Journal
FRONTIERS OF MATERIALS SCIENCE
Volume 6, Issue 3, Pages 216-224Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11706-012-0172-6
Keywords
lithium ionic conductor; Li5+xSrxLa3-xBi2O12; Pechini method; spark plasma sintering (SPS); ionic conductivity
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Funding
- National Natural Science Foundation of China [50702061, 10874185]
- Anhui Provincial Natural Science Foundation [090414181]
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A typical approach involving Pechini method and spark plasma sintering ( SPS) method was presented for the preparation of high density Li5+xSrxLa3-xBi2O12 (x=0,1) ceramics. Phase formation, microstructure, grain size and electrical properties of the specimens were examined using XRD, SEM and alternating current impedance spectroscopy (ACIS). Dense Li5La3Bi2O12 and Li6SrLa2Bi2O12 ceramics with pure garnet-like phase, relative density of 97% and average grain size of about 5 mu m were fabricated using this approach. The total conductivities at 298 K of Li5La3Bi2O12 and Li5La3Bi2O12 ceramics prepared by the SPS method are 5.1 x 10(-5) and 6.8 x 10(-5) S/cm, respectively, 2 times higher than that of samples prepared by the conventional sintering method.
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