Authors: F.I. Panteleenko, R.Yu. Popov, H.N. Shymanskaya

Title of the article: On the effect of possible substitutions in the crystal structure of cordierite

Year: 2022, Issue: 6, Pages: 36-49

Branch of knowledge: 05.02.08 Engineering Technology

Index UDK: 549.632

DOI: 10.26730/1999-4125-2022-6-36-49

Abstract: The article discusses the processes occurring in the production of technical ceramics based on cordierite, widely used in the metallurgical industry, machine tool construction, automotive industry, and other. The results of studies of materials synthesized using small amounts of modifier oxides that contribute to the activation of the formation of a heat-resistant crystalline phase of cordierite and its high-temperature modification of indialite, characterized by low values of the temperature coefficient of linear expansion, are presented. Examples of possible substitutions in the crystal structure of cordierite occurring with the use of various oxide additives, the causes of probable substitutions are described. The influence of these modifiers on the thermophysical characteristics of ceramics is investigated. The temperature ranges at which modifier oxides exhibit their activity in experimental compositions are determined. A model of the formation of a high-temperature modification of cordierite (indialite) in the process of ceramic synthesis is proposed. The research results are of theoretical and practical interest in the field of synthesis of heat-resistant materials, expand the understanding of the processes occurring in multicomponent systems, and allow us to get closer to understanding the algorithm for the formation of crystalline phases, creating prerequisites for controlling it. The use of the proposed methods and methods of influence makes it possible to increase production efficiency by intensifying the processes of synthesis of materials at low temperatures.

Key words: modifiers additives solid solutions synthesis cordierite indialite temperature coefficient of linear expansion phase composition

Receiving date: 17.11.2022

Approval date: 01.12.2022

Publication date: 27.12.2022

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