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Date: 24-5-2016
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Date: 8-5-2017
1421
Date: 20-5-2017
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IMPERFECTIONS AND IMPURITIES IN SOLIDS
Up to this point, we have been considering an ideal single-crystal structure. In areal crystal, the lattice is not perfect, but contains imperfections or defects; that is, the perfect geometric periodicity is disrupted in some manner. Imperfections tend to alter the electrical properties of a material and, in some cases, electrical parameters can be dominated by these defects or impurities.
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لصحة القلب والأمعاء.. 8 أطعمة لا غنى عنها
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حل سحري لخلايا البيروفسكايت الشمسية.. يرفع كفاءتها إلى 26%
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اللجنة المشرفة على المهرجان النسوي الثاني تقدم شكرها للعتبة العباسية لدعمها إقامته في باكستان
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