Phase equilibria in sections of the MgCl2-MgCl2 & sdot;4CO(NH2)2-H2O system at temperatures from 0 to -46 degrees C were studied. The earlier assumption that the formation of the low-temperature eutectic in the MgCl2-CO(NH2)2-H2O system is caused by the compound MgCl2 & sdot;4CO(NH2)2 was confirmed. Several low-temperature eutectic mixtures promising for the development of deicing reagents were identified.
A method for the synthesis of the TiO2/SiO2 binary xerogel (5-40% TiO2) using a TiO2/NaCl composite and hydroxylated SiO2 xerogel was developed. The TiO2/NaCl composite was obtained by adding salt to the product of the interaction of tetrabutoxytitanium and hydrogen peroxide followed by drying and calcination at 700 degrees C. Analysis of IR spectroscopy data indicates interaction between TiO2 particles and particles of amorphous silica with the formation of a Si-O-Ti bond. The specific catalytic activity of TiO2 particles in the model process of hydrogen peroxide decomposition increases with an increasing fraction of silica in the material.
Phase equilibria in sections of the MgCl2-MgCl2 & sdot;CO(NH2)2 & sdot;4H2O-H2O system at temperatures from 0 to -37.5 degrees C were studied, and a preliminary assessment of the feasibility of using the compound MgCl2 & sdot;CO(NH2)2 & sdot;4H2O for the development of deicing reagents based on it was given.
Phase equilibria in sections of the MgCl2–MgCl2⋅CO(NH2)2⋅4H2O–H2O system at temperatures from 0 to –37.5°C were studied, and a preliminary assessment of the feasibility of using the compound MgCl2⋅CO(NH2)2⋅4H2O for the development of deicing reagents based on it was given.
Ceramic pigments with a wollastonite structure were synthesized using natural quartz sand and limestone. At 1300°C and a firing time of 1 h, α-wollastonite forms in samples containing 5–10
