Cold sintered composites consisting of PEEK and metal oxides with improved electrical properties via the hybrid interfaces

The manipulation of interfacial structures offers an effective route to improve the physical and chemical properties of materials. However, it is challenging to design ceramic-based composites with hybrid interfaces involved with organics and inorganics through the conventional sintering technique, due to the incompatibility of these materials at high temperatures. Here, we propose a strategy to integrate poly-ether-ether-ketone together with several metal-oxide additives into zinc oxide (ZnO) to form composite varistors via cold sintering process. Nanoscale layers of hybrid additives are dispersed between densified ZnO grain structures forming Schottky barriers, which dramatically improves the electrical properties of the resulted composites. Compared with pure ZnO, the breakdown electric field at 0.1 mA mm^(−2) reaches over 13 kV mm^(−1). Particularly, the composite shows a switch-like effect similar with switching devices, with an extraordinarily high nonlinear coefficient of 375. In addition, the elastic module decreases with the addition of PEEK. Given the flexibility in the dopants of polymers and metal oxides, this work provides a unique route to design composite materials with superior performances.

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Work Title Cold sintered composites consisting of PEEK and metal oxides with improved electrical properties via the hybrid interfaces
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Open Access
Creators
  1. Mingming Si
  2. Jing Guo
  3. Jianyu Hao
  4. Xuetong Zhao
  5. Clive A. Randall
  6. Hong Wang
Keyword
  1. Inorganic-organic composites
  2. Cold sintering process
  3. Zinc oxide
  4. Dielectrics
  5. Varistors
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Composites Part B: Engineering
Publication Date September 28, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.compositesb.2021.109349
Deposited August 02, 2022

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Version 1
published

  • Created
  • Added Guo-CompositesPtB-Dec2021.pdf
  • Added Creator Mingming Si
  • Added Creator Jing Guo
  • Added Creator Jianyu Hao
  • Added Creator Xuetong Zhao
  • Added Creator Clive A. Randall
  • Added Creator Hong Wang
  • Published
  • Updated Keyword, Description, Publication Date Show Changes
    Keyword
    • Inorganic-organic composites, Cold sintering process, Zinc oxide, Dielectrics, Varistors
    Description
    • <p>The manipulation of interfacial structures offers an effective route to improve the physical and chemical properties of materials. However, it is challenging to design ceramic-based composites with hybrid interfaces involved with organics and inorganics through the conventional sintering technique, due to the incompatibility of these materials at high temperatures. Here, we propose a strategy to integrate poly-ether-ether-ketone together with several metal-oxide additives into zinc oxide (ZnO) to form composite varistors via cold sintering process. Nanoscale layers of hybrid additives are dispersed between densified ZnO grain structures forming Schottky barriers, which dramatically improves the electrical properties of the resulted composites. Compared with pure ZnO, the breakdown electric field at 0.1 mA mm<sup>−2</sup> reaches over 13 kV mm<sup>−1</sup>. Particularly, the composite shows a switch-like effect similar with switching devices, with an extraordinarily high nonlinear coefficient of 375. In addition, the elastic module decreases with the addition of PEEK. Given the flexibility in the dopants of polymers and metal oxides, this work provides a unique route to design composite materials with superior performances.</p>
    • <p>The manipulation of interfacial structures offers an effective route to improve the physical and chemical properties of materials. However, it is challenging to design ceramic-based composites with hybrid interfaces involved with organics and inorganics through the conventional sintering technique, due to the incompatibility of these materials at high temperatures. Here, we propose a strategy to integrate poly-ether-ether-ketone together with several metal-oxide additives into zinc oxide (ZnO) to form composite varistors via cold sintering process. Nanoscale layers of hybrid additives are dispersed between densified ZnO grain structures forming Schottky barriers, which dramatically improves the electrical properties of the resulted composites. Compared with pure ZnO, the breakdown electric field at 0.1 mA mm^(−2) reaches over 13 kV mm^(−1). Particularly, the composite shows a switch-like effect similar with switching devices, with an extraordinarily high nonlinear coefficient of 375. In addition, the elastic module decreases with the addition of PEEK. Given the flexibility in the dopants of polymers and metal oxides, this work provides a unique route to design composite materials with superior performances.</p>
    Publication Date
    • 2021-12-01
    • 2021-09-28
  • Updated