A concept of improving the transient process in an on-off temperature control unit. The power fed to the heating element is gradually increased or decreased in response to a sawtooth waveform from a generator controlled ...

The principle of operation of a silicon controlled rectifying regulator of temperature, driven by impulses, is discussed. The main design data of a prototype and its parameters are given.

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 ...

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) ...

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 ...

Time and temperature changes of polarisation and depolarisation currents of the $NaNbO_3$ ceramics samples assumed to have correct stoichiometric content and of the samples $NaNbO_3$ having the excess of niobium or sodium ...

Dla niestechiometrycznej ceramiki niobianu sodu zbadano temperaturową zależność współczynnika Seebecka i określono typ przewodnictwa elektrycznego. Stwierdzono, że wartość współczynnika Seebecka zależy od stopnia ...

Complex admittance measurements for the polycrystalline sample of sodium niobate with nonstoichiometric composition has been carried out at very low frequencies with the help of direct phase-amplitude method. Results ...

Systematic studies of the dependence of dielectric and semiconducting properties on the deviation from stoichiometry have been undertaken. A complex picture of the dependence of studied properties on the chemical ...