97105 20201215135311.0 doi 10.1016/j.jeurceramsoc.2018.12.032 sideral 109595 ART-2019-109595 eng (orcid)0000-0002-5998-2251 Sola, D. Directionally solidified Ni doped MgO-MgSZ eutectic composites for thermophotovoltaic devices 2019 Access copy available to the general public Unrestricted Ni-doped MgO-MgSZ eutectic composites were investigated as selective emitters for thermophotovoltaic devices. MgO-MgSZ:Ni eutectic rods were directionally solidified at 25 and 500 mm/h using the laser floating zone technique. Microstructure was strongly dependent on the growth rate, the size of the eutectic phases decreased as the growth rate increased. A hardness of ~11 GPa and a fracture toughness of ~1.6 MPa were obtained from indentation techniques, not showing dependence on the growth rate. Flexure strength increased from ~400 MPa in samples grown at 25 mm/h up to ~1 GPa for those solidified at 500 mm/h, which was attributed to the decrease of the phase size. Thermal emission of eutectic composites was studied up to 1400 °C. An intense broad emission band centred in 1.5 µm matching with the sensitive region of the GaSb photoconverter was found. The selective emission was ascribed to the de-excitation of the thermally excited Ni2+ ions. info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2013-41045-R-EMITEME info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT-2016-77769R-FLASCERAMAT info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.495 2019 MATERIALS SCIENCE, CERAMICS 1 / 28 = 0.036 2019 Q1 T1 1.164 2019 Materials Chemistry 2019 Q1 Ceramics and Composites 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0003-3480-398X Oliete, P.B. Universidad de Zaragoza (orcid)0000-0003-2242-6822 Peña, J. I. Universidad de Zaragoza (orcid)0000-0003-0747-405X Merino, R.I. Universidad de Zaragoza 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 39, 4 (2019), 1206-1213 J. Eur. Ceram. Soc. Journal of the European Ceramic Society 0955-2219 1722537 http://zaguan.unizar.es/record/97105/files/texto_completo.pdf Postprint 268248 http://zaguan.unizar.es/record/97105/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:97105 articulos driver 2020-12-15-12:27:56 ARTICLE