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Effect of degree of crystallographic texture on ferro- and piezoelectric properties of Ba0.85 Ca0.15 TiO3 piezoceramics

Schultheiß, Jan and Clemens, Oliver and Zhukov, Sergey and von Seggern, Heinz and Sakamoto, Wataru and Koruza, Jurij (2017):
Effect of degree of crystallographic texture on ferro- and piezoelectric properties of Ba0.85 Ca0.15 TiO3 piezoceramics.
In: Journal of the American Ceramic Society, Wiley, pp. 2098-2107, 100, (5), ISSN 00027820,
DOI: 10.1111/jace.14749,
[Online-Edition: https://doi.org/10.1111/jace.14749],
[Article]

Abstract

Crystallographic texturing is a promising approach to reduce the performance gap between randomly oriented polycrystalline piezoelectrics and perfectly oriented single crystals. Here, the influence of the degree of crystallographic texture on the electromechanical properties and their temperature stability of the lead-free perovskite ferroelectric Ba0.85Ca0.15TiO3 is investigated. Samples with a broad range of (100),(001) crystallographic texture (Lotgering factor 26%-83%) were prepared by the reactive templated grain growth method. Crystallographic and microstructural analysis have been carried out using X-ray diffraction and scanning electron microscopy, while the temperature-dependent electromechanical properties were characterized by dielectric, piezoelectric, polarization, and strain measurements. It was revealed that the total bipolar strain and the coercive field are linearly dependent on the Lotgering factor. The total bipolar strain increased by 80%, whereas the coercive field decreased by 18% due to crystallographic texturing. Likewise, the temperature stability of the electromechanical properties of the samples was found to be dependent on the degree of texture. A sample with a high degree of texture exhibited a Curie temperature of 117°C, which is 21% higher compared to a counterpart with a low degree of texture. This was related to chemical inhomogeneity and a modified internal mechanical stress state.

Item Type: Article
Erschienen: 2017
Creators: Schultheiß, Jan and Clemens, Oliver and Zhukov, Sergey and von Seggern, Heinz and Sakamoto, Wataru and Koruza, Jurij
Title: Effect of degree of crystallographic texture on ferro- and piezoelectric properties of Ba0.85 Ca0.15 TiO3 piezoceramics
Language: English
Abstract:

Crystallographic texturing is a promising approach to reduce the performance gap between randomly oriented polycrystalline piezoelectrics and perfectly oriented single crystals. Here, the influence of the degree of crystallographic texture on the electromechanical properties and their temperature stability of the lead-free perovskite ferroelectric Ba0.85Ca0.15TiO3 is investigated. Samples with a broad range of (100),(001) crystallographic texture (Lotgering factor 26%-83%) were prepared by the reactive templated grain growth method. Crystallographic and microstructural analysis have been carried out using X-ray diffraction and scanning electron microscopy, while the temperature-dependent electromechanical properties were characterized by dielectric, piezoelectric, polarization, and strain measurements. It was revealed that the total bipolar strain and the coercive field are linearly dependent on the Lotgering factor. The total bipolar strain increased by 80%, whereas the coercive field decreased by 18% due to crystallographic texturing. Likewise, the temperature stability of the electromechanical properties of the samples was found to be dependent on the degree of texture. A sample with a high degree of texture exhibited a Curie temperature of 117°C, which is 21% higher compared to a counterpart with a low degree of texture. This was related to chemical inhomogeneity and a modified internal mechanical stress state.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 100
Number: 5
Publisher: Wiley
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Electronic Materials
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 22 Mar 2017 09:48
DOI: 10.1111/jace.14749
Official URL: https://doi.org/10.1111/jace.14749
Funders: Funded by Deutsche Forschungsgemeinschaft. Grant Numbers: KO 5100/1-1, SE 941/19-1, CL 551/2-1
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