10 documents found, page 1 of 1
Synthesis of nanocrystalline tetragonal zirconia by a polymeric organometallic ...
Quinelato, Antonio L.; Longo, Elson; Leite, Edson R.; Varela, José A. [UNESP]Made available in DSpace on 2022-04-29T08:46:50Z (GMT). No. of bitstreams: 0 Previous issue date: 1999-01-01; A polymeric precursor method based on the Pechini process was successfully used to synthesize zirconia-12 mol% ceria ceramic powders. The influence of the main process variables (citric acid-ethylene glycol ratio, citric acid - total oxides ratio and calcination temperature) on phase formation and powde...
New method to control particle size and particle size distribution of SnO2 nano...
Leite, Edson R.; Weber, Ingrid T.; Longo, Elson; Varela, José A. [UNESP]Made available in DSpace on 2022-04-29T08:46:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-07-05; The nucleation and growth of the SnO2 were controlled using the Nb2O5 as additive. Preliminary gas sensing measurements revealed that the response time of the Nb2O5-doped SnO2 is faster than that of the undoped material.; LIEC Department of Chemistry UFSCar, Via Washington Luiz, Km. 235, CP-676, CEP-135...
Preparation and characterization of in(OH)3: Eu nanostructures obtained by micr...
Motta, Fabiana V.; Marques, Ana Paula A.; Paskocimas, Carlos A.; Bomio, Mauricio R. D.; Abreu, Maria Fernanda C.; Li, Máximo S.; Leite, Edson R.Made available in DSpace on 2022-04-29T09:12:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-03-01; Crystalline europium-doped indium hydroxide (In(OH)3:Eu) nanostructures were prepared by a rapid and efficient Microwave-Assisted Hydrothermal (MAH) method. Nanostructures were obtained at a low temperature. FE-SEM images confirm that these samples are composed of 3D nanostructures. XRD, optical diffuse...
Giant dielectric constant materials and their applications
Varela, José A. [UNESP]; Orlandi, Marcelo O. [UNESP]; Ramirez, Miguel A. [UNESP]; Foschini, Cesar R. [UNESP]; Felix, Anderson A. [UNESP]Made available in DSpace on 2022-04-29T10:20:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-01; There is a constant need in the modern electronic industry for capacitors with high capacity per volume in order to use in many applications such as memories devices, energy storage, microwave filters, among others. The synthesis, characterization and study of materials with a very high or giant dielect...
An overview on the photoluminescence emission in ZNO single crystal. A joint ex...
Lima, Renata C.; Andrés, J.; Sambrano, Júlio R. [UNESP]; Longo, Valéria M. [UNESP]; Macário, Leilane R. [UNESP]; Espinosa, José W. M.; Pizani, Paulo S.Made available in DSpace on 2022-04-29T07:13:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-12-01; The purpose of the present chapter is to join both the experimental and theoretical results to explain the different responses of photoluminescence (PL) emission at room temperature of ZnO powders by using different structural order-disorder effects, associated with intermediate and short range defects....
Atomic Force Microscopy: A Powerful Tool for Electrical Characterization
Tararam, Ronald [UNESP]; Garcia, Pâmela S.; Deda, Daiana K.; Varela, José A. [UNESP]; de Lima Leite, FábioMade available in DSpace on 2022-04-30T05:15:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-03-23; The fundamental principle of atomic force microscopy (AFM) is to obtain images of a surface by measuring deflections on a nanoscale probe. In its more than 25-year history, AFM has had its scope rapidly expanded to various scientific fields. Several techniques derived from this microscopy have appeared ...
Controlling the breakdown electric field in SnO2 based varistors by the inserti...
Masteghin, Mateus G. [UNESP]; Varela, José A. [UNESP]; Orlandi, Marcelo O. [UNESP]Made available in DSpace on 2022-05-02T18:17:49Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-04-01; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Semiconducting metal oxides have many practical applications, including varistors. Varistors based on SnO2 exhibit both high nonlinear coefficients and high breakdown elec...
Magnetoelectric properties of la-modified BiFeO3 thin films on strontium ruthen...
Deus, Regina C. [UNESP]; Foschini, César R. [UNESP]; Varela, José A. [UNESP]; Longo, Elson [UNESP]; Simões, Alexandre Z. [UNESP]Made available in DSpace on 2018-12-11T17:24:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-15; This paper focus on the magnetoelectric coupling (ME) at room temperature in lanthanum modified bismuth ferrite thin film (BLFO) deposited on SrRuO 3-buffered Pt/TiO2/SiO2/Si (100) substrates by the soft chemical method. BLFO film was coherently grown at a temperature of 500°C. The magnetoelectric coeff...
Role of oxygen on the phase stability and microstructure evolution of CaCu3Ti4O...
Felix, Anderson A. [UNESP]; Bezzon, Vinícius D.N. [UNESP]; Orlandi, Marcelo O. [UNESP]; Vengust, Damjan; Spreitzer, Matjaž; Longo, Elson [UNESP]Made available in DSpace on 2018-12-11T17:06:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Phase stability and microstructure evolution of polycrystalline CaCu3Ti4O12 (CCTO) ceramics were studied by controlling the partial pressure of oxygen (from a poor to an oxygen rich atmosphere) during the sintering process at high temperatur...
Antimicrobial activity of TiO2:Ag nanocrystalline heterostructures: Experimenta...
André, Rafaela S.; Zamperini, Camila A. [UNESP]; Mima, Ewerton G. [UNESP]; Longo, Valéria M.; Albuquerque, Anderson R. [UNESP]Made available in DSpace on 2018-12-11T16:58:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-09-28; Made available in DSpace on 2018-12-11T16:58:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-09-28; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); We report the synthesis and characterization of silver-...