Journal
CERAMICS INTERNATIONAL
Volume 46, Issue 10, Pages 17010-17017Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.03.286
Keywords
Tape calendering; Mechanical properties; Elongation at break; Plasticizer; YSZ tape
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Funding
- Sichuan Science and Technology Program [2019YFH0177]
- talent introduction plan of Sichuan University of Science and Engineering [2016RCL36, 2016RCL37]
- opening project of Material Corrosion and Protection Key Laboratory of Sichuan Province [2017CL11]
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Aqueous tape calendering offers the advantage of a simple fabrication process, inexpensive equipment, and environmental friendliness. Polyvinyl alcohol (PVA), as a polymer, is a conventional binder for aqueous tape calendering. In this innovative work, we aim to achieve a suitable process for tape calendering, by studying mechanical properties of the PVA polymer film with a series of plasticizers. The results show that the elongation at break of the PVA film reaches a maximum of 828.26%, using a triple plasticizer of glycerol, polyethylene glycol (PEG) 200, and PEG 400. With an optimized ratio of the binder to the plasticizer, a YSZ sheet with a relative density of 98% and a conductivity of 0.043 S cm(-1) at 800 degrees C is obtained by sintering at 1400 degrees C, demonstrating comparable performance to those of the YSZ electrolytes by dry pressing. SEM reveals that the sintered YSZ body is dense, and has no visible open and closed pores. The mechanical properties characterization of the PVA polymer film adopted in this paper has instructive significant instruction for tape calendering and tape casting methods.
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