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Author:
Publisher:
ISBN:
Category : Colloids
Languages : en
Pages : 518
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Book Description
Author:
Publisher:
ISBN:
Category : Colloids
Languages : en
Pages : 518
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Book Description
Author: Franck Bissuel
Publisher:
ISBN:
Category :
Languages : fr
Pages : 210
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Book Description
L'ETUDE CONCERNE LE DEPOT PAR SPIN-COATING DE COUCHES MINCES SOL-GEL, EN VUE DE LA REALISATION DE SYSTEMES ANTIREFLET. IL EST MONTRE QUE L'EPAISSEUR DU FILM EST FONCTION DE LA TEMPERATURE DE DEPOT, DE LA PRESSION PARTIELLE DES SOLVANTS, DE LEUR VITESSE D'EVAPORATION, DE LA VITESSE DE ROTATION DU SUBSTRAT ET DE LA CONCENTRATION DES SOLUTIONS. PAR CONTRE, L'INDICE DE REFRACTION RESTE CONSTANT QUELS QUE SOIENT LES VALEURS DE CES PARAMETRES. ON PEUT CONCLURE QUE LA COUCHE NE GELIFIE PAS LORS DU DEPOT MAIS LORS DU TRAITEMENT THERMIQUE. LA FAIBLE TEMPERATURE DE TRAITEMENT THERMIQUE IMPOSEE PAR LE CHOIX DES SUBSTRATS UTILISES CONDUIT A RECHERCHER D'AUTRES VOIES POUR DENSIFIER LES COUCHES. DES TECHNIQUES CHIMIQUES (PH, EVAPORATION SOUS VIDE) ET PHYSIQUES (TRAITEMENT FLASH, COMPRESSION ISOSTATIQUE) SONT ANALYSEES. LA SOLUTION REALISEE A PH = 1 ET EN HYDROLYSANT SEPAREMENT LES DIFFERENTS PRECURSEURS, SEMBLE ETRE LA MEILLEURE. BIEN QUE DELICATE A REPRODUIRE, LA TECHNIQUE DE TRAITEMENT FLASH PEUT EGALEMENT S'AVERER EFFICACE. ENFIN, UN REVETEMENT ANTIREFLET EST REALISE SUR LA BASE D'UN EMPILEMENT A TROIS COUCHES. LA PREMIERE COUCHE EST UN AGENT DE COUPLAGE: LE CHLORURE METACRYLIQUE DE CHROME. SUR CETTE COUCHE EST DEPOSEE UNE COUCHE D'OXYDE DE TITANE EN REALISANT L'HYDROLYSE D'UN ALCOXYDE GRACE A L'HUMIDITE DE L'AIR. L'AJOUT D'UNE COUCHE DE SILICE CONFERE A NOTRE DEPOT DE BONNES PROPRIETES ANTIREFLET, COMPARABLES A CELLES QUI AVAIENT ETE MODELISEES INITIALEMENT
Author: Michel Andre Aegerter
Publisher: Springer Science & Business Media
ISBN: 0387889531
Category : Technology & Engineering
Languages : en
Pages : 474
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Book Description
Sol-Gel Techniques for Glass Producers and Users provides technological information, descriptions and characterizations of prototypes, or products already on the market, and illustrates advantages and disadvantages of the sol-gel process in comparison to other methods. The first chapter entitled "Wet Chemical Technology" gives a summary of the basic principles of the sol-gel chemistry. The most promising applications are related to coatings. Chapter 2 describes the various "Wet Chemical Coating Technologies" from glass cleaning to many deposition and post-coating treatment techniques. These include patterning of coatings through direct or indirect techniques which have became very important and for which the sol-gel processing is particularly well adapted. Chapter 3 entitled "Bulk Glass Technologies" reports on the preparation of special glasses for different applications. Chapter 4 entitled "Coatings and Materials Properties" describes the properties of the different coatings and the sol-gel materials, fibers and powders. The chapter also includes a section dedicated to the characterization techniques especially applied to sol-gel coatings and products.
Author: Paras N. Prasad
Publisher: Springer Science & Business Media
ISBN: 1461524474
Category : Science
Languages : en
Pages : 691
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Book Description
This book presents the proceedings of the Second International Conference on Frontiers of Polymers and Advanced Materials held in Jakarta, Indonesia during January 10-15, 1993. This conference was organized and sponsored by the Indonesian Institute of Sciences (LIPI), the State University of New York (SUNY) at Buffalo, the Agency for Assessment and Application of Technology (BPPT), and the Indonesian Polymer Association. The 244 participants represented a total of 24 countries and a wide variety of academic, industrial and government groups. The inauguration was held in the Royal Palace and was performed by President Soeharto of Indonesia. High level media coverage ensured worldwide recognition. The need for such a conference was emphasized by the fact that polymers have emerged as an important class of materials offering challenging opportunities for both fundamental research and new technological applications. There has been a tremendous growth of interest in the field of polymers, both in academia and in industry, and polymer science offers tremendous opportunities for both fundamental and applied work. This globally represented Second International Conference on Frontiers of Polymers and Advanced Materials was timely, especially given the current heightened enthusiasm for polymers and emerging novel applications.
Author: Xavier Dieudonné
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Book Description
Les procédés de dépôt de couches minces optiques par voie physique ou par voie sol-gel présentent par nature des limitations pour la réalisation de revêtements épais (>1 μm) et ont alors recours à des empilements multicouches pour la préparation de miroirs diélectriques ou de polariseurs. C'est pour ces raisons qu'il est intéressant d'étudier les conditions permettant d'augmenter l'épaisseur critique des films sol-gel notamment. Après avoir étudié la capacité d'empilements des couches colloïdales, trois principaux paramètres ont été identifiés permettant d'augmenter l'épaisseur critique d'empilements monomatériaux et multimatériaux. Ces paramètres sont : l'épaisseur déposée,les interactions chimiques entre les particules et le temps de séchage du film. Ils influencent la microstructure des empilements et par conséquent les propriétés optiques et mécaniques. En contrôlant tous ces paramètres, nous avons montré qu'il est possible de préparer des empilements colloïdaux de fortes épaisseurs ouvrent la voie à la préparation sol-gel de miroirs de hautes performances et/ou de polariseurs. En outre, un développement spécifique de méthodes de caractérisations optiques et mécaniques a été nécessaire pour l'étude de ces films sol-gel, à la fois minces et fragiles.
Author: J.-P. Caliste
Publisher: Springer Science & Business Media
ISBN: 3642722075
Category : Technology & Engineering
Languages : en
Pages : 406
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Book Description
J.-P. CALISTE, A. TRUYOL AND J. WESTBROOK The Series, "Data and Knowledge in a Changing World", exemplifies CODATA's primary purpose of collecting, from widely different fields, a wealth of information on efficient exploitation of data for progress in science and technology and making that information available to scientists and engineers. A separate and complementary CODATA Reference Series will present Directories of compiled and evaluated data and Glossaries of data-related terms. The present book "Thermodynamic Modeling and Materials Data Engineering" discusses thermodynamic, structural, systemic and heuristic approaches to the modeling of complex materials behavior in condensed phases, both fluids and solids, in order to evaluate their potential applications. Itwas inspired by the Symposium on "Materials and Structural Properties" held during the 14th International CODATA Conference in Chambery, France. The quality of the contributions to this Symposium motivated us to present" a coherent book of interest to the field. Updated contributions inspired by Symposium discussions and selections from other CODATA workshops concerning material properties data and Computer Aided Design combine to highlight the complexity of material data issues on experimental, theoretical and simulation levels Articles were selected for their pertinence in three areas. Complex data leading to interesting developments and tools such as: • new developments in state equations and their applications, • prediction and validation of physical and energy data by group correlations for pure compounds, • modeling and prediction of mixture properties.
Author: Philippe Boch
Publisher: John Wiley & Sons
ISBN: 0470394544
Category : Technology & Engineering
Languages : en
Pages : 593
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Book Description
This book is primarily an introduction to the vast family of ceramic materials. The first part is devoted to the basics of ceramics and processes: raw materials, powders synthesis, shaping and sintering. It discusses traditional ceramics as well as “technical” ceramics – both oxide and non-oxide – which have multiple developments. The second part focuses on properties and applications, and discusses both structural and functional ceramics, including bioceramics. The fields of abrasion, cutting and tribology illustrate the importance of mechanical properties. It also deals with the questions/answers of a ceramicist regarding electronuclear technology. As chemistry is an essential discipline for ceramicists, the book shows, in particular, what soft chemistry can contribute as a result of sol-gel methods.
Author:
Publisher:
ISBN:
Category : Laser materials
Languages : en
Pages : 888
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Book Description
Author: Paras N. Prasad
Publisher: Springer Science & Business Media
ISBN: 1489901124
Category : Science
Languages : en
Pages : 859
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Book Description
This book summarizes the state ofthe art research presented at the Fourth International Conference on Frontiers of Polymersand Advanced Materialsheld in Cairo, Egypt in January 4-9, 1997. This conference follows the successful conferences held in Kuala Lumpur, Malaysia in 1995, in Jakarta, Indonesia in 1993 andin New Delhi, India in 1991. These conferences focussed on the most recent and important advances in a wide range of carefully chosen subject areas dealing with advanced materials, their science and technology and new business opportunities resulting from recent technological advances. As its predecessors, the conference held in Cairo was truly international with strong participation of 488 deiegales representing 37 countries from the USA and Egypt, as weil as Europe, South East Asia, Japan, South Africa and the Middle East. The conference was organized by the Egyptian Academy of Scientific Research and Technology, The Arab Society ofMaterials Science and the State University ofNew Y ork at Butfalo. The stated goals ofthe conference were: • To highlight advances and new. findings in the general area of polymers and advanced materials. - • T o foster global collaboration between the USA, Egypt and other nations in the general field of polymers and advanced materials. • To promote the development of scientific ilifrastructure in this field among the different participating countries, especially in the Middle East. • To create a basisforfuture long-term scientific exchanges between the USA and Egypt, and/or other countries.
Author: H. Angus MacLeod
Publisher: CRC Press
ISBN: 1420073036
Category : Technology & Engineering
Languages : en
Pages : 810
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Book Description
Written by a world-renowned authority of optical coatings, Thin-Film Optical Filters, Fourth Edition presents an introduction to thin-film optical filters for both manufacturers and users. The preeminent author covers an assortment of design, manufacture, performance, and application topics. He also includes enough of the basic mathematics of optical thin films to enable readers to carry out thin-film calculations. This new edition of a bestseller retains most of the descriptions of older design techniques because of their importance in understanding how designs work. However, this edition includes a substantial amount of new material as well. A new chapter on color takes into account the increasing importance of color in optical coatings. In addition, a new section discusses the effects of gain in optical coatings. This comprehensive yet accessible book continues to offer valuable insight into the principles, techniques, and processes of successful coating design. It provides the sound foundation required to make further advances in the field.
