that presents a suitable conductivity to be applied in lith...

Rare-earth (RE) ions-doped oxyfluoride transparent glass-ceramics containing nano-crystalline phases with very low phonon energies like LaF 3 , NaLaF 4 and KLaF 4 combine the superior optical performance of low phonon energy phases with the high mechanical, chemical and thermal stability of oxide silicates. The insertion of the doping RE ions in th...

dx.doi.org/10.3989/cyv.212014

The damage provoked by sand storms in Sahara desert to windscreen of vehicles and solar mirrors is a problem. Different solutions have been proposed, one of them is the application of polymeric coatings, but they rapidly degrade. In this work, we have deposited silica-based sol-gel coatings including silica nanoparticles onto sandblasted glasses. T...

The substitution of nitrogen for oxygen in phosphate glasses might have opened the door for their application in many fields, from the soldering or energy storage technologies to the optics and even in biomaterials science. The main improvement in the properties of phosphate glasses as a result of the nitridation has been the drastic increase of th...

Oxynitride glasses have been studied for already thirty years and nitridation by means of ammonolysis of the phosphate melt is the most suitable way for their synthesis [1]. The great advantage of substituting nitrogen for oxygen is the strong increase in the chemical resistance to water dissolution of the parent phosphate glasses. The building uni...

LiMn2O4 cathode thin films for thin film lithium secondary batteries were prepared by using so-called the "mist CVD process", employing an aqueous solution of lithium acetate and manganese acetate, as the source of Li and Mn, respectively. The aqueous solution of starting materials was ultrasonically atomized to form mist particles, and mists were...

Mesoporous LiFePO4 thin films prepared using a facile and low-cost synthesis approach have been studied as electrodes for Li-ion batteries. LiFePO4 mesoporous films (300 nm) were synthesized by a template-directed sol–gel chemistry coupled with the dip-coating approach, followed by heat-treatment under a reducing atmosphere (10% H2/N2) at temperatu...

In the present study, Ag NPs have been synthesized by colloidal process and incorporated into SiO2 and TiO2 coatings by doping of sol-gel precursors. In other technique, SiO2 and TiO2 films were impregned by Ag+ ions and then they were photoreduced. Ag nanoparticles characterization was carried out through Transmission Electron Microscopy (TEM), Gr...

The technological impact of porous structures in catalytic applications has stepped up the search for innovative shaping tools. A new approach to shape porous structures based on the assembly of hybrid micelles under the influence of a directional driving force, such as the electric field, is proposed in this work. The growth of silica porous coati...

The influence of the addition of 1 mol% Tm2O3 on the nanocrystallization of LaF3 in a glass of composition 55SiO2–20Al2O3–15Na2O–10LaF3 (mol%) has been studied. Tm2O3 affects the phase separation in the glass and delays the onset of crystallization with respect to the undoped glass. Additionally, the maximum LaF3 crystal size is slightly greater th...

Osseointegration is the mean challenge when surgical treatments fight against load-bearing bone diseases. Absolute bone replacement by a synthetic implant has to be completed not only from the mechanics point of view, but also from a biological approach. Suitable strength, resilience and stress distribution of titanium alloy implants are spoiled by...

Los vidrios de fosfato de litio han captado mucha atención en los últimos años por su aplicación como electrolitos sólidos para baterías recargables de litio. Los electrolitos sólidos poseen varias ventajas comparadas con los líquidos: no contaminan, no tienen compuestos orgánicos inflamables y no es necesario un separador que evite el contacto fís...

Sol–gel derived solar control coatings have been deposited by sol–gel on soda-lime substrates, in the form of Bragg mirrors consisting of alternating aluminosilicate glass and titania quarter-wavelength thick multilayer stacks. These were first modelled by the Transfer Matrix Method and then deposited by spin-coating, with the aim of acting both as...

espanolEl proceso sol-gel es un metodo interesante para la produccion de recubrimientos vitreos sobre sustratos vitroceramicos con el fin de mejorar su resistencia al rayado y al desgaste, y proporcionando ademas un aspecto homogeneo, vidriado y brillante que evite los costosos tratamientos finales de pulido. Este trabajo describe la preparacion de...

Nanocrystallisation of the cubic and hexagonal polymorphs of KLaF4 in a 70 SiO2–7 Al2O3–8 K2O–7 LaF3 (mol %) glass has been achieved by heat treatment above the glass transition temperature. For treatment at 580 °C, only the cubic structure crystallises, with a maximum crystallite size of ~ 9 nm. At higher temperatures, crystallisation of the hexag...

Rare-earth (RE) doped transparent glass-ceramics are presented as very promising materials for optical applications. In this work, Transmission Electron Microscopy techniques have been used to structurally characterize a glass of composition 55SiO(2)-20Al(2)O(3)-15Na(2)O-10LaF(3) (mol%), doped with 1 mol% Tm2O3, and the corresponding glass-ceramic....

The damage provoked by sand storms in Sahara desert to windscreen of vehicles and solar mirrors is a problem. Different solutions have been proposed, one of them is the application of polymeric coatings, but they rapidly degrade. In this work, we have deposited silica-based sol-gel coatings including silica nanoparticles onto sandblasted glasses. T...

In the last years, solid state electrolytes have gained much attention for their application in rechargeable lithium batteries. Solid electrolytes possess several advantages compared to liquid ones, such as being non-contaminant, do not have flammable organic compounds and a separator is not needed to prevent physical contact between both electrode...

The substitution of nitrogen for oxygen in phosphate glasses might have opened the door for their application in many fields, from the soldering or energy storage technologies to the optics and even in biomaterials science. The main improvement in the properties of phosphate glasses as a result of the nitridation has been the drastic increase of th...

Los vidrios de fosfato de litio pueden ser utilizados como electrolitos sólidos para baterías de litio. La mejora de sus propiedades tales como conductividad iónica, resistencia térmica y mecánica, y durabilidad química es uno de los objetivos de este trabajo. Esta mejora puede llevarse a cabo mediante la sustitución aniónica del oxígeno por nitróg...

The use of glassy electrolytes in all-solid-state devices may provide numerous advantages, like increased safety, facility of fabrication and miniaturization. Indeed, the amorphous nature of lithium containing glasses allows reaching higher conductivities than those of similar crystalline materials. Lithium phosphates glasses have demonstrated thei...