High-temperature X-ray analysis of phase evolution in lithium ion conductor Li{sub 1.5}Al{sub 0.5}Ge{sub 1.5}(PO{sub 4}){sub 3}

Journal Article · Sat Jun 15 04:00:00 EDT 2013 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2013.03.012· OSTI ID:22285051

He, Kun; Wang, Yanhang; Zu, Chengkui; Liu, Yonghua; Zhao, Huifeng; Chen, Jiang; Han, Bin; Ma, Juanrong

Series of Li{sub 1.5}Al{sub 0.5}Ge{sub 1.5}(PO{sub 4}){sub 3} glass ceramic samples were prepared in this work through the change of heat treatment temperature from 650 to 1050 °C. The structures of glass ceramic samples were characterized by means of high temperature X-ray diffraction and Field Emission Scanning Electron Microscope. And the lithium ionic conductivity was analyzed through AC impedance spectroscopy. Through heat treatment at 850 °C for 4 h for the base glass sample, we obtained a maximum conductivity of 5.8 × 10{sup −4} S/cm at room temperature. - Graphical Abstract: High temperature X-ray diffraction (HT-XRD) and Rietveld refinement of Li{sub 1.5}Al{sub 0.5}Ge{sub 1.5}(PO{sub 4}){sub 3} (LAGP) glass-ceramics were recorded to investigate the phase transformation, cell parameters and the mass fraction of each crystal phase, which occur in the glass to glass-ceramics process during different crystallization temperatures. The relationship between the average grain size and conductivity that originate from and relate to the crystallization temperature was analyzed by SEM micrograph and AC impedance spectroscopy. - Highlights: • Li{sub 1.5}Al{sub 0.5}Ge{sub 1.5}(PO{sub 4}){sub 3} glass-ceramics were prepared from as-prepared glass. • The phases decomposition and mass fraction of each phase were analyzed by HT-XRD. • Conductivity is relate to grain size that influenced by crystallization temperature.

• OSTI ID: 22285051
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 80; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
CRYSTALLIZATION
CRYSTALS
DECOMPOSITION
GLASS
GRAIN SIZE
IONIC CONDUCTIVITY
LITHIUM IONS
PHOSPHATES
SCANNING ELECTRON MICROSCOPY
X RADIATION
X-RAY DIFFRACTION