Sintering behavior and ionic conductivity of Li1.5Al0.5Ti1.5(PO4)3 synthesized with different precursors
Author:
Davaasuren Bambar12, Ma Qianli1, Heiden Alexandra von der13, Tietz Frank14
Affiliation:
1. Forschungszentrum Jülich GmbH, IEK-1: Materials Synthesis and Processing , D-52425 Jülich , Germany 2. New address: King Abdullah University of Science and Technology, Core Labs and Research Infrastructure Central Office , Thuwal , 23955-6900 , Saudi Arabia 3. New address: Forschungszentrum Jülich GmbH, Projektträger Jülich (PTJ-NMT) , D-52425 Jülich , Germany 4. Forschungszentrum Jülich GmbH, IEK-12: Helmholtz-Institute Münster , D-52425 Jülich , Germany
Abstract
Abstract
Li1.5Al0.5Ti1.5(PO4)3 (LATP) powders were prepared from different NO
x
-free precursors using an aqueous-based solution-assisted solid-state reaction (SA-SSR). The sintering behavior, phase formation, microstructure and ionic conductivity of the powders were explored as a function of sintering temperature. The powders showed a relatively narrow temperature windows in which shrinkage occurred. Relative densities of 95% were reached upon heating between 900 and 960 °C. Depending on the morphological features of the primary particles, either homogeneous and intact microstructures with fine grains of about <2 µm in size or a broad grain size distribution, micro-cracks and grain cleavages were obtained, indicating the instability of the microstructure. Consequently, the ceramics with a homogeneous microstructure possessed a maximum total ionic conductivity of 0.67 mS cm−1, whereas other ceramics reached only 0.58 mS cm−1 and 0.21 mS cm−1.
Publisher
Walter de Gruyter GmbH
Subject
Physical and Theoretical Chemistry
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