Authors: Jennifer E Ni Eldon D Case Jeffrey S Sakamoto Ezhiyl Rangasamy Jeffrey B Wolfenstine
Publish Date: 2012/07/06
Volume: 47, Issue: 23, Pages: 7978-7985
Abstract
Cubic garnet Li624La3Zr2Al024O1198 LLZO is a candidate material for use as an electrolyte in Li–Air and Li–S batteries The use of LLZO in practical devices will require LLZO to have good mechanical integrity in terms of scratch resistance hardness and an adequate stiffness elastic modulus In this paper the powders were fabricated by powder processing of cast ingots All specimens were then densified via hot pressing The room temperature elastic moduli Young’s modulus shear modulus bulk modulus and Poisson’s ratio and hardness were measured by resonant ultrasound spectroscopy and Vickers indentation respectively For volume fraction porosity P the Young’s modulus was 1498 ± 04 GPa P = 003 and 1326 ± 02 GPa P = 006 The mean Vickers hardness was 63 ± 03 GPa for P = 003 and 52 ± 04 for P = 006
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