Download Ferroelectric Devices (Materials Engineering, 16) by Kenji Uchino PDF

By Kenji Uchino

A accomplished creation to the basics of ferroelectrics, together with to be had fabrics, machine designs, drive/control recommendations, and crucial purposes - interpreting high-permittivity dielectrics, piezoelectric units, pyroelectric sensors, and electro-optic units. It makes a speciality of hugely adaptive polycrystalline ceramics and different fabrics utilized in thin/thick movie units. The publication positive factors the author's particular equipment improvement procedure.

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Additional resources for Ferroelectric Devices (Materials Engineering, 16)

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2, the stress tensoris represented as 0 0 0 Using the transformation matrixA calculate Ax-A"~,and verify that the above-stressis equivalent toa pure shear stress in the original (non-prime) coordinates. Application of a pair of stresses X and . Notethat a shearstress is equivalentto a combination of 3 extensional and c o n ~ a c t i o nstresses. ~ an extensio~alastress ntly s i ~ i diagonal l ~ e ng, withoutthe co~trac~on along the 3' d ~ e c ~ o n , an 0 0 d3 l 0 0 31 is t r a ~ s ~ o into ~ed 0 0 d33 0 dl5 0 0 0 0 0 0 0 dl5 0 0 0 15 0 0 0 0 0 0 is inducedunderan ate exhibits a cubic crystal symne does not show ~ i e ~ o e l ~ t r i c iHo ty.

28) where C is taken as a positive constant called the Curie-Weiss constant and To is equal to or lower than the actual transition temperature Tc (Curie tempera~e). The temperaturedependence of a is relatedon amicroscopicleveltothetemperature dependence of theionicpolarizabilitycoupledwiththermalexpansion andother effects of a n h ~ o n ilattice c interactions. 2. When p ispositive, y is oftenneglectedbecausenothingspecial term. 29) - so that either PS = 0 or Ps2 = (To T)/p EO C. For T >To, theuniquesolution PS = 0 is obtained.

1) d andforall c r y s ~ l o ~ a ppoint ~c Suppose thata shear stressis applied to a square crystal and the crystal is deformed as illus~atedin Fig. 1. Calculate the induced strainx5 (= 2x3 1). 1 Shear stress andstrain c o n ~ ~ u r a ~ o n . 017. 31 at~~matica~ Tr~atm0ntof F 0 r r o 0 ~ ~ ~ c s T~c~ic wit p u p 1 .. . 3 (~ontinued)~ i e z o e l e c ~ c c o e f ~ c ime n t . . * . . Electro~t~ctive coe~ficie~t t b . . . X. * 34 Chapter 2 continue^) Electrostrictive coefficient m a ~ x .

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