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3 rezultatima
Ab initio energetics of lanthanum substitution in ferroelectric bismuth titanate.
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Using first principles calculations and atomistic thermodynamics the bulk and defect properties of orthorhombic bismuth titanate (Bi₄Ti₃O₁₂) and bismuth lanthanum titanate (Bi₃.₂₅La₀.₇₅Ti₃O₁₂) have been investigated. Heats of formation, valid chemical conditions for synthesis, lanthanum substitution
Direct thermal to electrical energy conversion using 9.5/65/35 PLZT ceramics in the ergodic relaxor phase.
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This paper reports on direct thermal to electrical energy conversion by performing the Olsen cycle on 9.5/65/35 lead lanthanum zirconate titanate (PLZT). The Olsen cycle consists of two isothermal and two isoelectric field processes in the electric displacement versus electric field diagram. It was
Lifetime prediction of CAD/CAM dental ceramics.
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The dynamic fatigue method was used to obtain subcritical crack growth parameters n and A for a commercial feldspathic dental porcelain and for a lanthanum-glass-infiltrated alumina glass ceramic. Five stress rates d sigma/dt ranging from 50 to 0.01 MPa s(-1) were applied. The inert strength values
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