Enhanced Grain Orientation in Pb(Zr,Ti)O3 Powder-Modified SrBi2Ta2O9 Ferroelectric Ceramics
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Jingsong Liu
Abstract
Pb(Zr,Ti)O3 (PZT) powder modified SrBi2Ta2O9 (SBT) ceramics, hereafter called SBT-PZT, were prepared by the solid phase synthesis method. With the aid of atomic force microscopy and x-ray diffractometry, the SBT-PZT ceramics were found to exhibit an enhanced c-axis orientation compared with SBT ceramics. Ferroelectric and dielectric properties of SBT-PZT ceramics were revealed to be anisotropic by relevant measurements. Because of differences in heteropolar valence and ionic radius between SBT and PZT, the PZT may be introduced into SBT as a heterogeneous system and embedded in the SBT grain boundaries. The large differences in crystal structures between SBT and PZT were proposed to be responsible for the SBT-PZT grain orientation mechanism. Obviously, the grain orientation resulted in electrical anisotropies of SBT-PZT ceramic. The internal stress, which was induced by heterogeneous system doping, was considered to affect the polarization reversal of SBT-PZT ceramics.
Kurzfassung
Pb(Zr,Ti)O3 (PZT) Pulver-modifizierte SrBi2Ta2O9 (SBT) Keramiken, im folgenden SBT-PZT genannt, werden mittels der Festphasensynthetik hergestellt. Mit Hilfe der Rasterkraftmikroskopoie und der Röntgendiffratometrie wurde ermittelt, dass SBT-PZT-Keramiken eine C-Achsen-Orientierung gegenüber SBT-Keramiken aufweisen. Die ferroelektrischen und die dielektrischen Eigenschaften von SBT-PZT-Keramiken stelleten sich in den entsprechenden Messungen als anisotrop heraus. Aufgrund des Unterschiedes in der heteropolaren Valenz und dem Ionenradius zwischen SBT und PZT könnte das PZT in das SBT als heterogenes System eingebracht worden sein und in den SBT-Korngrenzen eingelagert sein. Die großen Unterschiede in der Kristallstruktur zwischen SBT und PZT werden als Ursache für den Mechanismus für die SBT-PZT-Kornorientierung angenommen. Offensichtlich führt die Kornorientierung zu den elektrischen Anisotropien der SBT-PZT Keramik. Es wurde angenommen, dass die innere Spannung, die durch das heterogene System-Doping entstanden ist, die Umkehrung der Polarisierung der SBT-PZT-Keramiken beeinflusst.
References
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Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- Mechanische Charakterisierung ultraschallgeschweißter Aluminium/CFK-Verbunde bei automobilrelevanten Temperaturen und Prüfgeschwindigkeiten
- Pressure Resistance of Glass Capillaries for Hydrogen Storage
- Investigations on Joining Surface Hardened Steels by Friction Welding
- In-Situ Crack Detection Using Thermo Elastic Stimulated Lock-In Thermography
- Enhanced Grain Orientation in Pb(Zr,Ti)O3 Powder-Modified SrBi2Ta2O9 Ferroelectric Ceramics
- Effects of Binder and Water Contents on Extrusion Behavior of Zeolite
- Temperature Distribution of Multipass TIG Welded AISI 304L Stainless Steel
- The Indentation Size Effect on the Micro-Hardness of Sea Mollusc Shell Structures
- Fabrication and Characterization of SiC Preforms for Metal Matrix Composites
- Prediction of Fiber/Matrix Debonding Kinetics in Glass Fibre Reinforced Polyoximethylene under Creep
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