VOL 86, No. 6 (2013)

The temperature-time parameters of the process of foaming glass charges with the use of a carbonate gas-former - microcalcite - have been studied, methods of purposeful influence with the help of technological and recipe factors on the characteristics of foam glass - density and water absorption have been proposed.

The influence of concentration and structural factors on the nature of the temperature dependence of the viscosity of glasses of the systems K ₂ O - B ₂ O ₃ - SiO _{2 and Na 2 O - B 2 O 3 - SiO 2 in the range of 109-104 Pa & middot ; with. The complex nature of the influence of boron and potassium oxides on the temperature dependence of viscosity in the region of the transition from a liquid to a plastic state is shown.}

Glasses of compositions Bi ₄ (Si _x Ge _1-x) ₃ O _{12 (x = 0.33; 0.5; 0.66, 1.00) and glass-crystalline materials based on them. The influence of the composition of the charge and the modes of heat treatment on the spectral characteristics of these materials has been determined.}

Experimental data on determining the long-term strength (time and deformation to fracture) of half-sintered periclase ceramics at temperatures up to 1600 ° C at loads of 20 - 50 MPa are presented. It is shown that the results of measurements of the steady-state creep rate can be used to determine the durability of materials without bringing them to failure.

Compositions of masses using quartz-feldspar raw materials of Ukraine in the presence of mineralizing oxides have been developed. The introduction of the developed energy-saving technology of household porcelain will significantly reduce the energy consumption of production and shorten the firing cycle.

The perspective application of magnetic filter-separators with a filtering matrix for cleaning ceramic suspensions is considered. The previously absent characteristics of the relative strength and induction of the magnetic field in the pores of the polyspherical matrix of the magnetic separator of the filtration type, used to remove ferro-impurities from ceramic suspensions, have been obtained.

The synthesis of ultramarine blue pigment is proposed by coprecipitation of cobalt and aluminum from nitrate solutions with anionite AB-17-8 in the OH-form, followed by calcining the precursor at 750 ° C for 4 hours. (IR and diffuse reflection). According to the results of electron microscopy, the size of the pigment particles was 50 - 80 nm.

A comparative analysis of the optical-color characteristics of known gray ceramic pigments and an assessment of the effectiveness of the action of various quenching components in their composition are carried out. With the use of open-hearth slag, gray pigments with stable optical characteristics were synthesized. The efficiency of using zirconium compounds as a muffler phase for their production, characterized by inertness with respect to the coloring components included in the pigment and high resistance to the dissolving effect of glass melts, is shown.