Chemical Durability Improvement and Static Fatigue of Glasses
Chemical Durability Improvement and Static Fatigue of Glasses

Author: Minoru Tomozawa

Publisher:

Published: 1979

Total Pages: 33

ISBN-13:

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The Surface layer of heat-treated borosilicate glasses exhibited lower HF etching rate compared with the bulk. The chemical analysis of the same glass indicated an excess Al2O3 concentration in the surface layer. The low HF etching rate was attributed to the lowering of the immiscibility dome by the excess Al2O3 and the consequent shift of the composition. A prolonged heat-treatment of glasses produced a surface stress layer. This surface stress was found to change its sign when the glass was heat-treated in wet atmosphere. The surface stress was attributed to the different water content in the surface layer from that in the bulk. Chemical durability, especially the etching rate of a glass in hot NaOH solution was found to be reduced by coating the glass with Zr alcoxide. The Zr compound appears to deposit on the etched surface continuously protecting the glass. Direct confirmation of the stress corrosion, i.e., the stress- accelerated reaction of glass with aqueous solution was attempted. Preliminary investigation showed that reactions are accelerated by tensile stress and retarded by compressive stress. (Author).

Sol-Gel Technologies for Glass Producers and Users
Sol-Gel Technologies for Glass Producers and Users

Author: Michel Andre Aegerter

Publisher: Springer Science & Business Media

Published: 2013-03-19

Total Pages: 474

ISBN-13: 0387889531

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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.

Handbook of Adhesives and Sealants
Handbook of Adhesives and Sealants

Author: Edward M. Petrie

Publisher: McGraw Hill Professional

Published: 2007-01-02

Total Pages: 1075

ISBN-13: 0071709819

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The Handbook of Adhesives and Sealants, 2nd Edition is primarily written to assist all those who have a permanent or temporary interest in adhesives and sealants. For those new to the field, the Handbook will provide a fundamental knowledge base of materials and processes as well as reasons why they work and (more importantly) why they don’t work. To the more experienced reader, the breadth and thoroughness of the Handbook will provide a way to reduce time spent on trial and error development or on searching for the optimal recommended process. For the academic, the Handbook will connect the important theories regarding surface science, polymeric materials, and mechanics with practical products and applications of commercial significance. This edition includes major new sections on radiation curable adhesive, biological and naturally occurring adhesives, inorganic adhesives, role of bulk properties of the adhesive, non-destructive testing, and industrial application methods. A completely new chapter is devoted to adhesives used in various industries such as automobile, electrical / electronic, construction, packaging, aerospace, household do-it-yourself, and medical.

Epoxy Adhesive Formulations
Epoxy Adhesive Formulations

Author: Edward Petrie

Publisher: McGraw Hill Professional

Published: 2005-09-09

Total Pages: 554

ISBN-13: 0071455442

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Unmodified, epoxy resins cause certain problems for both the adhesive formulator and end-user. They are often rigid and brittle; hence, impact resistance and peel strength are poor. For decades, Chemist have been vigorously working to minimize these major shortcomings. Based on a popular course sponsored by the Society of Plastics Engineers and written by an authority in the field, this comprehensive text presents a variety of methods to accomplish what up to now has been a formidable task. Beginning with epoxy chemistry, moving on to fillers, filler treatments, and surfactants, and ending with current and future development in formulating Epoxy Adhesives, this rigorous text addressed the problem of improving flexibility, durability and strength by adding chemical groups to the epoxy structure either via the base resin or the curing agent or by adding separate flexibilizing resins to the formulation to create an epoxy-hybrid adhesive.

Additives for Coatings
Additives for Coatings

Author: Johan Bieleman

Publisher: John Wiley & Sons

Published: 2008-09-26

Total Pages: 390

ISBN-13: 3527613315

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No doubt: A perfect coating has to look brilliant! But other properties of coatings are also most important. Coatings have to be durable, tough and easily applicable. Additives are the key to success in achieving these characteristics, even though the amounts used in coating formulations are small. It is not trivial at all to select the best additives. In practice, many series of tests are often necessary, and the results do not explain, why a certain additive improves the quality of a coating and another one impairs the coating. This book is dedicated to developers and applicants of coatings working in research or production, and it is aimed at providing a manual for their daily work. It will answer the following questions: How do the most important groups of additives act? Which effects can be be achieved by their addition? Scientific theories are linked to practical applications. Emphasis is put on the optical aspects that are most important for the applications in practice. This book is a milestone in quality assurance in the complete field of coatings!

Six Sigma Distribution Modeling
Six Sigma Distribution Modeling

Author: Andrew Sleeper

Publisher: McGraw Hill Professional

Published: 2007-01-09

Total Pages: 1075

ISBN-13: 0071482784

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Intended for those who want to select and apply a statistical model, this title includes an explanation of distribution flowcharts.