Preparation of inorganic composites and ceramic using colloidal solutions
Abstract
Preparation of inorganic composites and ceramic using colloidal solutions
Incoming article date: 10.08.2018In this paper, we present a review of the use of colloidal solutions in the preparation of inorganic composites and ceramics. Sol-gel direction in the technology of ceramics and inorganic composites, which is the formation of materials from solutions using sol-gel processes, has been intensively developed in recent years. One of the main types of raw materials in these processes are colloidal solutions - sols of oxides of various metals. The most important factors characterizing the perfection of the process of synthesis of sols are aggregative stability, the maximum attainable concentration, monodispersity of the sol. In the presented review, methods for obtaining metal oxide sols. The most common methods of obtaining sols are dialysis and electro dialysis, ion exchange, peptization of gels, hydrolysis and electrolysis of metal compounds. The influence of various factors on the stability of sols. The most important characteristics of sols that determine their behavior are chemical composition, particle size, their size distribution, concentration, pH value, viscosity. Based on the analysis of various literature data, we have shown the possibilities of using sols for the preparation of inorganic composites and ceramics.
Keywords: colloidal solutions, sols of metal oxides, stability of sols, inorganic composites, ceramics