Электродвижущая сила горения в периодической таблице

Abstract

Heterogeneous combustion (or self-propagating high-temperature synthesis (SHS)) is widely used for making inorganic materials. SHS in such systems is accompanied by generation of electric potentials, which appear between the combustion wave front and condensed products of combustion as a result of chemical ionization of starting materials and intermediate products (so-called Electro Motive Force of combustion - EMF). Maximal registered EMF signals in SHS now having amplitude more than 2 Volts. Experiments were carried out for ions of the starting reagents as well as ions of intermediate and final products. Control of the processes may be carried out by using external electric and magnetic fields. During SHS-process intermediate reaction products arise in an ionic form. In condensed media SHS processes involve an electrochemical stage, which can be considered to be a concentration cell, that moves together with the combustion wave front and result in origin of EMF of combustion. As a result of that, the full ion-diagrams of combustion processes have been constructed for many complex oxide systems with the elements of I-VIII groups of Periodic Table. It is opening the wide horizons for the diagnostics of heterogeneous combustion processes at micro and nano-level. Besides that, as a result of our experiments, preconditions for the new directions in combustion science have been formed, such as ionic chemistry of heterogeneous combustion and dynamic ionography of heterogeneous combustion processes. External electrical and magnetic fields modify combustion parameters of the SHS systems (including EMF).