Mechanochemical Problems of the Synthesis of Titanates
MARINA V. VLASOVA1,2, J. G. GONZALEZ-RODRIGUEZ2, MYKOLA G. KAKAZEY2, ANDREY V. RAGULYA1 AND TAMARA V. TOMILA1
1Institute for Problems of Materials Science, NAS of Ukraine,
Ul. Krzhizhanovskogo, 3, Kiev 03142 (Ukraine), E-mail: tomila@ipms.kiev.ua
2Centro de Investigaciones en Ingenieria y Ciencias Aplicadas UAEM, Cuernavaca, Mexico,
E-mail: kakazey@hotmail.com
Pages: 213-220
Abstract
An analysis of thermal processes occurring during mechanical treatment (MT) is presented. A two-stage scheme of development of thermal processes in ZnO, ZnO - TiO2 systems is proposed and their role in the formation of the resulting defect structure is discussed. At the first stage of the MT, the collectivized processes of destruction of individual particles are observed. The second stage of processing is connected with the development of annealing effects caused by heat accumulation processes by the whole sample. The annealing processes favour the formation and accumulation of a set of associates of simple defects that accelerate diffusion processes in components of the mixtures. The processes of accumulation of associates of defects in the sample and a significant rise in the average temperature of the sample are major factors determining the progress of a mechanochemical reaction of the type ZnO + TiO2
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