The temperature changes of electrical conductivity, as well as changes of the Seebeck coefficient and the electrical permeability of sodium niobate $NaNbO_3$, have been investigated. The obtained data were used to define ...

Temperature changes of the electrical conductivity and of the Seebeck coefficient for the ceramics $NaNbO_3$, and $NaNbO_3$ + 0.2% mol $La_2O_3$, have been investigated. The obtained results have been used to define the ...

To evaluate the possibilities of using sodium niobate in thermo-electric converters transforming heat energy into electric energy, the temperature changes of electric conductivity, of Seebeck coefficient and of the thermal ...

Influence of illumination on phase transition temperature, on dielectric permittivity and on pyro currents in $Ba_xSr_{1-x}Nb_2O_6$ was studied. Dependence of photoelectretic charge density on temperature in the region of ...

The temperaturę dependence of ε and tgδ was investigated for monocrystalline sample of $Pb(Cd_{1/3}Nb_{2/3})O_3$ various measurement field frequencies. A strong connection between dielectric properties and field frequency ...

Principle of operation and construction of device with programmed regulation of temperature difference. Basic parameters of device and example measurements of Seebech coefficient in $NaNbO_3$ were shown.

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 ...

The criterion of division solid solutions, based on sodium niobate in to ferro-, and antiferroelectric materials is described. The results of measurements are compiled in the table.

The temperature changes of current - voltage and current - time characteristics having been investigated, data are used to define the type of conductivity and to determine the activation energy of the charge carriers. ...