Results 101 to 110 of about 1,911 (147)

Interacciones cuadripolares en SrZrO₃

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
The SrMO3 compounds with M = Ru, Zr ó Hf display similar structures. They are orthorhombic at room temperature (RT) and transform into tetragonal (I4/mcm) and cubic (Pm3 – m) at higher temperatures.
Alonso, R. E., López-García, A.
doaj  

Caracterización dieléctrica de la perovskita laminar La_1.5Sr_0.5CoO₄

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
In this work, the behaviour of the real and imaginary components of the dielectric permittivity of layered perovskite La1.5Sr0.5CoO4 have been studied, in the frequency range 20 Hz-1 MHz and in the temperature range 115-350 K.
Rivas, J., Señarís-Rodríguez, M. A., Rivas-Murias, B., Gutiérrez, M. P.   +3 more
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La temperatura de transición en Sr_xBa_1-xHfO₃

Boletín de la Sociedad Española de Cerámica y Vidrio, 2002
In this contribution the transition temperature TC to the cubic phase in SrxBa1-xHfO3 compounds with x = 0.12, 0.25, 0.50, 0.75 and 0.88 is presented. These temperatures were deduced from the measurements of the perturbed angular correlation on tantalum ...
López-García, A., Horowitz, C., Alonso, R. E.   +2 more
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PROPRIEDADES ÓPTICAS EM NANOMATERIAIS DE PEROVSKITA

Anais do Congresso de Iniciação Científica da Unicamp, 2017
Jaqueline de Oliveira Rocha, Lazaro Aurelio Padilha Junior   +1 more
openaire   +2 more sources

Mn-substituted perovskites RECo_xMn_1-xO₃: a comparison between magnetic properties of LaCo_xMn_1-xO₃ and GdCo_xMn_1-xO₃

Boletín de la Sociedad Española de Cerámica y Vidrio, 2008
Cooperative phenomena constitute important mechanisms to explain the magnetic properties of the perovskite manganites REMnO3, in which the rare-earth and/or Mn is partially replaced by divalent elements. In this way, the manganese ion changes its valence
Barahona, P., Gil, V., Moure, C., Pecchi, G., Campos, C., Peña, O.   +5 more
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Dry reforming of methane with La1-XAXNiO3 and LaNi1-XBXO3 (A: Ce or Pr and B: Co or Mg) perovskites as catalysts precursors [PDF]

, 2010
: Perovskite-type LaNiO3 was synthesized by four different methods: autocombustion, sol-gel, calcination of nitrate and freeze-drying. The catalyst that presented the highest activity in terms of conversion of CH4 and CO2 to H2/CO was obtained from ...
Barrault, Joël, Batiot Dupeyrat, Catherine, Daza, Carlos Enrique, Gallego Marín, Jaime Andrés, Molina, Rafael A., Mondragón Pérez, Fanor, Sierra Gallego, Germán Alberto   +6 more
core  

Magnetic properties of manganese-site substituted Y(Cu,Mn)O₃

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
The magnetic properties of the solid solution YCuxMn1-xO3 have been investigated in the whole range of possible substitutions 0.30 ≤ x(Cu) ≤ 0.50. The χa.c.
Durán, P., Moure, C., Gutiérrez, D., Peña, O.   +3 more
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La transición de fase I4/mcm→Pm3m en Sr_0.5Ba_0.5HfO_3-δ

Boletín de la Sociedad Española de Cerámica y Vidrio, 2001
The effect of partial substitution of cations in AMO3 compounds have been studied because the physical properties and applications of these materials can be improved. In particular we are interested in the Sr1-xBaxHfO3 family.
Lamas, D., Alonso, R. E., Horowitz, C., López-García, A., Caneiro, A.   +4 more
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Spin reversal in Gd(Me,Mn)O₃ (Me = Co, Ni)

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
Partial substitution of the rare-earth by calcium at the cationic site of the ABO3 perovskites may show extraordinary effects of spin reversal due to a negative polarization between the rare-earth and the manganese networks, as it occurs in the solid ...
Gutiérrez, D., Moure, C., Ghanimi, K., Peña, O., Durán, P.   +4 more
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Impact of Ni/Co in perovskites as catalysts for syngas production via methane reforming with CO2 [PDF]

Se sintetizaron óxidos mixtos tipo perovskitas en capas An+1BnX3n+1 (A = Sr/Ba; B = Co/Ni; X = O) mediante combustión en solución (SCS) asistida por radiación de microondas.
Fereira, Carla, Guerrero, Maryuri, Lugo, Claudio, Petit, Eliel, Pérez, Patricia, Rondón, Jairo, Torres, Ruben   +6 more
core   +1 more source