Consulting company 

in Materials Science and Technology


Who we are


As a start-up belonging to the Scientific Park of Autonomous University of Barcelona, the company is based on the strong expertise of our team, formed by a group of material scientists with more than 20 years of experience able to fulfil your demands.

Ceramic, metal or polymer materials can be explored by using up-to-date information tools and critical analysis in tight collaboration with our customers.

We cover technological surveillance, materials and process optimization, advanced characterization, problem solving, market intelligence and, generally, any type of R+D and innovation topics related to materials science.

Our extensive network of partners help us with pilot and manufacture operations if needed.


Team experience:

Our team has experience developing services on R+D for different companies such as 


Team's patents as inventors:














Preparation of GdBa2Cu3O6+ x (GdBCO) precursor powder by spray-drying a nitrate solution containing PEG, J Camps Soler, J Farjas Silva, P Roura Grabulosa, A Calleja, International Journal of Applied Ceramic Technology, 2020, vol. 17, núm. 4.                


Preparation of GdBa2Cu3O6+x (GdBCO) precursor powder by spray‐drying a nitrate solution containing PEG J Camps, J Farjas, P Roura‐Grabulosa, A Calleja

International Journal of Applied Ceramic Technology, 2020,17 (4), 1752-1760                   


Low temperature processing of solution-derived ceria deposits on flat surfaces of 3D-printed polyamide

S Morales-Planas, A Calleja, VR Vlad, J Oró-Solé, J Minguella-Canela, .Thin Solid Films 685, 75-80                               2019


Towards oxide electronics: a roadmap

M Coll, J Fontcuberta, M Althammer, M Bibes, H Boschker, A Calleja, ...

Applied surface science, 2019, 482, 1-93                              


Status of the European Union project FASTGRID

P Tixador, M Bauer, CE Bruzek, A Calleja, G Deutscher, B Dutoit, ...

IEEE Transactions on Applied Superconductivity, 2019, 29 (5), 1-5            


Inkjet Printing Multideposited YBCO on CGO/LMO/MgO/Y2O3/Al2 O3/Hastelloy Tape for 2G-Coated Conductors

VR Vlad, E Bartolome, M Vilardell, A Calleja, A Meledin, X Obradors, ...

IEEE Transactions on Applied Superconductivity, 2018, 28 (4), 1-5            


Melting temperature of YBa2Cu3O7− x and GdBa2Cu3O7− x at subatmospheric partial pressure

F Taïr, L Carreras, J Camps, J Farjas, P Roura, A Calleja, T Puig, ...

Journal of Alloys and Compounds, 2017, 692, 787-792    


Inkjet-Printed Chemical Solution Y2O3 Layers for Planarization of Technical Substrates

M Vilardell, J Fornell, J Sort, R Vlad, JC Fernández, J Puig, A Usoskin, ...

Coatings, 2017, 7 (12), 227                          


Low AC loss inkjet-printed multifilamentary YBCO coated conductors

SC Hopkins, TB Mitchell-Williams, DRV Bussche, A Calleja, VR Vlad, ...

IEEE Transactions on Applied Superconductivity, 2016,  26 (3), 1-5           


Composite films combining electrospun fiber network and epitaxial oxide by chemical solution deposition

A Calleja, J Sort, S Ricart, X Granados, X Palmer, V Roxana Vlad, T Puig, ...

Journal of Sol-Gel Science and Technology, 2016, 80 (2), 277-284              


Solution design for low-fluorine trifluoroacetate route to YBa2Cu3O7 films

X Palmer, C Pop, H Eloussifi, B Villarejo, P Roura, J Farjas, A Calleja, ...

Superconductor Science and Technology 2015, 29 (2), 024002    


Enhanced structural and morphological properties of Gd-doped CeO2 thin films obtained by polymer-assisted deposition

RB Mos, T Petrisor Jr, M Nasui, A Calleja, T Puig, L Ciontea, T Petrisor

Materials Letters, 2014, 124, 306-309     


Inkjet printing of multifilamentary YBCO for low AC loss coated conductors

SC Hopkins, D Joseph, TB Mitchell-Williams, A Calleja, VR Vlad, ...

Journal of Physics: Conference Series, 2014,  507 (2), 022010      


Hybrid sol–gel layers containing CeO2 nanoparticles as UV-protection of plastic lenses for concentrated photovoltaics

M Aklalouch, A Calleja, X Granados, S Ricart, V Boffa, F Ricci, T Puig, ...

Solar energy materials and solar cells ,2014,120, 175-182           


Magnetic and structural characterization of inkjet-printed TFAYBa2Cu3O7− x/MODCZO/ABADYSZ/SS coated conductors

E Bartolomé, VR Vlad, A Calleja, M Aklalouch, R Guzmán, J Arbiol, ...

Superconductor Science and Technology. 2013,  26 (12), 125004               


Functional oxide nanostructures written by EBL on insulating single crystal substrates

J Malowney, N Mestres, X Borrise, A Calleja, R Guzman, J Llobet, J Arbiol, ...

Microelectronic engineering. 2013,  110, 94-99  


Patterning of Functional Ceramic Oxides on Metallic Substrates by Inkjet Printing

M Vilardell, X Granados, S Ricart, A Calleja, A Palau, T Puig, X Obradors

NIP & Digital Fabrication Conference, 2013 (2), 503-507                                


Corrosion induced degradation of textured YBCO under operation in high humidity conditions

JJ Roa, E Jiménez-Piqué, J Díaz, M Morales, A Calleja, M Segarra

Surface and Coatings Technology , 2012, 206 (19-20), 4256-4261               


Growth of epitaxial CeO2 buffer layers by polymer assisted deposition

A Calleja, RB Mos, P Roura, J Farjas, J Arbiol, L Ciontea, X Obradors, ...

MRS Proc. , 2012, 449, 31-39                      


Synthesis of nanocrystalline ceria thin films by low-temperature thermal decomposition of Ce-propionate

P Roura, J Farjas, S Ricart, M Aklalouch, R Guzman, J Arbiol, T Puig, ...

Thin Solid Films, 2012,  520 (6), 1949-1953           


Epitaxial BaZrO 3 tracks by electrospinning of metalorganic fibers on single crystals

A Calleja, S Ricart, X Granados, X Palmer, E Solano, JA Tornero, F Cano, ...

CrystEngComm , 2012, 14 (14), 4686-4691            


High temperature transformation of electrospun BaZrO 3 nanotubes into nanoparticle chains

A Calleja, X Granados, S Ricart, J Oró, J Arbiol, N Mestres, AE Carrillo, ...

CrystEngComm , 2011, 13 (24), 7224-7230            


Cation order enhancement in Sr2FeMoO6 by water-saturated hydrogen reduction

A Calleja, XG Capdevila, M Segarra, C Frontera, F Espiell

Journal of the European Ceramic Society , 2011, 31 (1-2), 121-127            


Self-assembled multifunctional Fe/MgO nanospheres for magnetic resonance imaging and hyperthermia

C Martinez-Boubeta, L Balcells, R Cristòfol, C Sanfeliu, E Rodríguez, ...

Nanomedicine: Nanotechnology, Biology and Medicine, 2010,6 (2), 362-370     


Water determination of precursor solutions with oxidant cations by the Karl Fischer method: the YBCO-TFA case

A Calleja, S Ricart, X Palmer, RF Luccas, T Puig, X Obradors

Journal of sol-gel science and technology, 2010,  53 (2), 347-352               


High-density YSZ tapes fabricated via the multi-folding lamination process

XG Capdevila, J Folch, A Calleja, J Llorens, M Segarra, F Espiell, ...

Ceramics International, 2009, 35 (3), 1219-1226                


Structural and magnetic properties of ZnO: TM (TM: Co, Mn) nanopowders

D Rubi, A Calleja, J Arbiol, XG Capdevila, M Segarra, L Aragonès, ...

Journal of Magnetism and Magnetic Materials, 2007,316 (2), e211-e214             


Reversible ferromagnetic switching in ZnO:(Co, Mn) powders

D Rubi, J Fontcuberta, A Calleja, L Aragones, XG Capdevila, M Segarra

Physical Review B, 2007, 75 (15), 155322              


On–off magnetoresistive sensor based on screen-printed La2/3Sr1/3MnO3 manganite

D Rubi, J Fontcuberta, M Lacaba, AM González, J Baztán, A Calleja, ...

Sensors and Actuators A: Physical, 2006,  132 (1), 52-55                                             


Comparative study of the magnetic and electronic properties of Bi0. 75A0. 25MnO3 (x= 28) with A= Ca and Sr

JL García-Muñoz, C Frontera, P Beran, N Bellido, XG Capdevila, ...

Physica B: Condensed Matter, 2006, 374, 91-94                 


Comparative study of the magnetic and electronic properties of Bi 0.75 A 0.25 MnO 3Formula Not Shownwith A= Ca and Sr

JL Garc a-Mu oz, C Frontera, P Beran, N Bellido, XG Capdevila, ...

Physica. B, Condensed matter, 2006, 374, 91-94                               


Investigating ferromagnetism and charge order in Bi1-xSrxMnO3 (x< 0.3) ceramic oxides.

JL García Muñoz, C Frontera Beccaria, M Hervieu, M Giot, M Respaud, ...

Boletin de la Sociedad Española de Ceramica y Vidrio, 2006, vol. 45, num. 3 …    


Preparation of ultra-fine CuO: comparison of polymer gel methods and conventional precipitation processes

AI Fernández, A Calleja, JM Chimenos, MA Fernández, XG Capdevila, ...

Journal of sol-gel science and technology 36 (1), 11-17   


Magnetism in the low-doping regime of Bi1-xSrxMnO3 perovskites x<0.50

C Frontera, JL García-Muñoz, MAG Aranda, M Hervieu, C Ritter, A Calleja, ...

Journal of applied physics 97 (10), 10C105           


Microstructure–conductivity relationship in Gd-and Sm-doped ceria-based electrolytes prepared by the acrylamide sol–gel-related method

S Piñol, M Najib, DM Bastidas, A Calleja, XG Capdevila, M Segarra, ...

Journal of Solid State Electrochemistry, 2004,  8 (9), 650-654       


Charge and Zener polaron order in Bi0. 75Sr0. 25MnO3: a comparison with Bi0. 75Ca0. 25MnO3

C Frontera, JL Garcı́a-Muñoz, AE Carrillo, M Hervieu, A Calleja, ...

Physica B: Condensed Matter, 2004, 350 (1-3), 48-50      


Magnetism of Bi0. 75Sr0. 25MnO3 and its dependence on bismuth concentration

C Frontera, JL Garcı́a-Muñoz, AE Carrillo, M Hervieu, C Martin, A Llobet, ...

Journal of magnetism and magnetic materials, 2004,272, 1734-1735                     


Synthesis of Gd-doped BaPrO3 nanopowders

A Magrasó, A Calleja, XG Capdevila, F Espiell

Solid State Ionics, 2004,166 (3-4), 359-364         


Cerámicas magnetorresistivas. Progresos recientes: desde el entendimiento básico a las aplicaciones

J Fontcuberta, C Forniés, A Calleja, D Rubi, B Martínez, M Lacaba, ...

Boletin de la Sociedad Espanola de Ceramica y Vidrio, 2004,  43 (3), 627-633                       


Charge and Zener polaron order in 

C Frontera, JL García-Muñoz, MAG Aranda, M Hervieu, C Ritter, ...

Physical Review B, 2003,68 (13), 134408                             


Exploring the polyvinyl alcohol method for preparing cuprates and manganites

A Calleja, M Segarra, IG Serradilla, XG Capdevila, AI Fernández, ...

Journal of the European Ceramic Society, 2003,  23 (9), 1369-1373                           


Nanosized Nb-TiO2 gas sensors derived from alkoxides hydrolization

A Ruiz, A Calleja, F Espiell, A Cornet, JR Morante

IEEE sensors journal, 2003,3 (2), 189-194                           


Enhanced stability of charge-order in underdoped Bi0. 75Sr0. 25MnO3

C Frontera, JL Garcı́a-Muñoz, C Ritter, L Mañosa, XG Capdevila, ...

Solid state communications, 2003, 125 (5), 277-280        


New charge and Zener polaron ordered phase in Bi3/4Sr1/4MnO3

C Frontera, JL García-Muñoz, M Hervieu, MAG Aranda, C Ritter, ...

Phys. Rev. B, 2003,68, 0134408               


Processes for obtaining TiO2 anatase phase and their effects on the gas sensor performances

A Ruiz, G Dezanneau, A Cornet, JR Morante, A Calleja, F Espiell

Sensors For Environmental Control, 2003,  69-73                              2003


Anomalously high charge/orbital ordering temperature in Bi0.5Sr0.5MnO3

C Frontera, JL Garcia-Munoz, MAG Aranda, C Ritter, A Llobet, L Ranno, ...

Applied Physics A, 2002, 74 (1), s1787-s1789                      


Up-scaling of superconductor powders by the acrylamide polymerization method

A Calleja, X Casas, IG Serradilla, M Segarra, A Sin, P Odier, F Espiell

Physica C: Superconductivity , 2002, 372, 1115-1118       


Design, building up and testing of a 400 kVA hybrid FCL

X Granados, T Puig, X Obradors, E Mendoza, J Teva, A Calleja, ...

Physica C: Superconductivity 2002, 372, 1680-1683                          


Sol-gel synthesis of ceria-based electrolyte and perovskite-type cathodes

S Pinol, A Calleja, XG Capdevila, M Najib, F Espiell

Joep Huijsmans. Proceedings of the 5th European Solid Oxide Fuel Cell Forum, 2002, 112                             


Melt textured superconductors: Tailoring properties for current limitation

X Obradors, T Puig, X Granados, E Mendoza, J Teva, A Calleja, ...

AIP Conference Proceedings, 2002, 614 (1), 331-351                       


Synthesizing the Y-123/Y-211 composite by the PVA method

IG Serradilla, A Calleja, XG Capdevila, M Segarra, E Mendoza, J Teva, ...

Superconductor Science and Technology, 2002,  15 (4), 566                        


Influence of the Sr content on the synthesis of Hg sub (0. 8) Re sub (0. 2) Ba sub (2-x) Sr sub (x) Ca sub (2) Cu sub (3) O sub (8+ delta) at normal pressures

DM Bastidas, S Pinol, X Obradors, A Calleja, M Segarra, ...

Superconductor Science & Technology , 2001, 14 (11), 981-986                 


Influence of the Sr content on the synthesis of Hg0. 8Re0. 2Ba2-xSrxCa2Cu3O8+ δ at normal pressures

DM Bastidas, S Pinol, X Obradors, A Calleja, M Segarra

Superconductor Science and Technology, 2001,  14 (11), 981                                 


A novel thermobaric analyser: in situ measurement of gas pressure during synthesis in sealed quartz tube at high temperatures

AG Cunha, A Sin, X Granados, A Calleja, MTD Orlando, S Piñol, ...

Superconductor Science and Technology, 2000, 13 (11), 1549                     


AC response of Hg-based superconductors: Surface barrier and bulk pinning contributions

L Fabrega, A Sin, A Calleja, J Fontcuberta

Physical Review B, 2000, 61 (14), 9793                   


Processing of superconducting Y-123 bars

A Calleja, M Segarra, I Garcia, JM Chimenos, MA Fernandez, F Espiell, ...

CONFERENCE SERIES-INSTITUTE OF PHYSICS, 2000, 167, 99-102                 


Interlayer metallization and plastic deformation: two ways to improve flux pinning in Hg-based superconductors?

L Fabrega, A Sin, A Calleja, S Pinol, J Fontcuberta, D Eyidi, J Rabier

CONFERENCE SERIES-INSTITUTE OF PHYSICS , 2000, 167, 691-694                             


Effects of re-doping on superconducting properties and formation of Hg-1223 superconductors

MTD Orlando, A Sin, F Alsina, AG Cunha, N Mestres, A Calleja, S Pinol, ...

Physica C: Superconductivity, 1999,  328 (3-4), 257-269                 


Processing and superconducting properties of Hg1-xRexBa2Ca2Cu3O8+

A Sin, P Odier, AG Cunha, MTD Orlando, S Piñol, E Baggio-Saitovitch, ...

Superconductor Science and Technology, 1999,  12 (12), 1175                    


Muon spin relaxation in Re-substituted 


L Fabrega, A Calleja, A Sin, S Pinol, X Obradors, J Fontcuberta, PJC King

Physical Review B, 1999,60 (10), 7579                  


Hexaferrite particles by coprecipitation and lyophilization

A Calleja, E Tijero, B Martinez, S Pinol, F Sandiumenge, X Obradors

Journal of magnetism and magnetic materials, 1999, 196, 293-294                           


Influence of precursor oxygen stoichiometry on the formation of Hg, Re-1223 superconductors

A Sin, AG Cunha, A Calleja, MTD Orlando, FG Emmerich, ...

Superconductor Science and Technology, 1999, 12 (3), 120                          


Superfluidity and superconductivity-Muon spin relaxation in Re-substituted HgA2Can-lCunO2n+ 2+ x (A= Sr, Ba; n= 2, 3) superconductors

L Fabrega, A Calleja, A Sin, S Pinol, X Obradors, J Fontcuberta, PJC King

Physical Review-Section B-Condensed Matter, 1999,  60 (10), 7579-7584                              


Successful synthesis of Hg0. 80Re0. 20Sr2Can− 1CunO2n+ 2+ δ (n= 1, 2) by the sealed quartz tube technique

A Calleja, A Sin, L Fabrega, JL GarcíA-Mu―oz, S Pinol, J Fontcuberta, ...

Journal of materials science, 1998,  33 (22), 5359-5363                  


Pressure‐Controlled Synthesis of the Hg0.82Re0.18Ba2Ca2Cu3O8+δ Superconductor

A Sin, AG Cunha, A Calleja, MTD Orlando, FG Emmerich, ...

Advanced Materials, 1998, 10 (14), 1126-1129                   


Formation and stability of HgCaO2, a competing phase in the synthesis of Hg1− xRexBa2Ca2Cu3O8+ δ superconductor

A Sin, AG Cunha, A Calleja, MTD Orlando, FG Emmerich, ...

Physica C: Superconductivity, 1998,  306 (1-2), 34-46                      


Magnetic irreversibility and surface barriers in grain-aligned Re-doped Hg-1223

L Fabrega, B Martı́nez, J Fontcuberta, A Sin, S Pinol, X Obradors

Physica C: Superconductivity, 1998,  296 (1-2), 29-36                      


Synthesis of Hg1−XRexBa2Ca2Cu3O8+x Pure Phase at Normal Pressures

S Piñol, A Sin, A Calleja, J Fontcuberta, X Obradors

Journal of superconductivity, 1998, 11 (1), 125-126         


Formation and stability of HgCaO sub (2), a competing phase in the synthesis of Hg sub (1-x) Re sub (x) Ba sub (2) Ca sub (2) Cu sub (3) O sub (8+ delta) superconductor

A Sin, AG Cunha, A Calleja, MTD Orlando, FG Emmerich, ...

PHYS C SUPERCOND, 1998, 306 (1), 34-46                           


Screen printed La2/3Sr1/3MnO3 thick films on alumina substrates

L Durand, L Balcells i Argemí, A Calleja Lázaro, J Fontcuberta i Griñó, ...

Journal of Materials Research, 1998, vol. 13, núm. 9, p. 2623-2631                           


Hexaferrite-magnetite nanocomposite permanent magnets produced by mechanical alloying

A Calleja, X Obradors, A Roig, BR Martínez, S Pinol, F Sandiumenge

Materials science forum , 1998, 269, 943-948                     


Designing and testing of a sensor based on a magnetoresistive manganese perovskite thick film

L Balcells i Argemí, R Enrich i Sard, A Calleja Lázaro, ...

Journal of Applied Physics, 1997, vol. 81, núm. 8, p. 4298-4300                  


Designing and testing of a sensor based on a magnetoresistive manganese perovskite thick film

LL Balcells, R Enrich, A Calleja, J Fontcuberta, X Obradors

Journal of applied physics, 1997,  81 (8), 4298-4300                         


Synthesis of Hg1-yReyBa2Ca2Cu3O8+ x pure phase at normal pressures

S Pinol, A Sin, A Calleja, L Fabrega, J Fontcuberta, X Obradors, ...

APPLIED SUPERCONDUCTIVITY, 1997, VOLS 1 AND 2, 897-900                     


Manganese perovskites: thick‐film based position sensors fabrication

L Balcells, R Enrich, J Mora, A Calleja, J Fontcuberta, X Obradors

Applied physics letters, 1996,  69 (10), 1486-1488






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