944 resultados para RAZON Y FE


Relevância:

40.00% 40.00%

Publicador:

Resumo:

With XRD, R-T, and ac chi measurements a comparative study on the doping effects of 3d elements in Bi(1.5)Pb(0.2)Sr(2)Ca(2)Cu(2.8)M(0.2)O(y) (M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, or Zn) has been carried out. The effects of the former five members are significantly different, both on phase formed and on T-c, from the latter four. It seems that the effect on phase stabilization correlates with the valency of the doped cation. In connection with the instability of the 2223 phase, the correlation has been discussed.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Three series of samples LaMnyCo1-yO3+/-lambda, LaFeyMn1-yO3+/-lambda, and LaFeyCo1-yO3+/-lambda (y = 0.0 to 1.0) with Perovskite structure were prepared by an explosion method different from the generally used ceramic techniques. The variation of crystal

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Tesis ( Maestro en Ciencias en Producción Agrícola) U.A.N.L.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Tesis (Maestro en Ciencias de la Ingeniería Mecánica con Especialidad en Materiales) U.A.N.L.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Tesis (Maestría en Ciencias de la Ingeniería Mecánica con Especialidad en Materiales) UANL, 2010.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Tesis (Maestría en Ciencias de la Ingeniería Mecánica con Especialidad en Materiales) UANL, 2010.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Tesis (Maestría en Ciencias con orientación en Química de los Materiales) UANL, 2014.