III International Conference

PP-II-67referee-free analysis was about the only possible because of the phase composition of samplestested was practically unknown a priori.DD being used for studying processes of phase formation for catalysts and other materialsof complex nature detected all compositional variations of samples exposed to thermomechanical-chemicaltreatments, aggressive mediums or modified by some additives.Detection of amorphous and spatially inhomogeneous phases of varying composition in someheterogeneous catalysts has been made possible due to DD. Catalyst prepared mechanicchemically,being often amorphous and non-detected by diffraction methods, were the subjectof much experimentation by the DD method.The phase composition was determined ever for composite sorbents of high degree ofdispersion. The sorbents formed by salts of alkaline, alkaline-earth metals and copper werelocated in pores of silicogels, γ-Al 2 O 3 , and carbon materials of different nature. In this case aspecific interaction between the salts and the matrix surface were detected.Unique procedure was developed to separate effectively nanoparticles of MnFe 2 O 4 fromamorphous matrix of the K-Al-borate glasses. This made possible to study real compositionand real structure of the nanoparticles and to find ways of strict controls over them.Other examples of DD analysis applied to various subjects are also shown in order tosupport theoretical theses of the method and to demonstrate its unique ability to be usefuleven in seemingly intractable problems.This work is supported by RFBR (grant 05-03-32236).288