Electrical properties of Ca12Al14O33 synthesised through polymer assisted deposition and glass crystallization routes. Issue 59 (30th September 2020)

• Record Type: Journal Article
• Authors: Lv, Yun; Yi, Huaibo; Wei, Tianjie; Liu, Junwei; Xu, Xiangyu; Xu, Jungu
• Is Part Of: RSC advances. Volume 10:Issue 59(2020)
• Page Start: 35803
• Page End: 35810
• Publication Date: 2020-09-30
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra07082c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Ca12 Al14 O33 material was prepared by two new methods with optimized microstructures and improved electrical properties compared to the solid-reaction method. 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 Ca12 Al14 O33, 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.