Published 1989 | Version v1
Journal article Metadata-only

Influence of various parameters on the elaboration of superconducting oxides

Creators

  • 1. Aix-Marseille-1 Univ., 13 - Marseille (France)
  • 2. Aix-Marseille-3 Univ., 13 - Marseille (France)

Description

Several oxides able to give rise to a high Tc superconductivity have been studied. Samples were prepared in both series: La(Ba2-xLax) Cu3O7+y and YBa2 (Cu3-xAgx)O7-y. The evolution of the resistance versus the composition has been studied on sintered samples. The results assess the importance of the experimental conditions of the synthesis. In the system La(Ba2-xLax)Cu3O7+y our results complete the work of Segre et al. and precise composition at which the superconductivity transition disappear for the profit of the semiconductive behaviour. The samples YBa2(Cu3-xAgx)O7-y has for x = 0 electrical properties very dependent of the thermal treatment. Some characteristic data are shown. The partial substitution of Cu by Ag for x ≥ 1 enables to keep the superconducting behaviour

Abstract (French)

Quelques oxydes susceptibles de presenter la supraconductivite a temperature critique elevee ont ete etudies. En particulier, des echantillons ont ete prepares dans deux series: La(Ba2-xLax)Cu3O7+y et YBa2(Cu3-xAgx)O7-y. La variation de la resistance electrique en fonction de la composition a ete etudiee sur des pastilles frittees. Les resultats obtenus mettent en evidence l'importance des conditions experimentales de synthese. Dans le systeme La(Ba2-xLax)Cu3O7+y nos resultats completent le travail de Segre et al., en precisant la composition pour laquelle la transition supraconductrice disparait au profit du comportement semiconducteur. Les echantillons de composition YBa2(Cu3-xAgx)O7-y presentent, pour x = 0, un comportement electrique etroitement dependant du traitement thermique. Quelques courbes caracteristiques sont donnees. La substitution partielle du cuivre par l'argent pour x ≥ 1 permet de conserver le caractere supraconducteur

Additional details

Additional titles

Original title (French)
Influence de divers parametres sur la synthese d'oxydes supraconducteurs

Publishing Information

Journal Title
Revue Internationale des Hautes Temperatures et des Refractaires
Journal Volume
25
Journal Issue
1
Series
Rev. Int. Hautes Temp. Refract.
Journal Page Range
29-35
ISSN
0035-3434
CODEN
RIHTA

Conference

Title
Day on Superconducting oxides at high T_c.
Original Conference Title
Journee Supraconducteurs oxydes a T/sub c/ elevee
Dates
23 Oct 1987.
Place
Orleans (France).

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
21082474
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BARIUM OXIDES; CHEMICAL COMPOSITION; COPPER OXIDES; HEAT TREATMENTS; LANTHANUM OXIDES; SILVER OXIDES; SUPERCONDUCTIVITY; SYNTHESIS; TEMPERATURE DEPENDENCE; YTTRIUM OXIDES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; LANTHANUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SILVER COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS