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crystallization |
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crystallization [‚kris·tə·lə′zā·shən] (crystallography) The formation of crystalline substances from solutions or melts. Crystallization The formation of a solid from a solution, melt, vapor, or a different solid phase. Crystallization from solution is an important industrial operation because of the large number of materials marketed as crystalline particles. Fractional crystallization is one of the most widely used methods of separating and purifying chemicals. In fractional crystallization it is desired to separate several solutes present in the same solution. This is generally done by picking crystallization temperatures and solvents such that only one solute is supersaturated and crystallizes out. By changing conditions, other solutes may be crystallized subsequently. Repeated crystallizations are necessary to achieve desired purities when many inclusions are present or when the solid solubility of other solutes is significant. For a discussion of crystallization in glass, a supercooled melt. Polymer crystals obtained from solutions are used to study the properties of these crystals, while crystallization of polymer melts dramatically influences polymer properties. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The modified baking process that was used to create higher-density bread may have decreased the extent of crystal formation and the firmness of the crumb, thereby improving the textural characteristics and shelf life of the bread. Because higher process temperatures are required for Pb-free wave soldering processes, intermetallic crystal formation is more commonplace than in standard SnPb soldering. We will test this hypothesis by examining the corrosion behavior of sandstone when it is constantly submerged in saline solutions (without crystal formation occurring). |
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