Results 1 to 10 of about 18,116 (135)
Absence of ferroelectricity in BiMnO3 ceramics [PDF]
Journal of Applied Physics, 2012 We performed factor-group analysis of all phonons in possible monoclinic C2/c and C2 structures of BiMnO3 and compared it with our experimental infrared and Raman spectra. We conclude that the crystal structure is centrosymmetric C2/c in the whole investigated temperature range from 10 to 550 K, therefore BiMnO3 cannot be ferroelectric.
Veronica Goian +6 more
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Precipitation Hardening in Ferroelectric Ceramics [PDF]
Advanced Materials, 2021 AbstractDomain wall motion in ferroics, similar to dislocation motion in metals, can be tuned by well‐concepted microstructural elements. In demanding high‐power applications of piezoelectric materials, the domain wall motion is considered as a lossy hysteretic mechanism that should be restricted.
Changhao Zhao +10 more
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Acoustic microscopy of ferroelectric ceramics
Journal of Materials Science, 1982 Ferroelectric ceramics have been observed in an acoustic microscope. The images demonstrate the ability of the microscope to image elastic properties and to penetrate opaque layers.
Yin, Q, Ilett, C, Briggs, G
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Relaxor Behaviour in Ferroelectric Ceramics [PDF]
, 2012 Ferroelectric materials are commonly characterized by high dielectric permittivity values [1]. Usually, for the well-known ‘normal’ ferroelectrics the temperature of the maximum real di‐ electric permittivity (Tm) corresponds to the ferroelectric-paraelectric (FE-PE) phase transi‐ tion temperature (TC) [2].
O. García-Zaldívar +3 more
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Dispersion of Switching Processes in Ferroelectric Ceramics [PDF]
Advances in Condensed Matter Physics, 2017 The influence of the switching processes on self-heating of ferroelectric PZT ceramics samples was studied in high-amplitude sine and meander electric fields in a wide frequency range of 50 to 1500 Hz. It is shown that the linear dependence of the self-heating temperature on the electric field frequency is observed only in low-frequency region.
O. V. Malyshkina +2 more
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Nature of Aging in Ferroelectric Ceramics [PDF]
Journal of the American Ceramic Society, 1972 openaire +2 more sources
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Fracture of ferroelectric ceramics
Ferroelectrics, 1983Abstract This paper surveys the temperature, microstructural and environmental variations of the fracture properties of ferroelectric ceramics. Earlier work shows that fracture toughness decreases on heating through the Curie temperature. There is also anomalous behavior in the strength at small crack sizes, indicative of a grain size effect.
R. C. Pohanka +3 more
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Coulomb Microexplosions of Ferroelectric Ceramics
Physical Review Letters, 2008Energetic neutral and extreme ultraviolet emission initiated by the dense plasma propagation along a ferroelectric surface has been found. It was shown that the emission of neutrals is characterized by a large divergence and velocities up to 7 x 10(7) cm/s.
Ya. E. Krasik +3 more
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