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Preparation and physical chemistry characterization of new nanostructured oxides catalysts by spray pyrolysis method for the biodiesel production
(2018-01-01)
In this work were synthesized new catalysts of stoichiometries Sr0.8K0.2TiCu0.10O3, Sr0.7K0.3TiCu0.15O3 and Sr0.5K0.5TiCu0.25O3 by spray pyrolysis method. The synthesis conditions were optimized to obtain single phase ...
PBAT-PLA blends used in shopping bags: characterization by differential scanning calorimetry, raman spectroscopy and wide angle x-ray diffraction
(Associação Brasileira de PolímerosFlorianópolis, 2013)
In this work we have investigated the microscopical changes associated with the biodegradation in simulated soil (16 weeks) of poly (butylene adipate-coterephthalate) (PBAT) and poly(lactic acid) (PLA) blends by means of ...
Mechanochemical synthesis of Bi4Ti3O12
(2006-12-01)
Our efforts were directed to the preparation of bismuth titanate - Bi 4e;Ti3O12 (BIT) by mechanically assisted synthesis. The mechanical activation was applied to prepare bismuth titanate, Bi4e;Ti3O12, from bismuth oxide, ...
Effect of molybdenum on the formation of Ti6Si2B in mechanically alloyed Ti-Mo-Si-B powders
(2012-11-26)
This paper discusses on effect of molybdenum on the Ti6Si2B formation in mechanically alloyed and hot-pressed Ti-xMo-22Si-11B (x= 2, 5, 7 and 10 at%) alloys. High-energy ball milling and hot pressing were utilized to produce ...
Nucleation and crystallization of titania nanoparticles in silica titania planar waveguides: A study by low frequency Raman scattering
(2004-07-28)
SiO2 (1-x) - TiO2 (x) waveguides, with the mole fraction x in the range 0.07 - 0.20 and thickness of about 0.4 μm, were deposited on silica substrates by a dip-coating technique. The thermal treatments at 700-900°C, used ...
Conductive nanocomposites based on cellulose nanofibrils coated with polyaniline-DBSA via in situ polymerization
(2012-09-01)
Cellulose nanofibrils (CNF) were extracted by acid hydrolysis from cotton microfibrils and nanocomposites with polyaniline doped with dodecyl benzenesulphonic acid (PANI-DBSA) were obtained by in situ polymerization of ...
Structural study of copper oxide supported on a ceria-modified titania catalyst system
(Kluwer Academic/plenum Publ, 2002-01-01)
A structural study of CuO supported on a CeO2-TiO2 system was undertaken using X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) techniques. The results of XRD revealed the presence of only two phases, TiO2 ...
Influence of oxygen atmosphere on LiNbO3 thin films prepared by Pechini process
(2004-07-27)
Thin films of lithium niobate were deposited on the Pt/Ti/SiO2 (111) substrates by the polymeric precursor method (Pechini process). Annealing in static air and oxygen atmosphere was performed at 500°C for 3 hours. The ...
Sintering temperature influence on microwave dielectric properties of TiO2-ZrO2 ceramics
(2010-12-15)
Dielectric ceramics have been widely investigated and used for microwave applications such as resonators and filters. The present study deals with the influence of sintering temperature on microwave dielectric properties ...