14 Result(s)

Article

Results of R-ESHAP as salvage therapy in refractory/relapsed follicular lymphoma: a real-world experience on behalf of GELCAB group

There is no standard treatment for relapsed follicular lymphoma (FL). Although platinum-based combinations are one of the most used treatments, few data have been reported in this setting. Our aim was to analy...

A. Muntañola, T. Baumann, A. C. Caballero, B. Sánchez-González… in Annals of Hematology (2020)

Article

Diagnostic delay and outcome in immunocompetent patients with primary central nervous system lymphoma in Spain: a multicentric study

To assess the management of immunocompetent patients with primary central nervous system lymphomas (PCNSL) in Spain.

R. Velasco, S. Mercadal, N. Vidal, M. Alañá, M. I. Barceló… in Journal of Neuro-Oncology (2020)

Article

Preparation and characterization of stable aqueous suspensions of up-converting Er³⁺/Yb³⁺-doped LiNbO₃ nanocrystals

The preparation of LiNbO₃:Er³⁺/Yb³⁺ nanocrystals and their up-conversion properties have been studied. It is demonstrated that polyethyleneimine- (PEI) assisted dispersion procedures allow obtaining stable aqueou...

M. Villegas, A. C. Caballero, M. Quintanilla, J. A. Sanz-García… in Applied Physics B (2011)

Article

Preparation and properties of Bi₆Ti₅WO₂₂: a new phase in the Bi₂O₃–TiO₂–WO₃ system

In a recent report, the evaluation of the phase relations in the Bi₂O₃–TiO₂–WO₃ ternary system has shown the existence of a new phase with nominal composition close to Bi₆Ti₅WO₂₂. In the present contribution we a...

T. Jardiel, A. C. Caballero, L. Fuentes, M. Villegas in Journal of Materials Science (2009)

Article

Thermal evolution of ZnO-Bi₂O₃-Sb₂O₃ system in the region of interest for varistors

In facing the design of new processing strategies for ZnO based ceramic varistors, a precise control of its microstructural development during sintering is demanded. Addition of dopants to zinc oxide results i...

M. Peiteado, M. A. De La Rubia, J. F. Fernández… in Journal of Materials Science (2006)

Article

Electrical Properties of Bismuth Titanate Based Ceramics with Secondary Phases

Bi₄Ti₃O₁₂ (BIT) based ceramics were prepared by hydroxide coprecipitation method and subsequent treatment at 650^∘C for 1 h. Calcined BIT was doped with different amounts of WO₃ by surface do** using W(C₂H₅O)₆. ...

M. Villegas, T. Jardiel, A. C. Caballero, J. F. Fernández in Journal of Electroceramics (2004)

Article

Bulk Grain Resistivity of ZnO-Based Varistors

We study the temperature dependence of grain resistivity in ZnO ceramic varistors (300–430 K), finding a positive temperature coefficient (PTC). We devise a high-frequency procedure that allow us to obtain the...

A. C. Caballero, D. Fernández Hevia, J. de Frutos… in Journal of Electroceramics (2004)

Chapter

Bi₄Ti₃O₁₂-Based Piezoelectric Ceramics for High Temperature Applications

High temperature piezoelectric ceramics based on WO₃-doped Bi₄Ti₃O₁₂ (WBIT) were prepared by two ways: chemical (hydroxide coprecipitation) and conventional oxides mixing. Sintering was carried out between 800°-1...

M. Villegas, A. C. Caballero, C. Moure… in Piezoelectric Materials: Advances in Scien… (2000)

Article

Effect of humidity on the electrical response of porous BaTiO3 ceramics

A. C. Caballero, M. Villegas, J. F. Fernández… in Journal of Materials Science Letters (1999)

Article

Effects of PbO excess in Pb(Mg_1/3Nb_2/3)O₃–PbTiO₃ ceramics: Part I. Sintering and dielectric properties

The influence of the presence of free PbO on densification, the perovskite/pyrochlore phase ratio, and corresponding dielectric properties has been studied for 0.9 PMN–0.1 PT-based ceramics with different adde...

M. Villegas, A. C. Caballero, M. Kosec, C. Moure… in Journal of Materials Research (1999)

Article

Effects of PbO excess in Pb(Mg_1/3Nb_2/3)O₃–PbTiO₃ ceramics: Part II. Microstructure development

The microstructure evolution of Pb(Mg_1/3Nb_2/3)O₃ –PbTiO₃ (PMN-PT) based ceramics has been investigated to determine the influence of the presence of PbO content in excess of stoichiometric values. The microstruct...

M. Villegas, J. F. Fernáandez, A. C. Caballero… in Journal of Materials Research (1999)

Article

Ceramic–electrode interaction in PZT and PNN–PZT multilayer piezoelectric ceramics with AG/PD 70/30 inner electrode

Pb(Zr0.53Ti0.47)O3(PZT) and PbNi1/3Nb2/3O3-PZT (PNN–PZT) multilayers with Ag/Pd 70/30 inner electrodes have been studied from the point of view of the ceramic–electrode interaction. PZT multilayers have shown ...

A. C Caballero, E Nieto, P Duran, C Moure, M Kosec… in Journal of Materials Science (1997)

Article

Improving sintering behaviour of BaTiO₃ by small do** additions

The dielectric properties of BaTiO₃ ceramics are associated with its microstructure, which depends on the stoichiometric ratio, dopant nature, and ceramic processing. Optimum densification at low temperatures to ...

J. F. Fernández, A. C. Caballero, P. Durán, C. Moure in Journal of Materials Science (1996)

Article

Phosphor-doped BaTiO₃: Microstructure development and dielectric properties

The phosphor cation retards BaTiO₃ formation during the first reaction stage, and favours Ba₂TiO₄ formation. As a consequence, the end of the reaction is only accomplished at 1150 °C. The average particle size of...

A. C. Caballero, J. F. Fernández, P. Durán, C. Moure in Journal of Materials Science (1995)