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Synthesis and Structural Properties of Niobium Pentoxide Powders: A Comparative Study of the Growth Process
(Materials ResearchBrasilia , Brasil, 2016-10-10)
Powders Nb2 O5 were prepared by two different synthesis method, Sol-Gel and polymeric precursors (Pechini). In the Pechini method before adding the citric acid in the process, four different solutions were used to get the ...
Microstructure of organometallic derived PLZT ceramics
(Elsevier B.V., 2001-01-01)
The PLZT powders with the formula Pb0.905La0.095(Zr0.65Ti0.35)(0.976)O-3+3.5 wt.% PbO were prepared by the organometallic precursor method (Pechini and partial oxalate processes). The microstructure of sintered 9.5/65/35 ...
Synthesis and characterization of 9.5/65/35 PLZT prepared from the polymeric precursors
(Elsevier B.V., 2001-01-15)
The 9.5/65/35 PLZT was prepared from the polymeric precursors (the Pechini and partial oxalate process) and by sintering in two stages in an oxygen atmosphere. After thermal treatment at 400 degreesC, the powders were ...
Uso de métodos químicos para obtener polvos cerámicos del sistema (Sn, Ti)O2
(2005-07-01)
The (Sn,Ti)O2, system has a great interest due to its technological applications such as gas sensor and varistor. Although the thermodynamic properties and the kinetics of spinoidal decomposition in this system have been ...
Filmes finos de Titanato de Chumbo e Lantânio - PLT: influência do pH
(Associação Brasileira de Cerâmica, 2000-12-01)
Filmes finos de PbTiO3 dopados com 27% de lantânio, depositados em substratros MgO (100), foram preparados pelo método dos precursores poliméricos (Pechini). As resinas, das quais são obtidos os filmes, ao término do ...
Influence of synthesis and processing parameters of the columbite precursor on the amount of Perovskite PMN
(ABM, ABC, ABPol, 1999-10)
Columbite route for synthesis of P3MgNb2O9 (PMN) allows the suppression of secondary phases in PMN powders. These phases, having low dielectric constant, affect negatively the dielectric properties of PMN ceramics. Aiming ...
Substitutional Ta-doping in Y2O3 semiconductor by sol-gel synthesis: Experimental and theoretical studies
(IOP Publishing, 2017-07)
The Pechini sol-gel method has been employed for the synthesis of pure and (181Hf→)181Ta-doped Y2O3 nanopowders. We performed a structural characterization from the micro to the subnanoscopic scale by means of scanning ...
Effects of powder preparation and sintering procedure on microstructure and dielectric properties of PLZT ceramics
(Int Inst Science Sintering (i I S S), 2003-09-01)
PLZT ceramics belong to one of the very important groups of functional materials that make a basis for the production of a large range of electronic devices. The microstructure and properties of ceramics depend on the ...
Preparation and characterization of Mo/W bimetallic carbides by using different synthesis methods
(SPRINGER, 2008)
Molybdenum and tungsten bimetallic oxides were synthetized according to the following methods: Pechini, coprecipitation and solid state reaction (SSR). After the characterization, those solids were carbureted at programmed ...
Influence of oxygen flow on crystallization and morphology of PLZT thin films
(Elsevier B.V., 2002-01-01)
PLZT thin films were prepared by a dip coating process using Pechini's method, also known as polymeric precursor method. The PLZT solution was obtained from a mixture of the individual cation solutions and the process to ...