Academic Journal
A glance at processing-microstructure-property relationships for magnetoelectric particulate PZT-CFO composites
| العنوان: | A glance at processing-microstructure-property relationships for magnetoelectric particulate PZT-CFO composites |
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| المؤلفون: | Galizia, Pietro, Baldisserri, Carlo, Mercadelli, Elisa, Capiani, Claudio, Galassi, Carmen, Algueró, Miguel |
| المساهمون: | Ministerio de Ciencia, Innovación y Universidades (España), Galizia, Pietro, Mercadelli, Elisa, Galassi, Carmen |
| بيانات النشر: | Molecular Diversity Preservation International |
| سنة النشر: | 2020 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| مصطلحات موضوعية: | Cobalt ferrite, Particulate composite, Magnetoelectric coupling, Piezoelectric, Dielectric, Grain-size effect, Sauter’s diameter, Tetragonality, Lattice parameters, Poling |
| الوصف: | [EN] In this work, we investigated the processing-microstructure-property relationships for magnetoelectric (ME) particulate composites consisting of hard ferromagnetic CoFeO (CFO) particles dispersed in a Nb-doped PbZrTiO (PZT) soft ferroelectric matrix. Several preparation steps, namely PZT powder calcination, PZT-CFO mixture milling and composite sintering were tailored and a range of microstructures was obtained. These included open and closed porosities up to full densification, PZT matrices with decreasing grain size across the submicron range down to the nanoscale and well dispersed CFO particles with bimodal size distributions consisting of submicron and micron sized components with varying weights. All samples could be poled under a fixed DC electric field of 4 kV/mm and the dielectric, piezoelectric and elastic coefficients were obtained and are discussed in relation to the microstructure. Remarkably, materials with nanostructured PZT matrices and open porosity showed piezoelectric charge coefficients comparable with fully dense composites with coarsened microstructure and larger voltage coefficients. Besides, the piezoelectric response of dense materials increased with the size of the CFO particles. This suggests a role of the conductive magnetic inclusions in promoting poling. Magnetoelectric coefficients were obtained and are discussed in relation to densification, piezoelectric matrix microstructure and particle size of the magnetic component. The largest magnetoelectric coefficient ff33 of 1.37 mV cm Oe was obtained for submicron sized CFO particles, when closed porosity was reached, even if PZT grain size remained in the nanoscale. ; This research was funded by Spanish MICINN grant number MAT2017-88788-R. ; Peer reviewed |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| تدمد: | 1996-1944 |
| Relation: | #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-88788-R/ES/SPARK PLASMA SINTERING COMO MEDIO DE PREPARACION DE MATERIALES MAGNETOELECTRICOS EN CAPAS: FASES UNICAS Y COMPOSITES MULTIFERROICOS ESTRUCTURADOS EN DISTINTAS ESCALAS/; Publisher's version; http://dx.doi.org/10.3390/ma13112592; Sí; MATERIALS 13 (2020); http://hdl.handle.net/10261/259225 |
| DOI: | 10.3390/ma13112592 |
| الاتاحة: | http://hdl.handle.net/10261/259225 https://doi.org/10.3390/ma13112592 |
| Rights: | open |
| رقم الانضمام: | edsbas.6A809F4C |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 19961944 |
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| DOI: | 10.3390/ma13112592 |