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Temperature-dependent dielectric anomalies in powder aerosol deposited ferroelectric ceramic films

Journal of Materiomics 2022年第6期8卷 1239-1250页

作者： Udo Eckstein Jorg Exner andreja bencan golob Katarina Ziberna Goran Drazic Hana Ursic Haiko Wittkamper Christian Papp Jaroslaw Kita Ralf Moos Kyle G.Webber Neamul H.Khansur Department of Materials Science and Engineering Friedrich-Alexander-Universit€at Erlangen-NürnbergGermany Department of Functional Materials University of BayreuthGermany Electronic Ceramics Department Jozef Stefan InstituteLjubljanaSlovenia Department of Materials Chemistry National Institute of ChemistryLjubljanaSlovenia Department of Chemistry and Pharmacy Friedrich-Alexander-Universit€at Erlangen-NürnbergGermany

Room-temperature fabrication of functional ceramic films using powder aerosol deposition(AD)is important for practical ***,the as-processed ferroelectric films show unusual temperature-dependent dielectric response,including enhanced conductivity in the as-processed state and subsequent significant increase in the permittivity following heat *** this work,we investigate the influence of the residual internal stresses developed during the high-impact consolidation process on the dielectric ***,the recombination of charged defects generated during deposition is driven by the temperature and the atmospheric condition during the heat treatment as well as the carrier gas type used during *** treatment up to 500℃ in different atmospheres was used to tune the dielectric and ferroelectric response,highlighting that irrespective of the type of carrier gas,AD deposition process induces charged defects in polar oxide ceramics that can be reduced through heat-treatment far-below their bulk sintering *** electromechanical properties are contrasted to in-situ heating scanning transmission electron microscopy to observe possible local effects,such as crystallization,grain growth,crystal defect structure,or grain *** addition X-ray diffraction and X-ray photoelectron spectroscopy studies were conducted to gain insight into the effect of annealing on the crystal structure and local moisture adsorption.

关键词： Aerosol deposition Functional ceramic thick films Energy storage Structural characterization

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