Formation and Thermal Properties of Hydrosilicates with a Chrysotile Structure in the MgO–NiO–MeO–MeꞌO–SiO2–H2O (NaOH) System, Where Me and Meꞌ Are Cu and/or Fe, Using Mixed Metal Hydroxides as Reagents

In this study, hydrosilicates with a chrysotile structure in the MgO–NiO–MeO–Me′O–SiO2–H2O (NaOH) systems are obtained using the reverse precipitation method followed by hydrothermal treatment, where Me and Me′ are Cu and/or Fe. The phase and elemental compositions are determined by X-ray spectral microanalysis and X-ray phase analysis, and the parameters of the crystal cell of the samples are calculated. The influence of the initial Ni-based nanoplatelets with Ni0.95 – xMgxCu0.05(OH)2/ Ni0.95xMgxFe0.05(OH)2/Ni0.90 – xMgxFe0.05Cu0.05(OH)2 composition is studied on the formation of mixed hydrosilicate nanotubes of the corresponding compositions with a chrysotile structure under hydrothermal conditions. The structure, morphology, and particle size parameters of the obtained nanopowders of mixed composition with a chrysotile structure are determined. The thermal stability of the obtained samples is determined using synchronous thermal analysis.