Results 51 to 60 of about 318 (102)

Crystalline behaviour and electrical properties of manganese perovskites substituted on A or B sites: ErMnO₃ modified by Ca and EuMnO₃ modified by Co

Boletín de la Sociedad Española de Cerámica y Vidrio, 2010
The structural and electrical features of the manganites solid solutions (Er,Ca)MnO₃ and Eu(Co,Mn)O₃, have been studied by X-ray diffraction and conductivity measurements. Powders were prepared by solid-state
Tartaj, J., Moure, A., Peña, O., Moure, C.   +3 more
doaj  

Preparação de intermetálicos e manganitas para aplicações do efeito magnetocalórico

, 2013
Em 1881 E. Warburg observou o efeito causado ao aplicar um campo magnético externo em uma amostra de ferro (Fe), observando que a temperatura do material se altera devido à aplicação do campo.
Caraballo Vivas, Richard Javier
core   +1 more source

Caracterización y automatización de un electroimán según Weiss para la medida de la magnetorresistencia en manganitas LSMO [PDF]

, 2008
En este proyecto se implementó un sistema de generación de campo magnético utilizando un electroimán según Weiss, cuyo campo magnético esta relacionado con la corriente con la cual se alimenta y la longitud del entrehierro entre sus polos.
Obando Bravo, German Darío, Torres Nupan, Luis Carlos   +1 more
core   +1 more source

Crystalline structure and electrical properties of solid solutions YNi_xMn_1-xO₃

Boletín de la Sociedad Española de Cerámica y Vidrio, 1999
Solid solutions belonging to the Mn-rich region of the YNiXMn1-XO3 system have been studied. The powders were prepared by solid state reaction between the corresponding oxides. Sintered ceramics were obtained by firing at 1325-1350ºC.
Moure, C., Durán, P., Fernández, J. F., Gutiérrez, D.   +3 more
doaj  

Estructura cristalina y propiedades eléctricas de soluciones sólidas YCu_xMn_1-xO₃

Boletín de la Sociedad Española de Cerámica y Vidrio, 2001
Solid solutions belonging to the Mn-rich region of the YCuxMn1-xO3 system have been studied. The powders were prepared by solid-state reaction between the corresponding oxides. Sintered ceramics were obtained by firing at 1100−1200 ºC.
Peña, O., Fernández, J. F., Moure, C., Gutiérrez, D.   +3 more
doaj  

Estabilidad térmica de manganitas tipo La1-xCaxMnO3 obtenidas mediante mecanosíntesis

, 2009
"En este trabajo se evalúa la estabilidad térmica de manganitas de lantano dopadas con calcio del tipo La1-xCaxMnO3. La síntesis se llevó a cabo mediante molienda mecánica de alta energía, utilizando mezclas estequiométricas de óxidos metálicos La2O3, CaO y Mn2O3 como precursores, variando x desde 0 hasta 1, en intervalos de 0.1. El equipo empleado fue
I. A. Lira Hernández, A.M. Bolarín Miró, F. Sánchez De Jesús, C.A. Cortés Escobedo   +3 more
openaire   +3 more sources

Síntese de pós de LaMnO3 e LaCrO3 dopados com Sr pelo método de combustão: caracterização estrutural e avaliação termodinâmica Synthesis of Sr-doped LaMnO3 and LaCrO3 powders by combustion method: structural characterization and thermodynamic evaluation

Cerâmica, 2012
Manganita de lantânio dopada com estrôncio (LSM) e cromita (LSC) em pó, bem como as correspondentes amostras não dopadas, foram sintetizadas pelo método de combustão, usando dois diferentes combustíveis (ureia e glicina).
A. L. A. da Silva, L. da Conceição, A. M. Rocco, M. M. V. M. Souza   +3 more
doaj  

Estructura cristalina y propiedades de la solución sólida YCo_XMn_1-XO₃

Boletín de la Sociedad Española de Cerámica y Vidrio, 2002
Solid solutions corresponding to the YCoXMn1-XO3 system, x=0.2...0.7 have been studied. The powders were prepared by solid state reaction of the corresponding oxides. Sintered bodies were obtained by firing between 1250 and 1350ºC.
Moure, C., Fernández, J. F., Pena, O., Gutiérrez, D.   +3 more
doaj  

Utjecaj reaktanata na pripremu manganita reakcijom u čvrstom stanju

, 2021
The purpose of this work was to synthesize compounds of strontium manganite (SrMnO3), lanthanum manganite (LaMnO3), and barium manganite (BaMnO3) by solid-state reaction using two structurally distinct manganese (IV) oxides and therefore examine the influence of reactants on the synthesis. The obtained products were calcined at temperatures of 1000 and
openaire   +2 more sources

A note on the different crystalline features of the EuMnO₃-based solid solutions as a function of the modifying cation nature

Boletín de la Sociedad Española de Cerámica y Vidrio, 2010
The structural properties of solid solutions based on EuMnO3, in which Eu has been substituted by divalent Ca2+ and Mn by the divalent cation Ni2+ or the variable valence cation Co2+-Co3+ have been studied by X-ray diffraction (XRD) and X-ray absorption ...
Peña, O., Tartaj, J., Moure, A., Moure, C.   +3 more
doaj