By Robert Feigelson

ISBN-10: 0444516506

ISBN-13: 9780444516503

There isn't any query that the sector of stable nation electronics, which primarily all started with paintings at Bell laboratories simply after international battle II, has had a profound impression on contemporary Society. what's now not approximately so widely recognized is that advances within the artwork and technology of crystal progress underpin this know-how. unmarried crystals, as soon as valued just for their attractiveness, at the moment are came across, in a single shape or one other in such a lot digital, optoelectronic and various optical units. those units, in flip, have permeated virtually each domestic and village in the course of the global. in truth it really is difficult to visualize what our electronics undefined, less our complete civilization, could were like if crystal progress scientists and engineers have been not able to supply the big, illness loose crystals required through equipment designers. This booklet brings jointly units of similar articles describing advances made in crystal development technological know-how and expertise given that international warfare II. One set is from the lawsuits of a Symposium held in August 2002 to have a good time 50 years of growth within the box of crystal progress. the second one comprises articles formerly released within the e-newsletter of the yankee organization for Crystal development in a chain known as "Milestones in Crystal Growth". the 1st portion of this e-book includes a number of articles which describe the various early background of crystal development ahead of the electronics revolution, and upon which smooth crystal progress technological know-how and expertise is predicated. this can be by way of a different article through Prof. Sunagawa which gives a few perception into how the profitable jap crystal progress built. the subsequent part bargains with crystal progress basics together with suggestions of solute distribution, interface kinetics, constitutional supercooling, morphological balance and the expansion of dendrites. the subsequent part describes the expansion of crystals from melts and recommendations, whereas the ultimate half consists of skinny movie progress via MBE and OMVPE. those articles have been written via one of the most well-known theorists and crystal growers operating within the box. they're going to offer destiny learn employees with important perception into how those pioneering discoveries have been made, and convey how their very own study and destiny units can be dependent upon those advancements. ·Articles written by means of probably the most recognized theorists and crystal growers operating within the field·Valuable perception into how pioneering discoveries have been made.·Show how their very own learn and destiny units could be established upon those advancements

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Extra info for 50 Years Progress in Crystal Growth: A Reprint Collection

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This was, however, due to the accidental presence of iron and other contaminants (A7). Later Mr. Paris of the Pasteur Institute concluded that cobalt oxide gave the blue of sapphire. However, calcium and magnesium oxides had also been added [15,16]. As Verneuil pointed out (A7), the addition of MgO changes corundum to spinel. Now cobalt does give a blue coloration to spinel, having a somewhat different shade from the blue of sapphire; cobalt by itself, however, does not impart any color to otherwise pure corundum.

In the meantime, significant progress was achieved in crystal growth technology. A great deal of effort was made in the field of experimental mineralogy, stimulated not least by the search for recipes to make synthetic gem-stones. As early as 1837 Gaudin, and then Böttger (1839) and Elsner (1839) prepared small ruby crystals by melting a mixture of potassium alum and potassium chromate. Fremy (1891), cooperating with Verneuil in his attempts to grow gem-stones and other crystals from high temperature solutions, used large crucibles containing up to 50 liters of melt but they got mm-sized crystals only, mainly because of the poor temperature stability of their furnaces.

It is possible that such a tube was also used in the earlier steps A and D of Figure 6. The complexity of this process undoubtedly originated in the realization that cracking of the completed boule arises from intimate contact with the support if the process of step A of Figure 6 is continued to form a large crystal. As will be seen, Verneuil faced the same problem in 1891, but found a different and much more practical solution. 2. Verneuil’s flame fusion experiments Having thus been introduced to the concept of making ruby by the fusion of purified alumina containing Fig.

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50 Years Progress in Crystal Growth: A Reprint Collection by Robert Feigelson

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