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?????????????????????????poolarization????????????????????????surface charge density?? ????????????????????r???????w??????O?????s????????r??????????@?????????????????????a???????????????????þŸ?@?N?????????a???O????F??Q?ïA?????§¹???????????§¹?????|????C§Ö???D?????????^??? The change in polarization appears as a variation of surface charge density upon the crystal faces, i.e. as a variation of the electrical field extending between the faces, since the units of surface charge density and polarization are the same, [C/m2] = [Cm/m3]. However, piezoelectricity is not caused by a change in charge density on the surface, but by dipole density in the bulk. |
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2Â¥2012-11-01 10:12:15
liang_2004
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4Â¥2012-11-05 06:57:56
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5Â¥2012-11-05 17:48:53













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