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Etude De Lemission Electronique Par Les Ferroelectriques
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Book Synopsis ETUDE DE L'EMISSION ELECTRONIQUE PAR LES FERROELECTRIQUES by : HALIM.. ABOURA
Download or read book ETUDE DE L'EMISSION ELECTRONIQUE PAR LES FERROELECTRIQUES written by HALIM.. ABOURA and published by . This book was released on 1996 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES ETUDES DE L'EMISSION ELECTRONIQUE PAR LES MATERIAUX FERROELECTRIQUES ONT PRIS DE L'IMPORTANCE CES DERNIERES ANNEES. CETTE EMISSION ELECTRONIQUE PRESENTE UN CARACTERE TRES DIFFERENT DES SOURCES D'ELECTRONS CONNUES ACTUELLEMENT. LES RESULTATS DES PREMIERES ETUDES EFFECTUEES AU LABORATOIRE SUR L'EMISSION ELECTRONIQUE PAR LES CRISTAUX FERROELECTRIQUES NOUS ONT AMENE A PRESENTER UN MODELE D'EMISSION BASE SUR LA VARIATION OU L'INVERSION DE LA POLARISATION ELECTRIQUE SPONTANEE. NOUS NOUS SOMMES INTERESSES A L'ETUDE DE L'EMISSION ELECTRONIQUE PAR LES MATERIAUX FERROELECTRIQUES - PLACES DANS UNE ENCEINTE A VIDE - SOUMIS A DES CHAMPS VARIABLES ET A DES GRADIENTS DE TEMPERATURES, ET CECI POUR LES CERAMIQUES DE PLZT 5,1/65/35 ET 10,4/64/36 ET DE (BA,PB)TIO#3 AINSI QUE LES MONOCRISTAUX DE BATIO#3 ET DU TAAP. LES RESULTATS ONT MONTRE QUE L'EMISSION D'ELECTRONS DANS LA PHASE FERROELECTRIQUE EST PRODUITE PAR L'INVERSION DE LA POLARISATION SPONTANEE POUR TOUT ECHANTILLON ETUDIE. L'EMISSION CROIT POUR LES CERAMIQUES DE PLZT-5,1/65/35 ET DECROIT POUR LES PLZT-10,4/64/36 DANS LEUR REGION DE TRANSITION DE PHASE DIFFUSE. LES RESULTATS OBTENUS POUR UNE CERAMIQUE DE (BA,PB)TIO#3 SONT SIMILAIRES A CEUX DU PLZT-5,1/65/35. CES DEUX ECHANTILLONS ONT DES STRUCTURES GRANULAIRES TRES PROCHES. L'EMISSION ELECTRONIQUE AU DELA DE LA TEMPERATURE CORRESPONDANT AU MAXIMUM DE LA COURBE C(T) PEUT ETRE EXPLIQUEE PAR LA ZONE DE TRANSITION DIFFUSE DE CES CERAMIQUES OU SUBSISTENT DES REGIONS FERROELECTRIQUES. L'EMISSION D'ELECTRONS PAR LES MONOCRISTAUX DE BATIO#3 EST INFLUENCEE PAR LE TYPE D'ELECTRODES UTILISEES. L'EMISSION CROISSANTE AU DELA DE T#C, DANS LE CAS D'UNE ELECTRODE AJOUREE, EST EXPLIQUEE PAR UNE COUCHE DE SURFACE QUI SERAIT DUE A UNE DIFFUSION EN SURFACE DU METAL DE L'ELECTRODE. LES RESULTATS OBTENUS SUR LES ECHANTILLONS DE TAAP DIFFERENT SELON LA VALEUR DU CHAMP INTERNE
Book Synopsis CONTRIBUTION A L'ETUDE DE L'EMISSION ELECTRONIQUE PAR LES FERROELECTRIQUE by : SID-AHMED FETHI.. LIATENI
Download or read book CONTRIBUTION A L'ETUDE DE L'EMISSION ELECTRONIQUE PAR LES FERROELECTRIQUE written by SID-AHMED FETHI.. LIATENI and published by . This book was released on 1997 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ETUDE DE L'EMISSION ELECTRONIQUE PAR LES MATERIAUX FERROELECTRIQUES EST EFFECTUEE EN APPLIQUANT DES CHAMPS ELECTRIQUES ENTRE LA SURFACE EMISSIVE ET LA SURFACE OPPOSEE DU FERROELECTRIQUE. ELLE A ETE MENEE SUR DES CRISTAUX DE TGS DONT L'EPAISSEUR VARIE DE 1 MM A 35 M ET DES CERAMIQUES DE PZT D'EPAISSEUR ALLANT DE 150 M A 2 M. L'ETUDE DE LA CORRELATION TEMPORELLE ENTRE L'EMISSION ELECTRONIQUE ET LA TENSION APPLIQUEE A PERMIS DE CONFIRMER LE MODELE AFFIRMANT QUE L'EMISSION ELECTRONIQUE SURVIENT PRINCIPALEMENT A LA SUITE DE L'INVERSION DE LA POLARISATION AMENANT LES CHARGES NEGATIVES DE POLARISATION SUR LA SURFACE EMISSIVE. DANS LE CAS DE L'EMISSION A PARTIR DES COUCHES MINCES FERROELECTRIQUE OUTRE L'EMISSION PRECEDANTE NOUS AVONS MIS EN EVIDENCE UNE EMISSION QUI SERAIT DUE A LA CONTRIBUTION DIELECTRIQUE. CETTE EMISSION EST D'AUTANT PLUS IMPORTANTE QUE L'EPAISSEUR DU FERROELECTRIQUE EST FAIBLE. UNE VARIATION DE LA VALEUR DU CHAMP SEUIL D'EMISSION EN FONCTION DE L'EPAISSEUR DU FERROELECTRIQUE A ETE MISE EN EVIDENCE. LA VARIATION DE L'EMISSION ELECTRONIQUE EN HAUTE INTENSITE EN FONCTION DE L'EPAISSEUR DES ECHANTILLONS FERROELECTRIQUES, LA GEOMETRIE DES ELECTRODES, LA TENSION D'ACCELERATION ET LA PRESSION DU VIDE A ETE ETUDIEE. UNE INTERPRETATION DES RESULTATS FAISANT INTERVENIR L'EVOLUTION DES DOMAINES FERROELECTRIQUES, L'EPAISSEUR DES ECHANTILLONS AINSI QUE LA GEOMETRIE DES ELECTRODES EST PRESENTEE. LES MECANISMES DE L'EMISSION ELECTRONIQUE A FAIBLE ET HAUTE INTENSITE SONT DISCUTES.
Book Synopsis Étude de matériaux pour l'émission d'électrons par effet de champ électrique sur cathode froide by : Francis MULLER
Download or read book Étude de matériaux pour l'émission d'électrons par effet de champ électrique sur cathode froide written by Francis MULLER and published by . This book was released on 1986 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Etude de l'émission électronique de matériaux de contact, en fonction de leur nature et de leur température by : Denis AVINAIN
Download or read book Etude de l'émission électronique de matériaux de contact, en fonction de leur nature et de leur température written by Denis AVINAIN and published by . This book was released on 1990 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Etude théorique de l'émission électronique d'une cathode en présence d'ions lents by : Thierry Josso
Download or read book Etude théorique de l'émission électronique d'une cathode en présence d'ions lents written by Thierry Josso and published by . This book was released on 1997 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS AVONS ETUDIE LE PHENOMENE D'EMISSION ELECTRONIQUE D'UNE CATHODE EN PRESENCE D'IONS POSITIFS LENTEMENT INCIDENTS SUR LA SURFACE METALLIQUE. NOUS AVONS DEVELOPPE UN MODELE THEORIQUE POUR DETERMINER LA PROBABILITE DE PASSAGE D'UN ELECTRON VENANT D'UN METAL A TRAVERS UNE BARRIERE DE POTENTIEL TRIDIMENSIONNELLE FORMEE PAR UN CHAMP ELECTRIQUE EXTERIEUR ET LES DIVERSES INTERACTIONS ION-SURFACE. UNE PREMIERE METHODE MONODIMENSIONNELLE APPROCHEE MONTRE DE FACON QUALITATIVE L'EFFET D'AMPLIFICATION PAR LES IONS DU COURANT ELECTRONIQUE EMIS PAR LA CATHODE. UNE DEUXIEME METHODE TRIDIMENSIONNELLE UTILISANT UNE BASE D'ELEMENTS FINIS A PERMIS D'EVALUER DE FACON QUANTITATIVE L'INFLUENCE DE CES IONS. D'UNE FACON GENERALE, DEUX PROCESSUS D'AMPLIFICATION ONT ETE MIS EN EVIDENCE: UN PROCESSUS RESONANT DE PASSAGE DE L'ELECTRON PAR UN ETAT QUASI LIE DE L'ION ET UN PROCESSUS NON RESONANT INDUIT PAR LA DEFORMATION DE LA BARRIERE DE POTENTIEL
Book Synopsis Contribution à l'étude de l'émission électronique sous impact d'électrons de basse énergie ( by : Julien Roupie
Download or read book Contribution à l'étude de l'émission électronique sous impact d'électrons de basse énergie ( written by Julien Roupie and published by . This book was released on 2013 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le phénomène d’émission électronique sous impact d’électrons, bien que très étudié, est mal connue à très basse énergie (
Download or read book Index bibliographique du vide written by and published by . This book was released on 1969 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Frozen Food Science and Technology by : Judith A. Evans
Download or read book Frozen Food Science and Technology written by Judith A. Evans and published by John Wiley & Sons. This book was released on 2009-01-21 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive source of information on freezing and frozen storage of food. Initial chapters describe the freezing process and provide a fundamental understanding of the thermal and physical processes that occur during freezing. Experts in each stage of the frozen cold chain provide, within dedicated chapters, guidelines and advice on how to freeze food and maintain its quality during storage, transport, retail display and in the home. Individual chapters deal with specific aspects of freezing relevant to the main food commodities: meat, fish, fruit and vegetables. Legislation and new freezing processes are also covered. Frozen Food Science and Technology offers in-depth knowledge of current and emerging refrigeration technologies along the entire frozen food chain, enabling readers to optimise the quality of frozen food products. It is aimed at food scientists, technologists and engineers within the frozen food industry; frozen food retailers; and researchers and students of food science and technology.
Download or read book Électro Magazine written by and published by . This book was released on 1953 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physique written by and published by . This book was released on 1970 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Doru Constantin Lupascu Publisher :Springer Science & Business Media ISBN 13 :3662071894 Total Pages :238 pages Book Rating :4.6/5 (62 download)
Book Synopsis Fatigue in Ferroelectric Ceramics and Related Issues by : Doru Constantin Lupascu
Download or read book Fatigue in Ferroelectric Ceramics and Related Issues written by Doru Constantin Lupascu and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major barrier to the introduction of ferroelectric devices into mass markets remains their limited reliability due to fatigue. The underlying physical and chemical mechanisms of this material fatigue phenomenon are extremely complex, and the relevant influences range from single-point defects to macroscopic boundary conditions. This book summarizes the different aspects of fatigue in ferroelectrics. It is primarily concerned with bulk material effects. Mechanical, electrical, and physico-chemical processes are described; reference data are given for different loading regimes and boundary conditions; and various fatigue models are compared. The monograph also demonstrates how the results of acoustic emission and of microscopy studies reveal the microscopic origins of fatigue in ferroelectric devices.
Download or read book Electron Microscopy written by and published by . This book was released on 1970 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scanning Electron Microscopy written by and published by . This book was released on 1981 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1968-77 include the proceedings of the annual Scanning Electron Microscope Symposium, sponsored by the IIT Research Institute, and other workshops.
Download or read book Journal de physique written by and published by . This book was released on 1972 with total page 1270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multifunctional Oxide Heterostructures by : Evgeny Y. Tsymbal
Download or read book Multifunctional Oxide Heterostructures written by Evgeny Y. Tsymbal and published by OUP Oxford. This book was released on 2012-08-30 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the rapidly developing field of oxide thin-films and heterostructures. Oxide materials combined with atomic-scale precision in a heterostructure exhibit an abundance of macroscopic physical properties involving the strong coupling between the electronic, spin, and structural degrees of freedom, and the interplay between magnetism, ferroelectricity, and conductivity. Recent advances in thin-film deposition and characterization techniques made possible the experimental realization of such oxide heterostructures, promising novel functionalities and device concepts. The book consists of chapters on some of the key innovations in the field over recent years, including strongly correlated oxide heterostructures, magnetoelectric coupling and multiferroic materials, thermoelectric phenomena, and two-dimensional electron gases at oxide interfaces. The book covers the core principles, describes experimental approaches to fabricate and characterize oxide heterostructures, demonstrates new functional properties of these materials, and provides an overview of novel applications.
Author :Reinhard Krause-Rehberg Publisher :Springer Science & Business Media ISBN 13 :9783540643715 Total Pages :408 pages Book Rating :4.6/5 (437 download)
Book Synopsis Positron Annihilation in Semiconductors by : Reinhard Krause-Rehberg
Download or read book Positron Annihilation in Semiconductors written by Reinhard Krause-Rehberg and published by Springer Science & Business Media. This book was released on 1999 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book reports on recent investigations of lattice imperfections in semiconductors by means of positron annihilation. It reviews positron techniques, and describes the application of these techniques to various kinds of defects, such as vacancies, impurity vacancy complexes and dislocations.
Book Synopsis Frontiers in Materials Processing, Applications, Research and Technology by : M. Muruganant
Download or read book Frontiers in Materials Processing, Applications, Research and Technology written by M. Muruganant and published by Springer. This book was released on 2017-11-13 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises the select proceedings of FiMPART 2015. The volume covers advances in major areas of materials research under one umbrella. This volume covers all aspects of materials research, processing, fabrication, structure/property evaluation, applications of ferrous, non-ferrous, ceramic, polymeric materials and composites including biomaterials, materials for energy, fuel cells/hydrogen storage technologies, batteries, super-capacitors, nano-materials for energy and structural applications, aerospace structural metallic materials, bulk metallic glasses and other advanced materials. The book will be useful to researchers, students, and professional working in areas related to materials innovation and applications.
