Results 61 to 70 of about 5,091 (223)
Chemical Synthesis and Characterizations of SrSi2O2N2: Eu2+ Phosphors for White LEDs Applications [PDF]
白光发光二极管(whitelight-emittingdiodes,WLEDs)具有寿命长、能耗低以及结构紧凑等优点,因此被广泛的关注。目前,基于蓝光LED的荧光粉转换WLEDs(phosphor-converted-WLEDs,PC-WLEDs)是市场的主流,该方案需要搭配荧光粉以产生白光。因此,荧光粉是PC-WLEDs的关键材料之一。 为了获得较高显色指数的PC-WLED,绿色荧光粉是必不可少的。SrSi2O2N2:Eu2+(SSON)是一种性能优异的绿色荧光粉,具有较高的量子效率,较宽的吸收带 ...
DHIA ABDULMUHSIN HASSAN AAL-MO
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The abnormal expansion associated with the simultaneous synthesis and sintering of Zn2SnO4 from ZnO and SnO2 is due to the reaction mechanism and correlated with the conversion. This phenomenon opens the way to manufacture porous ceramics without the addition of pore generators, simplifying the process, and especially the thermal treatment.
María José Orts +3 more
wiley +1 more source
Synthesis and Characterization of Nano-Particles of Niobium Pentoxide with Orthorhombic Symmetry
In this work, a set of nanoparticles of Nb2O5 nanoparticles were grown by both the Pechini and the sol-gel methods. The amorphous materials were calcined at 650 #xB0;C or at 750 °C.
Miryam Rincón Joya +4 more
doaj +1 more source
Síntesis y refinamiento de la estructura de Dióxido de Titanio dopada con Cromo (Ti1-xCrxO2) [PDF]
Mediante el método de ajuste de refinamiento estructural o método de Rietveld, se realizó la estimación de los parámetros de red de dióxido de titanio (TiO2) dopado con cromo (Cr).
Giraldo García, Andrés Felipe +1 more
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This study reveals an atomic‐level correlation between bulk dislocations and the exsolution of surface nanoparticles through a novel approach for dislocation engineering in epitaxial thin films. Employing in situ scanning transmission electron microscopy, two primary reasons for the frequent nucleation of dislocation‐associated nanoparticles are ...
Moritz Lukas Weber +8 more
wiley +1 more source
Modified Pechini Processing of Barium and Lanthanum-Lithium Titanate Nanoparticles and Thin Films
Barium-strontium titanate (BST) Ba0.6Sr 0.4 TiO3 and lanthanum-lithium titanate (LLT) La0.5Li0.5TiO3 nanopowders and thin films have been obtained via the modified Pechini route.
A. Suslov +6 more
doaj +1 more source
Síntesis y caracterización de recubrimientos absorbentes selectivos para calentadores solares [PDF]
En la actualidad existen muchos problemas ambientales asociados al alto consumo energético y a la necesidad del hombre por satisfacerlo, generando entonces contaminación de las fuentes hídricas, polución, tala de árboles, entre otras; la mayoría de estos
Moreno Soto, Jeiner Orlando
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Sol–gel synthesis and sintering of submicronic copper molybdate (α-CuMoO4) powders [PDF]
A sol–gel method was proposed to prepare copper II molybdate α-CuMoO4 powders. A gel was first obtained via the polymerizable complex method, using citric acid as complexing and polymerizing agent, dried at 120 °C and decomposed at 300 °C.
Benchikhi, Mohamed +5 more
core +2 more sources
Redox‐Active Oxide/molten Salt Composites for Hybrid Thermal‐Chemical Energy Storage
Redox‐active oxide–molten salt composites integrate sensible, latent, and thermochemical energy storage within a single particle. A porous Ca2AlMnO5+δ matrix infiltrated with eutectic NaCl/CaCl2 achieves a high‐energy density (267 kJ kg−1) over a narrow, 150 °C temperature window, offering a promising solution for high‐temperature thermal energy ...
Runxia Cai +6 more
wiley +1 more source
Síntesis y catálisis de las perovskitas MgTiO3 y CaTiO3 [PDF]
Las Perovskitas son una especie de solidos cristalinos que catalizan reacciones de degradación en colorantes, en el siguiente artículo se expresa el proceso de obtención de dichas perovskitas( MgTiO3 Y CaTiO3,) por el método de Pechini con algunas ...
Benavides Benavides, Ana Milena +1 more
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