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Rapid Synthesis of Li2O-(Nb/Ta)2O5-TiO2 Solid Solution Having Superstructure by Smart Processing Techniques

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Abstract:

We successfully synthesized Li1+x-yM1-x-3yTix+4yO3 solid solutions (M = Nb or Ta, LMT, 0.07 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.175) that have a superstructure. The materials formed a superstructure known as the M-phase, which is formed by the periodical insertion of an intergrowth layer in a matrix having a trigonal structure. The homogeneous and periodical structure of M-phase in LNT needed to sinter at 1393 K for 40 h-200 h using a conventional electric furnace. In order to form the homogeneous intergrowth layers rapidly, millimeter-wave or air-pressure control atmos furnaces were also used as smart processing techniques. We concluded that atomic diffusion was promoted in the useful reaction-fields: millimeter-wave radiation or high oxygen pressure.

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Periodical:

Materials Science Forum (Volume 941)

Pages:

2006-2010

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.941.2006

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Online since:

December 2018

Authors:

Hiromi Nakano*

Keywords:

Oxide, Rapid Synthesis, Superstructure, TEM, X-Ray Diffraction

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