Results 111 to 120 of about 18,116 (135)
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New aspects in ferroelectric ceramics
Ferroelectrics, 1980Abstract A survey will be presented about the considerable progress which recently has been achieved in the applicability of ferroelectric ceramics. This progress has been obtained by using conventional ferroelectric ceramic materials in combination with second phases of different physical properties (e.g. Pb(Zr, Ti)O3-polymer composites). Furthermore,
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Phenomenological Theory of Ferroelectric Ceramics
The Journal of the Acoustical Society of America, 1953A ferroelectric ceramic represents in its virgin state, mildly idealized, a three-dimensionally isotropic continuum; in the polarized state, however, a two-dimensionally isotropic one. A general conservative medium of the latter type has ten independent adiabatic elastodielectric parameters.
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Elastocaloric effect in ferroelectric ceramics
Applied Physics Letters, 2015Elastocaloric effect has been experimentally demonstrated in bulk (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 polycrystalline ferroelectric material. Predictions were made using Maxwell's relationship for elastocaloric effect. A maximum elastocaloric effect of 1.55 K was observed for an initial material temperature of 340 K and applied compressive stress of 0–250 MPa
Satyanarayan Patel +2 more
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Ferroelectric ceramic memory devices
1964 International Electron Devices Meeting, 1964This paper discusses the information storage characteristics of an improved lead zirconate-lead titanate ferroelectric ceramic composition. The memory elements discussed are ceramic disc resonators operated in the radial extensional mode and utilizing small-signal, nondestructive readout of the remanent polarization state.
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Ferroelectric ceramics in a pyroelectric accelerator
Applied Physics Letters, 2015The applicability of polarized ferroelectric ceramics as a pyroelectric in a pyroelectric accelerator is shown by experiments. The spectra of X-ray radiation of energy up to tens of keV, generated by accelerated electrons, have been measured on heating and cooling of the ceramics in vacuum.
V. I. Volkov +4 more
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Thermodynamic Theory of Ferroelectric Ceramics
Physical Review, 1957A review of theories of ferroelectricity and of experimental data on ferroelectric ceramics leads to the conclusion that an analytic theory of such ceramics on microscopic basis does not seem feasible. A thermodynamic continuum theory is developed here, which is based on the postulated isomorphism, relevant to small signals only, between a polarized ...
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Relaxor ferroelectric-based ceramics
2010Ferroelectric relaxor characteristics are discussed in conjunction with the disordered arrangement of the constituent ions. Dielectric properties are characterized by giant and temperature-insensitive dielectric constants and large frequency dependence (referred to as “dielectric relaxation”).
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Ferroelectric Ceramics: History and Technology [PDF]
Journal of the American Ceramic Society, 1999 Ferroelectric ceramics were born in the early 1940s with the discovery of the phenomenon of ferroelectricity as the source of the unusually high dielectric constant in ceramic barium titanate capacitors. Since that time, they have been the heart and soul of several multibillion dollar industries, ranging from high‐dielectric‐constant capacitors to ...
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Ferroelectric ceramics research in china
Ferroelectrics, 1981Abstract The activities of ferroelectric ceramics research in China are introduced. Besides the conventional barium titanate and lead zirconate titanate ceramics, the induced phase transition in PZT, the (Ba1-XSrx)2NaNb5O15,(Na1-XLiX)NbO3 system, the hot forging of Bi4(PbXSr1-X)Ti4O15, the mixed oxide system of the low sintering temperature are ...
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Mechanical strength of ferroelectric ceramics
Ferroelectrics, 1978Strength characteristics of ferroelectric ceramics possessing various internal biasing field values have been studied and the relation between mechanical strength and the ferroelectric state of the material has been determined. Anisotropy of the polarized ferroelectric ceramics mechanical strength has been studied.
A. A. Grekov, S. O. Kramarov
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