Rapid Sintering of Li2O-Nb2O5-TiO2 Solid Solution by Air Pressure Control and Clarification of Its Mechanism
| Autor: | Konatsu Kamimoto, Takahisa Yamamoto, Hiromi Nakano, Yoshio Furuta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
crystal structure
Materials science Annealing (metallurgy) Scanning electron microscope Analytical chemistry Sintering 02 engineering and technology 010402 general chemistry rapid sintering 01 natural sciences lcsh:Technology General Materials Science Spectroscopy lcsh:Microscopy lcsh:QC120-168.85 Atmospheric pressure lcsh:QH201-278.5 lcsh:T oxide materials 021001 nanoscience & nanotechnology 0104 chemical sciences X-ray diffraction Transmission electron microscopy lcsh:TA1-2040 X-ray crystallography TEM HAADF-STEM lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 Solid solution |
| Zdroj: | Materials, Vol 11, Iss 6, p 987 (2018) Materials Volume 11 Issue 6 |
| ISSN: | 1996-1944 |
| Popis: | We first successfully synthesized Li1+x&minus yNb1&minus x&minus 3yTix+4yO3 (LNT) solid solutions (0.13 &le x &le 0.18, 0 &le y &le 0.06) rapidly at 1373 K for one hour under 0.35 MPa by the controlling of air pressure using an air-pressure control atmosphere furnace. The composition is a formation area of a superstructure for LNT, in which the periodical intergrowth layer was formed in the matrix, and where it can be controlled by Ti content. Therefore, the sintering time depended on Ti content, and annealing was repeated for over 24 h until a homogeneous structure was formed using a conventional electric furnace. We clarified the mechanism of the rapid sintering using various microscale to nanoscale characterization techniques: X-ray diffraction, a scanning electron microscope, a transmission electron microscope (TEM), a Cs-corrected scanning TEM equipped with electron energy-loss spectroscopy, and X-ray absorption fine structure spectroscopy. |
| Databáze: | OpenAIRE |
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