The method of hot pressing permits to obtain the ceramics of high density. It consist in simulate neons application of high temperature and pressure on charge made of pressed powder. The authors elaborated several devices ...

The block diagram of the digital Hall – effect teslometer intended to the fast determination of magnetic induction is presented and its functioning is described. Its possible application and some characteristics B(x) ...

The theory of AFE-PE phase transformation as formulated by Kittel is reviewed. The experimental values obtained from dielectric measurements are related, to the parameters of Kittel's thermodynamic function. Some of the ...

The operation principle of a dilatometer is described. The temperature changes of the coefficient of linear expansion were measured in temperature range between minus 196°C and plus 740°C. Linear expansion coefficient ...

Electric and fotoelectric properties of monocrystals $PbMg_{1/3}Nb_{2/3}O_3$ in low temperatures are discussed. It is found that in the region of low temperatures electric properties of $PbMg_{1/3}Nb_{2/3}O_3$ are to large ...

Electric properties of the compound $Na_{1-x}NbO_{3-0.5x}$ for 0<x<0.1 were studied. Influence of $Na_2O$ deficit on the sinter temperature on phase transition on dielectric and semiconducting properties of the ceramic ...

Measurements of electrical conductivity of nonstoichiometric $NaNbO_3$ were made in the air atmosphere under normal and reduced pressure. It was stated that the value of electrical conductivity is strongly effected by ...

The temperature changes of electric conductivity and of electric permittivity were investigated for the $NaNbO_3$ and $NaNbO_3$ + /0,1%, 0,2%, 0,25%, 0,3%, 0,4%, 0,5% and 1% mol $La_2O_3$/ ceramics. Obtained data were ...

Influence of the constant magnetic field on temperature changes of the dielectric constant and on the electric conductivity of $BaTiO_3$. It was shown for this material that together with the increase of the magnetic ...

Construction of the vacuum thermostat intended for measuring the heat conductivity of ferroelectrics and its temperature changes is presented. The properties of $NaNbO_3$ are studied in order to apply it in building the ...