By Alan D. Wilson;John W. Nicholson
There was a failure to acknowledge acid-base cements as a unmarried, well-defined type of fabric. This ebook makes an attempt to therapy this example by way of unifying the topic and treating this diversity of fabrics as a unmarried category. Following a short old evaluate, an introductory bankruptcy defines those cements as fabrics which are shaped by means of reacting a simple powder with an acidic liquid to yield a salt-like matrix. the character of the cementation method and the cement-forming acids and bases are mentioned. different chapters are dedicated to the tools of research, the constitution of water and straightforward polyelectrolyte idea.
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Extra info for Acid-Base Cements: Their Biomedical and Industrial Applications (Chemistry of Solid State Materials)
These include flocculent precipitates where particles generally consist of fibres in brush-heap disarray or connected in irregular networks. Since the matrices of AB cements bear some similarity to alginate gels they most probably fall into type 3. The classical theory of gelation, due to Flory (1953, 1974), sees gelation as the result of the formation of an infinite three-dimensional network. According to Flory, the theory can be applied without ambiguity to the type 2 (covalent) gels and is also applicable to type 3 gels.
It is formed when water vapour condenses on surfaces cooled to below -160°C. It is not appropriate in this chapter to give a detailed review of the solidstate behaviour of water in its various crystalline modifications. However, there are some general structures which are relevant and worth highlighting. Firstly, water molecules in these various solids have dimensions and bond angles which do not differ much from those of an isolated water molecule. Secondly, the number of nearest neighbours to which each individual molecule is hydrogen-bonded remains four, regardless of the ice polymorph.
1978). The Lewis acid-base definitions: a status report. Chemical Reviews, 78, 1-22. Kingery, W. D. (1950a). Fundamental study of phosphate bonding in refractories. I. Literature review. Journal of the American Ceramic Society, 33, 239-41. 27 Theory of acid-base cements Kingery, W. D. (1950b). Fundamental study of phosphate bonding in refractories. II. Cold setting properties. Journal of the American Ceramic Society, 33, 242-7. Kolthoff, I. M. (1944). The Lewis and Bronsted-Lowry definitions of acids and bases.
Acid-Base Cements: Their Biomedical and Industrial Applications (Chemistry of Solid State Materials) by Alan D. Wilson;John W. Nicholson