• Aucun résultat trouvé

Preparation, structural and functional propertiesof PbTiO3-? ceramics

N/A
N/A
Info
Télécharger
Protected

Academic year: 2021

Partager "Preparation, structural and functional propertiesof PbTiO3-? ceramics"

Copied!
1
0
0

Chargement.... (Voir le texte intégral maintenant)

Texte intégral

(1)

Ceramics International

Volume 45, Issue 7, 2019, Pages 9043-9047

Preparation, structural and functional properties of PbTiO3-? ceramics

Khiat Abd elmadjid, Felicia Gheorghiu, Mokhtar Zerdali, Mohammed Kadri, Saad Hamzaoui

Abstract: In the present study, oxygen deficient PbTiO3-? ceramics were prepared by solid state-reaction method. The formation of the pure perovskite phase with tetragonal structure was confirmed for the 800 °C/2 h calcined sample by using X-ray diffraction analysis at room temperature. Energy dispersive X-ray spectroscopy analyses confirm the creation of oxygen vacancies in the system for charge compensations, as demonstrated by the percentage of O atoms of ?53%. The complex impedance data reveals important contributions of the oxygen vacancies to the total dielectric response that are homogeneous distributed within the sample.

The room temperature magnetic properties show a weak ferromagnetic character in all the samples that might be attributed to the oxygen vacancies defects and to surface effects.

Keywords : Ceramics, oxygen vacancies, EDX spectra, Dielectric properties, Magnetic Properties

Centre de Recherche en Technologies Industrielles - CRTI - www.crti.dz

Powered by TCPDF (www.tcpdf.org)

Références

Télécharger maintenant ( PDF - 1 Page - 7.67 KB )

Documents relatifs

The impedance response of rotating disk electrodes

The enhanced frequency dispersion associated with coupled charging and faradaic currents is seen by examination of the global interfacial impedance for the APS and NAPS cases, shown

INTRODUCTION The Bergman projections are some of the most important operators acting on the spaces of analytic functions over domains of the complex plane

It remains an open problem to find the exact value of kP ∗ k and, in view of the proof of Theorem 7, we believe that it is equivalent to the following extremal problem.. We are

Structural and dielectric study of the Na0.5Bi0.5TiO3–PbTiO3 and K0.5Bi0.5TiO3–PbTiO3 systems

The limits of the rhombohedral (Na 0.5 Bi 0.5 TiO 3 -rich side) and tetragonal (PbTiO 3 -rich side) solid solutions have been determined, as well as the evolution of

The most important ones are:!

Again I ask you questions to each of which your answer is yes or no, again you are allowed to give at most one wrong answer, but now I want to be able to know which card you

The Complex Response of Monetary Policy to the Exchange Rate

The importance of the exchange rate to monetary policy is reflected in large academic and policy-related literatures on the topic. We contribute to this literature by addressing

Titre : RESILIENCE DES BAKA FACE AUX MUTATIONS SOCIO ENVIRONNEMENTALES (CAMEROUN)

propriété des Bantous où ils mènent leurs activités agricoles au détriment des pygmées Baka. Les Baka sont alors obligés de travailler pour les Badjoué afin d’assurer la survie

THE DIELECTRIC RESPONSE OF CRYSTALS

In considering the low frequency dielectric response of a crystal, care must be taken in the treatment of the fluctuations in the phonon density to which the light couples

We prove that the equations, the Hamiltonians, and the bracket are weighted- homogeneous polynomials in the derivatives of the dependent vari- ables with respect to the space variable

Of course, we cannot say anything about weak quasi-Miura transfor- mations, since it is even not clear in which class of functions we have to look for its deformations, but we still