The Hydrothermal Synthesis of BaTiO3 Nanotubes Arrays with Good Electrical Property

Barium titanate nanotubes arrays were synthetized by in-suit hydrothermal method using TiO2nanotubes as both template and reactant in titanium substrate. Highly ordered nanotubes arrays and the spacing between nanotubes are apparent. XRD indicates that the samples have excellent crystallization and perovskite structure. Typical ferroelectric hysteresis loop of as-formed barium titanate nanotubes arrays with remanent polarization and coercive field are 6.72 and 48.7kV/cm.

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Preparation and Properties of PZT Thin Films Produced by Decomposition of Metal Carboxylate Gels

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.121-123.195 ◽

2007 ◽

Vol 121-123 ◽

pp. 195-200 ◽

Cited By ~ 1

Author(s):

Jiu Peng Zhao ◽

C.Y. Juan ◽

Liang Sheng Qiang

Keyword(s):

Thin Films ◽

Remanent Polarization ◽

Chelating Agents ◽

Metal Carboxylate ◽

Ferroelectric Hysteresis Loop ◽

Pzt Thin Films ◽

Pzt Films ◽

Different Temperatures ◽

Ferroelectric Hysteresis ◽

Organic Gel

In this work, PZT (Zr/Ti=52/48) thin films have been prepared using aqueous organic gel method. The desired metal cations are chelated in a solution using citric acid and ethylenediaminetertraacetic acid (EDTA) as the chelating agents. The thermal decompostion of the metal carboxylate precursors gels have been studied by TG/DTA and the products derived from calcinations of the gels at different temperatures have been characterized by XRD and SEM. By heat-treatment at 650°C for 2h, PZT thin films with smooth and crack-free surface could be achieved. The thickness of each layer was 50nm. Electric properties measurement indicated that the PZT films demonstrated a ferroelectric hysteresis loop. The remanent polarization(Pr) and coercive field (Ec) were 20.7μC/cm2 and 75.5kV/cm, respectively. The dielectric constant and the dielectric loss at 100 kHz of the films were 930 and 0.045, respectively.

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EFFECT OF PROCESSING CONDITIONS ON ELECTRICAL PROPERTIES OF CaCu3Ti4O12 CERAMICS

Modern Physics Letters B ◽

10.1142/s021798491002327x ◽

2010 ◽

Vol 24 (12) ◽

pp. 1267-1273 ◽

Cited By ~ 4

Author(s):

RAMAN KASHYAP ◽

TANUJ DHAWAN ◽

PRIKSHIT GAUTAM ◽

O. P. THAKUR ◽

N. C. MEHRA ◽

...

Keyword(s):

Solid State ◽

Electrical Properties ◽

Nonlinear Behavior ◽

Ferroelectric Hysteresis Loop ◽

Processing Conditions ◽

Reaction Route ◽

Sintering Time ◽

Maximum Value ◽

Solid State Reaction Route ◽

Ferroelectric Hysteresis

CaCu 3 Ti 4 O 12 ( CCTO ) ceramics were prepared by the solid-state reaction route. Effect of sintering time was studied on the polarization (P) versus electric field (E) behavior. Unlike conventional ferroelectric hysteresis loop, PE hysteresis behavior in CCTO ceramics was observed to exhibit ferroelectric-like loop where polarization does not saturate but gives a maximum value. Remnant polarization and maximum polarization was observed to increase with sintering time. Current (I)–voltage (V) characteristics shows a nonlinear behavior making them useful for varistor applications. Coefficient of non-linearity (α) is also found to depend on sintering duration.

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