The work is devoted to the issues of obtaining thermal insulation materials using local mineral resources. The focus of this study is to create refractory thermal insulation consisting of a porous filler in the form of expanded rocks (hydrophlogopite, perlite) using the technology of ceramic or ceramic-chemical binders based on clay raw materials of varying fire resistance and plasticity. The study of structural changes in the obtained materials understep by step raised temperature conditions was carried out using X-ray phase and microprobe analysis. Analysis of the results showed that the density of hydrophlogopite-based samples on a clay-phosphate binder increases by 30…35 % compared to samples on a ceramic binder. In samples with perlite filler, the introduction of a phosphate binder does not have a significant effect on the apparent density. Pre-synthesized clay phosphate binder on red-burning clay, introduced into the initial perlite mixtures, allows increasing the strength of samples by 2 times without increasing density and thermal conductivity. A study of changes in the strength characteristics of perlite ceramic samples on various phosphate binders in the temperature range of 300…950 ?С showed the stability of the material in strength up to 800 ?С, which indirectly characterizes the transformation of the structure and its operating temperature. Based on the compositions “expanded hydrophlogopite-secondary Samarkand kaolin” and “expanded perlite-secondary Samarkand kaolin-clay phosphate binder on red-burning clay”, thermal insulation materials with improved thermomechanical properties for operating temperatures of 850…1100 ?С were obtained by the method of semi-dry pressing.
Marina Kh. Rumi – PhD, senior researcher, Laboratory of Heat-Accumulating, Heat-Insulating Materials and Solar Technologies, Institute of Materials Science of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
Shahlo K. Irmatova – junior researcher, Laboratory of Heat-Accumulating, Heat-Insulating Materials and Solar Technologies, Institute ofMaterials Science of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
Zulayho R. Kadyrova – Doctor of Chemical Sciences, Professor, head of Laboratory Chemistry and Chemical Technology of Silicates, Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan,Tashkent, Republic of Uzbekistan
Ella M. Urazaeva – junior researcher, Laboratory of Heat-Accumulating, Heat-Insulating Materials and Solar Technologies, Institute of Materials Science of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
Shavkat R. Nurmatov – PhD, deputy of science, Institute of Materials Science, Academy of Sciences of Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
Mars A. Zufarov – junior researcher, Laboratory of Heat-Accumulating, Heat-Insulating Materials and Solar Technologies, Institute of Materials Science of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
Elvira P. Mansurova – junior researcher, Laboratory of Heat-Accumulating, Heat-Insulating Materials and Solar Technologies, Institute of Materials Science of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
Zhakhongir K. Ziyovaddinov – junior researcher, Laboratory of Heat-Accumulating, Heat-Insulating Materials and Solar Technologies, Institute of Materials Science of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
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