Directionally solidified Ni doped MgO-MgSZ eutectic composites for thermophotovoltaic devices

Sola, D. ; Oliete, P.B. (Universidad de Zaragoza) ; Peña, J. I. (Universidad de Zaragoza) ; Merino, R.I. (Universidad de Zaragoza)

Resumen: 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.

Idioma: Inglés

DOI: 10.1016/j.jeurceramsoc.2018.12.032

Año: 2019

Publicado en: Journal of the European Ceramic Society 39, 4 (2019), 1206-1213
ISSN: 0955-2219

Factor impacto JCR: 4.495 (2019)

Categ. JCR: MATERIALS SCIENCE, CERAMICS rank: 1 / 28 = 0.036 (2019) - Q1 - T1

Factor impacto SCIMAGO: 1.164 - Materials Chemistry (Q1) - Ceramics and Composites (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2013-41045-R-EMITEME
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT-2016-77769R-FLASCERAMAT

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)