Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Stephen C. Hwang"'
A polarization switching model for polycrystalline ferroelectric ceramics has been developed. It is assumed that a single ferroelectric crystallite in a ceramic, which is subjected to an electric field and/or a stress, undergoes a complete polarizati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2f89dfa7d26f2bf0e4372f0c9c3efce
https://ora.ox.ac.uk/objects/uuid:a8e82015-0a20-42f5-b9b1-61d3976ada97
https://ora.ox.ac.uk/objects/uuid:a8e82015-0a20-42f5-b9b1-61d3976ada97
Autor:
Stephen C. Hwang, Rainer Waser
Publikováno v:
Acta Materialia. 48:3271-3282
Polarization switching in a polycrystalline ferroelectric/ferroelastic ceramic is simulated with a finite element model. It is assumed that a crystallite switches if the reduction in potential energy of the polycrystal exceeds a critical energy barri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d01352a110900b7378b21099559a7da
https://doi.org/10.1016/s1359-6454(00)00092-6
https://doi.org/10.1016/s1359-6454(00)00092-6
Autor:
G. Arlt, Stephen C. Hwang
Publikováno v:
Journal of Applied Physics. 87:869-875
The Rayleigh law and a propagating switching region of a ferroelectric polycrystal are studied with a finite element model. Each crystallite, represented by a cubic element in a finite element mesh, is a single domain that switches completely without
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5501574f8bc056eee74732ac79770deb
https://doi.org/10.1063/1.371968
https://doi.org/10.1063/1.371968
Autor:
Robert M. McMeeking, Stephen C. Hwang
Publikováno v:
International Journal of Solids and Structures. 36:1541-1556
A finite element model of switching in polycrystalline ferroelastic ceramics is developed. It is assumed that a crystallite switches if the reduction in mechanically driven potential energy of the system exceeds a critical value per unit volume of sw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68dc0d4bbe3df12a4b5bac21f2ed6298
https://doi.org/10.1016/s0020-7683(98)00051-1
https://doi.org/10.1016/s0020-7683(98)00051-1
Autor:
Stephen C. Hwang, Robert M. McMeeking
Publikováno v:
Ferroelectrics. 211:177-194
A finite element model of polarization switching in polycrystalline ferroelectric ceramics is developed. A polarization switch in a ferroelectric is the reorientation of the unit cell dipole to a new crystallographic direction. It is assumed that a c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cbdede4b872636eb17f3b077ac03ba8
https://doi.org/10.1080/00150199808232342
https://doi.org/10.1080/00150199808232342
Autor:
Robert M. McMeeking, Stephen C. Hwang
Publikováno v:
Ferroelectrics. 200:151-173
The potential energy of an infinite homogeneous piezoelectric loaded body containinga single ellipsoidal transforming inhomogeneity is stated in terms of the fields in the inclusion. Explicit results are given for a piezoelectric inclusion in an isot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c2398de500eeb6401e29d82ece1e6fe
https://doi.org/10.1080/00150199708008603
https://doi.org/10.1080/00150199708008603
Publikováno v:
Acta Metallurgica et Materialia. 43:2073-2084
Ferroelectric and ferroelastic switching cause ferroelectric ceramics to depolarize and deform when subjected to excessive electric field or stress. Switching is the source of the classic butterfly shaped strain vs electric field curves and the corre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ec1cdee77dbaf5b1d8e60a2b1390b95
https://doi.org/10.1016/0956-7151(94)00379-v
https://doi.org/10.1016/0956-7151(94)00379-v
The goal of this project was to identify a viable, non-destructive methodology for the detection of cracks in electrically poled piezoelectric ceramics used in neutron generator power supply units. The following methods were investigated: Impedance S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::067cef0b6af386b68a3392c3b7552886
https://doi.org/10.2172/919173
https://doi.org/10.2172/919173
Autor:
Paul V. Plunkett, Daniel Donaciano Vigil, Julio P. Marchiondo, Stephen C. Hwang, Lorraine S. Curtis, Jimmie T. Martinez, James N. Sweet, Matthew A. Montano, Richard William Wavrik
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e20f0d1296adf0345668ede6b75909e
https://doi.org/10.2172/807058
https://doi.org/10.2172/807058
Autor:
Stephen C. Hwang, Robert M. McMeeking
Publikováno v:
SPIE Proceedings.
A finite element model of polarization switching in a polycrystalline ferroelectric/ferroelastic ceramic is developed. It is assumed that a crystallite switches if the reduction in potential energy of the polycrystal exceeds a critical energy barrier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6d3108c41331e921e61c092f83c67d3
https://doi.org/10.1117/12.388224
https://doi.org/10.1117/12.388224