1
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Gel Synthesis of Hexaferrites Pb 1− x La x Fe 12− x Zn x O 19 and Properties of Multiferroic Composite Ceramics PZT–Pb 1− x La x Fe 12− x Zn x O 19

      research-article

      * ,

      Nanomaterials

      MDPI

      multiferroics, magnetoelectric composites, hexaferrites, gel synthesis

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          We investigated the opportunities for obtaining hexaferrites Pb 1− x La x Fe 12− x Zn x O 19 ( x = 0–1) from citrate–glycerin gel and showed that synthesis occurs via the formation of the Fe 3O 4 phase; products with a small amount of hematite impurity Fe 2O 3 can be obtained after firing at 800 to 900 °C with 0 ≤ x ≤ 0.5. If x > 0.5, perovskite-like LaFeO 3 is formed in samples, so that if x = 0.9–1, the synthesis products virtually do not contain phases with hexaferrite structures and represent a mixture of LaFeO 3, Fe 2O 3, and Fe 3O 4. Within the range of 0 ≤ x ≤ 0.5, the electrical and magnetic characteristics of hexaferrites Pb 1− x La x Fe 12− x Zn x O 19 are slightly dependent on x and have the following average values: A relative permittivity ε/ε 0 ~ 45, a dielectric loss tangent tan δ ~ 0.6, an electrical resistivity R ~ 10 9 Ohm cm, coercivity H c ~ 3 kOe, saturation magnetization M s ~ 50 emu/g, and remanent magnetization M r ~ 25 emu/g. The magnetoelectric (ME) ceramics 50 wt.% PZTNB-1 + 50 wt.% Pb 1− x La x Fe 12− x Zn x O 19 (PZTNB-1 is an industrial piezoelectric material based on lead titanate zirconate (PZT) do not contain impurity phases and have the following characteristics: Piezoelectric coefficients d 33 = 10–60 and −d 31 = 2–30 pC/N, piezoelectric voltage coefficients g 33 = 2–13 and −g 31 = 1–5 mV m/N, an electromechanical coupling coefficient K p = 0.03–0.13, magnetic parameters H c = 3–1 kOe, M s = 50–30, and M r = 25–12 emu/g. The maximum ME coupling coefficient ΔE/ΔH ~ 1.75 mV/(cm Oe) was achieved with x = 0.5.

          Related collections

          Most cited references 34

          • Record: found
          • Abstract: found
          • Article: not found

          Epitaxial BiFeO3 multiferroic thin film heterostructures.

          Enhancement of polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3, is reported. Structure analysis indicates that the crystal structure of film is monoclinic in contrast to bulk, which is rhombohedral. The films display a room-temperature spontaneous polarization (50 to 60 microcoulombs per square centimeter) almost an order of magnitude higher than that of the bulk (6.1 microcoulombs per square centimeter). The observed enhancement is corroborated by first-principles calculations and found to originate from a high sensitivity of the polarization to small changes in lattice parameters. The films also exhibit enhanced thickness-dependent magnetism compared with the bulk. These enhanced and combined functional responses in thin film form present an opportunity to create and implement thin film devices that actively couple the magnetic and ferroelectric order parameters.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramics

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Method of preparing lead and alkaline earth titanates and niobates and coating method using the same to form a capacitor

                Bookmark

                Author and article information

                Journal
                Nanomaterials (Basel)
                Nanomaterials (Basel)
                nanomaterials
                Nanomaterials
                MDPI
                2079-4991
                19 August 2020
                September 2020
                : 10
                : 9
                Affiliations
                Faculty of Chemistry, Southern Federal University, 344090 Rostov on Don, Russia; ing_a@ 123456ro.ru
                Author notes
                [* ]Correspondence: liv@ 123456sfedu.ru
                Article
                nanomaterials-10-01630
                10.3390/nano10091630
                7559289
                32825193
                c15e45a5-3265-479e-bc91-cd59062f3568
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                Categories
                Article

                Comments

                Comment on this article