As a luminous center, Mn2+ has the advantages of high efficiency, safety, and cheap, which has been widely used to improve the color rendering index of garnet structure phosphors. Although,...

No abstract

The MD method for modeling vermiculite containing Na + , Rb + , Cs + , Mg 2+ , and Ba 2+ cations shows the following: With a weak swelling of clay, the temperature has no significant effect on the diffusion of water and cations through vermiculite. With a high content of water in vermiculite, the effect of temperature on the diffusion coefficient of water is greater than that of cations. We studied the structure of RDF ions in Na + -vermiculite, in which some of the cations are replaced by Rb + , Cs + , Mg 2+ , and Ba 2+ . Cations of alkali and alkaline earth metals compete with Na + ions for adsorption sites on the surface of the clay layer. The alkaline earth metal cations are in the middle between the clay layers due to their higher charge and stronger hydration. In this case, Na + is localized at the surface of the clay layer. Thus, cations of alkaline earth metals have little effect on the temperature dependence of the diffusion coefficient Na + .

No abstract

Резюме: Статья посвящена сравнительному анализу Ni в обоих микро-и наноструктур: типа и параметр решетки прямая типа ГЦК, обратная типа ОЦК. Показано, что Ni близка к величине энергии Ферми обычного металла и свойства Ni в микро-и наноструктуры существенно отличаются. При рассматриваемом размере наноструктуры Ni (размер которой лежит в диапазоне от 1 до 70 нм) основное влияние на изменение свойств Ni оказывает классический размерный эффект. Эти результаты были подтверждены путем сравнения размера порошка Ni с длиной волны де Бройля электрона в наноструктуры Ni. Физические причины изменены в свойствах наноструктуры никеля. В конце описывается технология получения и применение нано-никеля, и их проанализированы достатоки.Ключевые слова: прямая и обратная решетка, поверхность Ферми, классический размерный эффект, Нанопорошок, зона Бриллюэна. Nickel in micro-and nano-structureQiao Jingwen, Yang Yingshu, Wang Cailun 1Tomsk Polytechnic University (634050, Tomsk, Lenin Avenue, 30), e-mail: qiaojingwen1017@gmail.com Summary:The article is devoted to compare the properties of Ni in both micro-and nanostructures. It is shown that Ni is close to ordinary metal's largest Fermi energy and the properties of Ni in micro-and nanostructures are substantially different. When you consider the size of the nanostructure of Ni (70 nm), the main influence on the change of properties of Ni has the classic size effect. These results were confirmed by comparing the size of the Ni powder with the de Broglie wavelength of an electron in a nanostructure Ni. The physical reasons for the changes in the properties of the nanostructure of nickel as well as the methods of preparation and use of nanonikel are shown in the article.