4 research outputs found
ПОЛУЧЕНИЕ АКТИВНОГО ОКСИДА АЛЮМИНИЯ И НИЗКОПЛАВКОГО ЭЛЕКТРОЛИТА
There was examined a possibility of activated alumina obtaining with extended specific surface y using of pseudoboehmite. There were conducted tests of given product dissolution in low-melting electrolyte with furthering usage of it’s at electrowinning of aluminum.For comparison of low-melting and commercial electrolyte were applied different modern physicochemical analysis methods. There was demonstrated that low-melting electrolyte has complete other constitution, and consist not from mix of fluorides as artificial electrolyte, but possessed of ionic constitution. There was demonstrated a possibility of electrochemical obtaining of aluminum attemperature 780 °CИзучена возможность получения активного оксида алюминия с развитой удельной поверхностью с использованием псевдобемита. Проведены испытания растворения данного продукта в низкоплавком электролите с дальнейшим использованием его при электролитическом получении алюминия. Для сравнения низкоплавкого и промышленного электролитов были применены различные современные физико-химические методы анализа. Показано, что низкоплавкий электролит имеет совершенно другое строение и состоит не из смеси фтористых солей, как искусственный электролит, а обладает ионным строением. Показана возможность проведения электрохимического получения алюминия при температуре 780 °С
The structure of Green functions in quantum field theory with a general state
In quantum field theory, the Green function is usually calculated as the
expectation value of the time-ordered product of fields over the vacuum. In
some cases, especially in degenerate systems, expectation values over general
states are required. The corresponding Green functions are essentially more
complex than in the vacuum, because they cannot be written in terms of standard
Feynman diagrams. Here, a method is proposed to determine the structure of
these Green functions and to derive nonperturbative equations for them. The
main idea is to transform the cumulants describing correlations into
interaction terms.Comment: 13 pages, 6 figure