Issue 59, 2020, Issue in Progress
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RSC Advances

Electrical properties of Ca12Al14O33 synthesised through polymer assisted deposition and glass crystallization routes

Yun Lv,a   Huaibo Yi,a   Tianjie Wei,a   Junwei Liu,a   Xiangyu Xua  and  Jungu Xu ORCID logo *a  

* Corresponding authors

a MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, P. R. China
E-mail: xujungu@glut.edu.cn

Abstract

In this paper, two new methods, polymer assisted deposition (PAD) and glass crystallization (GC) methods were reported for the first time to prepare oxide ion conductor Ca12Al14O33, with their microstructures and electrical properties compared to that of a sample prepared by the traditional solid-state reaction (SSR) method. The results showed that these two new methods are effective for improving ceramic densities and oxide ion conductivities compared to the SSR method, and the ceramic prepared from the GC method in the present work possessed the highest level of ∼94% of the theoretical density and ∼1.0 × 10−3 S cm−1 at 900 °C for the bulk conductivity. A new bond valence method was applied to study the oxide ion conducting mechanism, which revealed an exchange process between the free oxide ion and the framework ion, and the wide windows connecting the Ca–Al–O framework cages were shown to be the key factor limiting oxide ion transport.

Graphical abstract: Electrical properties of Ca12Al14O33 synthesised through polymer assisted deposition and glass crystallization routes

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Article information

DOI
https://doi.org/10.1039/D0RA07082C
Article type
Paper
Submitted
17 Aug 2020
Accepted
21 Sep 2020
First published
30 Sep 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 35803-35810

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Electrical properties of Ca12Al14O33 synthesised through polymer assisted deposition and glass crystallization routes

Y. Lv, H. Yi, T. Wei, J. Liu, X. Xu and J. Xu, RSC Adv., 2020, 10, 35803 DOI: 10.1039/D0RA07082C

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