Listar por autoría "ec5bf3d3-958c-49cc-8eb0-0f7197142831"

Mostrando ítems 1-19 de 19

    • closedAccess   Brown ceramic pigments based on chromium(III)-doped titanite obtained by spray pyrolysis 

      Lyubenova, Teodora; Ocaña Jurado, Manuel; Carda Castelló, Juan Bautista Elsevier (2008)
      Cr-doped titanite (CaTiSiO5) pigments were synthesized through spray pyrolysis of aerosols generated from aqueous solutions containing colloidal silica, calcium chloride, titanium(IV) oxychloride and chromium(III) nitrate. ...

    • closedAccess   Ceramic pigments with sphene structure obtained by both spray- and freeze-drying techniques 

      Lyubenova, Teodora; Matteucci, Francesco; Costa, Anna Luisa; Dondi, Michele; Carda Castelló, Juan Bautista Elsevier (2009)
      The present study is focused on the procedure of spray- and freeze-drying techniques for the preparation of Cr-doped sphene pigments (CaSn0.98Cr0.02 SiO5, CaTi0.98Cr0.02SiO5) from an aqueous solution of precursor salts, ...

    • openAccess   Developing CIGS solar cells on glass-ceramic substrates 

      Fraga Chiva, Diego; BARRACHINA ALBERT, ESTER; Calvet Roures, Iván; Lyubenova, Teodora; Carda Castelló, Juan Bautista Elsevier (2018)
      Cu(In,Ga)Se2 (CIGS) is a p-type semiconductor material and an attractive absorber for thin films solar cells due to its unique optical and electrical properties. The low cost of this technology is based on its application ...

    • closedAccess   Development of photovoltaic ceramic tile based on CZTSSe absorber 

      Calvet Roures, Iván; BARRACHINA ALBERT, ESTER; Martí Valls, Rafael Francisco; Fraga Chiva, Diego; Lyubenova, Teodora; Carda Castelló, Juan Bautista Elsevier (2015)
      Ceramic photovoltaic tile based on Cu2ZnSn(S,Se)4 semiconductor has been made by low-cost and easy processing method of preparation. Ceramic tile as alternative of soda-lime glass substrate has been used. The molybdenum ...

    • openAccess   Easy and low-cost aqueous precipitation method to obtain Cu2ZnSn(S, Se)4 thin layers 

      Martí Valls, Rafael Francisco; Lyubenova, Teodora; Calvet Roures, Iván; Ladeira de Oliveira, L.; Fraga Chiva, Diego; Carda Castelló, Juan Bautista Elsevier (2017)
      An easy method to obtain kesterite Cu2ZnSn(Se1-x,Sx)4 (CZTSSe) solid solution as an absorber for thin film photovoltaic solar cells is discussed in this report. Particular emphasis is directed toward the procedure´s steps ...

    • openAccess   Ecologic ceramic substrates for CIGS solar cells 

      Fraga Chiva, Diego; Lyubenova, Teodora; Martí Valls, Rafael Francisco; Calvet Roures, Iván; BARRACHINA ALBERT, ESTER; Carda Castelló, Juan Bautista Elsevier (2016)
      In this work the use of porcelain stoneware tiles as alternative substrates for CIGS thin film solar cells for the development of specific applications as those related to building integration (BIPV, BAPV) are reported. ...

    • openAccess   Effect of alkali doping on CIGS photovoltaic ceramic tiles 

      Fraga Chiva, Diego; Lyubenova, Teodora; Martí, R.; Calvet Roures, Iván; BARRACHINA ALBERT, ESTER; Carda Castelló, Juan Bautista Elsevier (2017)
      This report studies the influence of alkali elements (Na, K) to morphological, structural and optoelectronic properties of CIGS ceramic tile solar cell. Several ceramic enamels with altered chemical composition in terms ...

    • openAccess   High-pressure synthesis, structural and complex magnetic properties of the ordered double perovskite Pb2NiReO6 

      Lyubenova, Teodora; Dos Santos García, Antonio J.; Urones Garrote, Esteban; Torralvo, María José; Alario Franco, Miguel Ángel Royal Society of Chemistry (2014)
      The ordered double perovskite Pb2NiReO6 has been prepared at 6 GPa and temperatures ranging from 1273 to 1373 K. Its crystal structure determined by X-ray powder diffraction and selected area electron diffraction shows ...

    • closedAccess   Malayaite ceramic pigments: A combined optical spectroscopy and neutron/X-ray diffraction study 

      Cruciani, Giuseppe; Dondi, Michele; Ardit, Matteo; Lyubenova, Teodora; Carda Castelló, Juan Bautista; Matteucci, Francesco; Costa, Anna Luisa Elsevier (2009)
      Ceramic pigments based on the Cr-doped malayaite structure were synthesized by solid state reaction and characterized by optical spectroscopy and combined X-ray and neutron powder diffraction in order to elucidate the still ...

    • openAccess   Multifunctional smart coatings on novel ceramics and glassceramic substrates in the context of the circular economy 

      Lyubenova, Teodora; Fraga Chiva, Diego; Carda Castelló, Juan Bautista; Kozhukharov, Vladimir; Machkova, Maria S. University of Chemical Technology and Metallurgy (Bulgaria) (2018)
      Nowadays is time of products generated by “smart coatings” that exhibit multiple functionalities. In particular, the construction industry is reached the point where it is possible to fabricate “smart and sustainable” ...

    • openAccess   Photoluminescence of synthetic titanite-group pigments: A rare quenching effect 

      Nasdala, Lutz; Lyubenova, Teodora; Gaft, Michael; Wildner, Manfred; Diegor, Wilfredo; Petautschniga, Christian; Talla, Dominik; Lenz, Christoph Elsevier (2014)
      Chromium-doped titanite and malayaite samples, which were synthesised to evaluate their performance as ceramic pigments, show remarkable photoluminescence behaviour. Emissions of centres related to traces of trivalent ...

    • openAccess   Práctica de laboratorio: Síntesis y depósito de capas fotoabsorbentes tipo CIGS para dispositivos fotovoltaicos 

      Martí Valls, Rafael Francisco; BARRACHINA ALBERT, ESTER; Fraga Chiva, Diego; Calvet Roures, Iván; Lyubenova, Teodora; Carda Castelló, Juan Bautista Universitat Jaume I (2015)

    • openAccess   Preparation of Cu(In,Ga)Se2 photovoltaic absorbers by an aqueous metal selenite co-precipitation route 

      Martí Valls, Rafael Francisco; Oliveira, L.; Lyubenova, Teodora; Todorov, Teodor Krassimirov; Chassaing, E.; Lincot, D.; Carda Castelló, Juan Bautista Elsevier (2015-08)
      In this paper, we report a novel and simple solution-based approach for the fabrication of chalcopyrite Cu(In,Ga)Se2 thin film solar cells. An aqueous co-precipitation method based on metal selenites, M2(SeO3)x (M = Cu, ...

    • openAccess   Síntesis de kesterita Cu2ZnSn(S,Se)4 mediante métodos de hot-injection y solvotermal 

      Fraga Chiva, Diego; Martí Valls, Rafael Francisco; Lyubenova, Teodora; Ladeira de Oliveira, L.; Carda Castelló, Juan Bautista Elsevier (2014-12)
      En el presente trabajo se han sintetizado compuestos con estructura de kesterita Cu2ZnSn(S,Se)4 mediante métodos de síntesis “hot-injection” y solvotermal. Se ha analizado la efectividad de ambos procedimientos sobre las ...

    • closedAccess   Synthesis by pyrolysis of aerosols and ceramic application of Cr-doped CaYAlO4 red–orange pigments 

      Lyubenova, Teodora; Carda Castelló, Juan Bautista; Ocaña Jurado, Manuel Elsevier (2009)
      The synthesis of red–orange Cr-doped YCaAlO4 pigments has been improved (softer thermal conditions and lower environmental impact) and optimised by using the pyrolysis of aerosols method. We also study the crystallochemical ...

    • openAccess   Synthesis of Ceramic Pigments by Non-Conventional Methods for New Ceramic Decoration Technologies 

      Lyubenova, Teodora; Peiró Álvarez, María del Carmen; Rey, A.; Martí Valls, Rafael Francisco; Calvet Roures, Iván; Carda Castelló, Juan Bautista German Ceramic Society (2014)
      The ceramic tile industry increasingly commits to modernisation and implementation of new technologies in the decoration process. Current demands of advanced processes in this fi eld, such as rotational decoration, inkjet ...

    • closedAccess   Synthesis of Cr-doped CaTiSiO5 ceramic pigments by spray drying 

      Lyubenova, Teodora; Matteucci, Francesco; Costa, Anna Luisa; Dondi, Michele; Ocaña Jurado, Manuel; Carda Castelló, Juan Bautista Elsevier (2009)
      Cr-doped CaTiSiO5 was synthesized by spray drying and conventional ceramic method in order to assess its potential as ceramic pigment. The evolution of the phase composition with thermal treatment was investigated by X-ray ...

    • openAccess   Synthesis, deposition and crystal growth of CZTS nanoparticles onto ceramic tiles 

      Calvet Roures, Iván; BARRACHINA ALBERT, ESTER; Martí Valls, Rafael Francisco; Fraga Chiva, Diego; Lyubenova, Teodora; Carda Castelló, Juan Bautista Elsevier (2015-09)
      The work presents a simple solvothermal method for CZTS nanoparticles preparation using hexadecylamine (HDA) as a capping agent. The as-prepared CZTS powder was deposited as ink using Doctor Blade technique onto ceramic ...

    • openAccess   The Ceramic Industry in Spain: Challenges and Opportunities in Times of Crisis 

      Llop Pla, Jorge; Lyubenova, Teodora; BARRACHINA ALBERT, ESTER; Notari Abad, María Dolores; Nebot Díaz, Isaac; Carda Castelló, Juan Bautista German Ceramic Society (2014)
      In the last few years, the Spanish ceramic industry has gone through a severe crisis, which has led to great market loss and reduction in profi ts. Nevertheless, the ceramic industries in Spain have always characterise ...