Unique crystal structures and their applications as materials for Li1+-M1--3Ti+4O3 (M = Nb or Ta, 0.07 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.175)

Nakano, Hiromi

doi:10.1016/j.apt.2019.04.034

Cited by 3 publications

(2 citation statements)

References 39 publications

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“…Further, the superstructure has an anisotropic structure along the Materials Science Forum Vol. 1016 c-axis caused by the strong bonding [14]. The relationship between the eccentricity and PL intensity has reported about LTT:Eu [12].…”

Section: Resultsmentioning

confidence: 98%

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Applications of Smart Material of Li2O-(Nb/Ta)2O5-TiO2 Solid Solution Having a Unique Periodical Structure

Nakano

2021

MSF

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In the Li2O-M2O5-TiO2 system, Li1+x-yM1-x-3yTix+4yO3 (M = Nb, or Ta, 0.06 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.175 (LMT) forms a superstructure, known as smart material. The superstructure is formed by periodical insertion of a corundum-type intergrowth layer of [Ti2O3]2+ in a matrix having a trigonal structure during the grain growth. To apply this unique structure as a host material of phosphor, new phosphors doped with Mn4+ ion with a red emission colour, which had a broad peak around 685 nm excited by 493 nm. In order to improve the PL intensity, we investigated the compositions, Mn4+ ratio and crystal structure. Results showed that PL intensity was closely related to Mn4+ ratio and its crystal structure.

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Section: Resultsmentioning

confidence: 98%

“…5. It is interesting to note that the intergrowth layers are composed of Ti 3+ ions by TEM/EELS [14]. Therefore, oxygen defects were formed along the intergrowth layers in the matrix and Mn 4+ ratio decreased.…”

Section: Resultsmentioning

confidence: 99%

Applications of Smart Material of Li2O-(Nb/Ta)2O5-TiO2 Solid Solution Having a Unique Periodical Structure

Nakano

2021

MSF

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Relationship between photoluminescence intensity, Mn ion oxidation, and crystal structure of new phosphors Li-M-Ti-O:Mn4+ (M = Nb or Ta)

Nakano

Ando

2021

Materials Research Bulletin

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Fabrication and Anisotropic Electrical Property for Oriented Ceramic of Li-(Nb,Ta)-Ti-O System under High-magnetic Field

Nakano

Suzuki

Kan

2020

J. Jpn. Soc. Powder Powder Metallurgy

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The Li 1+x-y (Nb,Ta) 1-x-3y Ti x+4y O 3 (0.06 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.09) forms a unique and periodical structure as a superstructure. In this work, toward application of the unique qualities of an electro-ceramic, we fabricated oriented bulk ceramics by slip casting in a strong magnetic field of 12 T. The c-axis of the powders was aligned parallel to the magnetic field. As a result, we found anisotropic-electric properties which were caused by a superstructure with intergrowth layers of corundum-type [Ti 2 O 3 ] 2+. In the Li-Nb-Ti-O system, the Qf value parallel to the c-axis was about five times greater than that of perpendicular to the c-axis. We concluded from our analytical and simulation results that the large Qf value parallel to the c-axis was caused from a combination of two factors; one being the anisotropic electron conductivity and the other the anisotropic bonding strength in the superstructure by insertion of the intergrowth layer.

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Unique crystal structures and their applications as materials for Li1+-M1--3Ti+4O3 (M = Nb or Ta, 0.07 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.175)

Cited by 3 publications

References 39 publications

Applications of Smart Material of Li<sub>2</sub>O-(Nb/Ta)<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> Solid Solution Having a Unique Periodical Structure

Applications of Smart Material of Li<sub>2</sub>O-(Nb/Ta)<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> Solid Solution Having a Unique Periodical Structure

Relationship between photoluminescence intensity, Mn ion oxidation, and crystal structure of new phosphors Li-M-Ti-O:Mn4+ (M = Nb or Ta)

Fabrication and Anisotropic Electrical Property for Oriented Ceramic of Li-(Nb,Ta)-Ti-O System under High-magnetic Field

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Unique crystal structures and their applications as materials for Li1+-M1--3Ti+4O3 (M = Nb or Ta, 0.07 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.175)

Cited by 3 publications

References 39 publications

Applications of Smart Material of Li<sub>2</sub>O-(Nb/Ta)<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> Solid Solution Having a Unique Periodical Structure

Applications of Smart Material of Li<sub>2</sub>O-(Nb/Ta)<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> Solid Solution Having a Unique Periodical Structure

Relationship between photoluminescence intensity, Mn ion oxidation, and crystal structure of new phosphors Li-M-Ti-O:Mn4+ (M = Nb or Ta)

Fabrication and Anisotropic Electrical Property for Oriented Ceramic of Li-(Nb,Ta)-Ti-O System under High-magnetic Field

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Unique crystal structures and their applications as materials for Li1+-M1--3Ti+4O3 (M = Nb or Ta, 0.07 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.175)