Przeglądaj Rocznik Naukowo-Dydaktyczny. Prace Fizyczne według tytułu
Wyświetlanie pozycji 54-73 z 79
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Uogólnienie warunku przyczynowości N.N. Bogolubowa
(1990)Paper discusses the general causality condition formulated basing on the generalized scheme of axiomatic quantum field theory of N.N. Bogolubov. -
Urządzenie do mierzenia fotoindukowanej luminescencji
(1986)The construction of a simple device for measurements of photoinduced, slowly decaying luminescence from biological samples is described. Construction elements and subsystems available at the domestic market are mainly ... -
Wpływ częstotliwości i kształtu impulsów pola pomiarowego na mierzone wartości polaryzacji orientacyjnej ferroelektrycznej ceramiki PLZT
(1986)Selected problems of the methodics of measuring the orientation polarization (P[r]) of ceramic ferroelectrics were discussed on the example of the ceramics PLZT 9/65/35. These ceramics can be easily switched as their ... -
Wpływ defektów tlenowych na zmiany temperaturowe przewodnictwa elektrycznego niestechiometrycznego niobianu sodu
(1984)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 ... -
Wpływ domieszek $La_2O_3$ na własności elektryczne niobianu sodu $NaNbO_3$
(1984)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 ... -
Wpływ domieszek na własności elektryczne $NaNbO_3$
(1986)Influence of the modifiers Ba, Ca, La and Ti on electric properties of $NaNbO_3$ was studied. Data concerning their influence on electric conductivity, dielectric permeability and Curie point are presented. Dependance ... -
Wpływ niestechiometrii na zmiany czasowe i temperaturowe prądu depolaryzacji ceramiki niobianu sodu
(1986)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 ... -
Wpływ pola magnetycznego na własności $BaTiO_3$
(1986)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 ... -
Wpływ redukcji tlenowej na zmiany temperaturowe przewodnictwa elektrycznego niobanu sodu
(1980)A design of a new quartz thermostate is described. It controls: 1) The temperature of the sample from ambient temperature to 1270 K, 2) The pressure of the atmospheric air or other gases within the range from $133,3°10^{-6}$ ... -
Wpływ składu procentowego na własności elektryczne roztworu stałego Pb/Zr[x]Ti[1-x]/O[3] dla 0,46 ≤ x ≤ 0,60
(1977)Temperature depedence of dielectric constant ε, electric conductivity, Seebeck's coefficient, were studied around the morphotropic boundary of the solution. On the ground of polaron theory of transport, charge carrier ... -
Wpływ stałego pola elektrycznego i magnetycznego na zmiany temperaturowe przenikalności elektrycznej w BaTiO[3]
(1986)Influence of the constant electric field on temperature changes of electric permeability in BaTiO[3] were studied. It was found that the Curie temperature shifts towards higher value and that the value of max decreases ... -
Wskaźnik typu przewodnictwa elektrycznego materiałów półprzewodnikowych
(1984)Operation principle of a tester for measuring type of a semiconductor (n or p). Main design features and parameters of the tester are detailed. -
Wyniki wstępnych badań nad przebiegiem procesu myślenia uczniów podczas rozwiązywania problemów fizycznych
(1980)Results of the preliminary investigations on ways of thinking processes in solving physical problems are presented. The investigations were organized in high school classes for groups of students regarded by teachers as ... -
Wysokotemperaturowe ciepło właściwe tytanianu boru
(1986)It has been measured the specific heat c[p] of ceramic samples of BaTiO[3] using a cooling method in the temperature range 330-430°K. It found the phase transition at about 392°K what was seen as a peak on the plot c [p]= ... -
Wyznaczanie współczynnika efektywności termoelektrycznej niobianu sodu
(1977)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 ... -
Własności dielektryczne monokryształów $Pb(Cd_{1/3}Nb_{2/3})O_3$
(1990)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 ... -
Własności elektryczne niestechiometrycznego $NaNbO_3$
(1986)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 ... -
Własności elektryczne roztworu stałego PLZT
(1980)The temperature dependences of the electric permeability, electric conductivity. Seebeck coefficient and current - voltage characteristics for the solid solution (Pb[0,92]La[0,08]) (Zr[0,65]Ti[0,55) O[3], were studied. ... -
Własności kryształów HgJ[2] i ich wykorzystanie w detekcji promieniowania γ
(1990)This paper present the optical spectra of red tetragonal HgJ[2] single crystal were investigated at 4.2K and 79K in 2-6eV region of photon energy and application obtain results in construction γ-ray detectors. -
Zależność między szerokością pasma wzbronionego a temperaturą Curie w ferroelektrycznych roztworach stałych ze strukturą typu perowskitu
(1990)On the base of the spectral dependence of the photoconductivity the width of forbidden band E[g] was determined in ferroelectric solid solutions: x PbTiO[3] – (1-x)SrTiO[3] I, x PbTiO[3] – (1-x)PbZrO[3] II, AgNbO[3] – ...