Results 81 to 90 of about 6,175 (227)

Evaluación de la actividad fotocatalítica de los compuestos A2La2Ti3O10 (A= K, Na, H) a diferentes cargas de cocatalizador [PDF]

open access: yes, 2016
En este artículo se presenta la evaluación de los compuestos A2La2Ti3O10 (A= K, Na y H) frente a la degradación del azul de metileno cuando dichos compuestos se impregnan con NiO, las impregnaciones se efectúan con 0.01%, 0.05% ,0.1% y 0.2% de carga de ...
Díaz Ocampo, Gerardo Obdulio   +1 more
core  

Large-scale synthesis of YSZ nanopowder by Pechini method

open access: yesBulletin of Materials Science, 2014
Yttria-stabilized zirconia nanopowders were synthesized on a relatively large scale using Pechini method. In the present paper, nearly spherical yttria-stabilized zirconia nanopowders with tetragonal structure were synthesized by Pechini process from zirconium oxynitrate hexahydrate, yttrium nitrate, citric acid and ethylene glycol.
Morteza Hajizadeh-Oghaz   +2 more
openaire   +2 more sources

Lead‐Free (K0.5Na0.5)NbO3 Unmodified Piezoceramics: A Reduction in the Energetic Budget of Solid State Synthesis and Sintering

open access: yesChemistry–Methods, Volume 5, Issue 12, November 2025.
The temperature of the solid‐state synthesis of pure (K0.5Na0.5)NbO3 piezo‐composition is reduced by using the niobium pentoxide reactant in the mixture of reagents after attrition milling for only 3h: a majoritarian (57 wt.% of the total Nb2O5 content) orthorhombic polymorph Pbam.
Maria Dore   +8 more
wiley   +1 more source

Síntese e caracterização de materiais termoelétricos baseados no sistema CA-Co-O [PDF]

open access: yes, 2014
Mestrado em Engenharia FísicaOs óxidos de metais, como é o caso dos óxidos de cálcio e cobalto, são materiais de elevado interesse tecnológico atendendo às suas propriedades termoelétricas, o que poderá favorecer a sua utilização como conversor de ...
Miyazawa, Keiji
core  

PECHINI SYNTHESIS AND CHARACTERIZATION OF Eu3+ DOPED ZnCo2O4 SPINELS [PDF]

open access: yesPeriódico Tchê Química, 2005
Spinel oxides with the composition ZnCo2O4 and ZnCo2O4:Eu3+ have been synthesized by the Pechini method and characterized by X-ray diffraction, infrared spectroscopy, thermal analysis and scanning electron microscopy. IR spectroscopy revealed the presence of n1 and n2 bands, typical of spinel structures.
P.M. PIMENTEL   +5 more
openaire   +1 more source

Synthesis‐Driven Functionality in High‐Entropy Materials

open access: yesSmall, Volume 21, Issue 44, November 6, 2025.
This review explores how synthesis techniques shape the structure, morphology, and functional properties of high‐entropy materials for energy and electronic applications. By comparing diverse methods through nine key criteria and linking them to material performance, the work offers a practical framework to guide synthesis selection for targeted ...
Anurag Khandelwal   +13 more
wiley   +1 more source

Comportamento térmico do PbTiO3 modificado por terras raras Thermal behavior of rare earth modified PbTiO3

open access: yesCerâmica, 2005
Titanatos de chumbo dopados com itérbio e ítrio, PYbT e PYT foram preparados pelo método Pechini. Os materiais obtidos foram calcinados sobre fluxo de oxigênio em diferentes temperaturas e investigados utilizando-se as técnicas de difração de raios X ...
F. C. D. Lemos   +5 more
doaj   +1 more source

TiO2 sintetizado por el método de precursor polimerico (Pechini): estructura de la resina intermedia [PDF]

open access: yes, 2011
En este trabajo se ha utilizado el método de precursor polimérico (método de Pechini) para sintetizar dióxido de titanio, proceso que ha permitido tener un mayor control sobre la pureza del óxido y el tipo de fase que ha presentado el material obtenido,
Franco, Y., Vargas, M. A.
core  

Sonochemical activation for BaTiO3 synthesis: A rapid and efficient route to the tetragonal phase

open access: yesInternational Journal of Applied Ceramic Technology, Volume 22, Issue 6, November/December 2025.
Abstract Barium titanate is a highly promising ferroelectric material, but its synthesis is often based on lengthy and complex processes. This paper presents the development of an ultrafast synthesis route for producing high‐purity tetragonal BaTiO3. The method combines a brief sonochemical activation (15 min) with conventional calcination. Compared to
E. C. Silva   +9 more
wiley   +1 more source

Síntese de pigmentos pretos à base de Fe, Co e Cr pela rota dos precursores poliméricos Synthesis of Fe-, Co- and Cr-based black pigments by the polymeric precursor route

open access: yesCerâmica, 2006
Pigmentos pretos à base de Co, Fe e Cr foram sintetizados pelo método dos precursores poliméricos. Analizou-se o efeito do tratamento térmico no desenvolvimento da cor e de estabilidade dos pigmentos. O resultado da composição otimizada do pigmento foi a
P. R. G. Gonçalves Jr   +5 more
doaj   +1 more source

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