Conduction Properties of Na+-ion Implanted Glass-Ceramics in the System Na2O-R2O3-P2O5-SiO2 (R=Rare Earth)

1996 ◽  
Vol 453 ◽  
Author(s):  
Toshinori Okura ◽  
Miki Tanaka ◽  
Giichi Sudoh
Keyword(s):  
Rare Earth ◽  
Ionic Conductivity ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Superionic Conductors ◽  
Optimum Conditions ◽  
Phosphorus Containing ◽  
Conduction Properties ◽  
Ion Implanted

AbstractThe glass-ceramics of the phosphorus containing Na5RSi4O12type (R=rare earth) Na+-superionic conductors (Narpsio-V) in the system Na2O-Sm2O3-P2O5-SiO2 were prepared by crystallization of glasses with the composition Na3+3x-ySm1-xPySi3-yO9. The optimum conditions for crystallization were discussed with reference to the conduction properties and the preparation of uncracked bulky glass-ceramic Narpsio-V. The ionic conductivity of the glass-ceramic Na3.9Sm0.6P0.3Si2.7O9 at 300°C was drastically enhanced from 2.38×10-2 S/cm to 7.15×10-2 S/cm upon implantation of 200 keV Na+ ions to a fluence of 1 × 1015 cm-2.

NMR studies of Li mobility in NASICON-type glass-ceramic ionic conductors with optimized microstructure

2019 ◽  
Vol 7 (23) ◽  
pp. 13968-13977 ◽  
Author(s):  
Anastasia Vyalikh ◽  
Marc Schikora ◽  
Kaspar P. Seipel ◽  
Max Weigler ◽  
Matthias Zschornak ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Ionic Conductors ◽  
Nmr Studies ◽  
Nasicon Type ◽  
Li Content

Increase in grain connectivity and Li content improves ionic conductivity in Y-modified LAGP glass-ceramics.

scholarly journals CONDUCTION PROPERTIES OF He+-ION IMPLANTED Na5SmSi4O12-TYPE GLASS-CERAMICS

2004 ◽  
Vol 17 (0) ◽  
pp. 91-94 ◽  
Author(s):  
Toshinori Okura ◽  
Hideki Monma ◽  
Kimihiro Yamashita
Keyword(s):  
Glass Ceramics ◽  
Conduction Properties ◽  
Ion Implanted

Rare-earth Activated Glass and Glass-Ceramic for Neutron Detection

2012 ◽  
Vol 1471 ◽  
Author(s):  
Wei Dai ◽  
Henry Marcacci ◽  
Brendan Lynch ◽  
Hisham Menkara ◽  
Brent Wagner ◽  
...  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Neutron Detection ◽  
Aluminosilicate Glass ◽  
Transparent Glass ◽  
Glass Matrices ◽  
Quench Method

ABSTRACTNeutron detection scintillators based on rare-earth activated transparent glass and glass-ceramics are reported. Ce3+ doped gadolinium halides in 6LiF modified aluminosilicate glass matrices were synthesized by a melt-quench method followed by annealing. Their optical properties and alpha, neutron scintillation performance were investigated and compared to conventional 6Li-based scintillating glass.

Crystallization and sodium-ion conduction properties of glass–ceramic solid solutions of Na5FeSi4O12 and Na4ZrSi4O12

2020 ◽  
pp. 2141001
Author(s):  
Koji Kawada ◽  
Kimihiro Yamashita ◽  
Toshinori Okura
Keyword(s):  
Solid Solutions ◽  
Glass Ceramic ◽  
Single Phase ◽  
Glass Ceramics ◽  
Ionic Conductivities ◽  
Sodium Ion ◽  
Conduction Path ◽  
Text Type ◽  
Conductive Glass ◽  
Conduction Properties

This study focused on the effect of Zr-inclusion on Na[Formula: see text] conduction properties of the newly developed glass–ceramic solid solutions of Na5FeSi4O[Formula: see text] and Na4ZrSi4O[Formula: see text]. We experimentally confirmed formation of an all proportional solid solution in the range of [Formula: see text]= 0 and 1.0 with the composition Na[Formula: see text]Fe[Formula: see text]Zr[Formula: see text]Si4O[Formula: see text]. Glass–ceramic with a fast Na[Formula: see text]-conducting Na5YSi4O[Formula: see text]-type single phase was obtained in all the solid solutions. The conduction properties of the glass–ceramics were improved with increasing content of Zr, and Na4ZrSi4O[Formula: see text] was the most conductive glass–ceramic. The ionic conductivities were as high as 1.9 × 10[Formula: see text] S cm[Formula: see text] and 9.3 × 10[Formula: see text] S cm[Formula: see text] at temperatures of 25[Formula: see text]C and 300 [Formula: see text]C, respectively. The improved conductivity was attributed to the expansion of the conduction path by larger Zr ions replacing FeO6 octahedra.

Sol–gel-derived transparent silica–(Gd,Pr)PO4 glass-ceramic narrow-band UVB phosphors

2018 ◽  
Vol 47 (35) ◽  
pp. 12085-12091
Author(s):  
Mayu Suda ◽  
Ryosui Nakagawa ◽  
Kiyoshi Kanamura ◽  
Koichi Kajihara
Keyword(s):  
Rare Earth ◽  
Quantum Efficiency ◽  
Glass Ceramic ◽  
External Quantum Efficiency ◽  
Narrow Band ◽  
Internal Quantum Efficiency ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Rare Earth Ions

Transparent sol–gel-derived silica–(Gd,Pr)PO4 glass-ceramics free from inert rare-earth ions exhibit narrow-band UVB photoluminescence from Gd3+ ions at ∼313 nm with internal quantum efficiency close to unity and external quantum efficiency higher than 0.9 under excitation into the 5d state of Pr3+ ions.

scholarly journals Structure, luminescence and temperature sensing in rare earth doped glass ceramics containing NaY(WO4)2 nanocrystals

RSC Advances ◽  
2018 ◽  
Vol 8 (14) ◽  
pp. 7679-7686 ◽  
Author(s):  
Zeshang Zou ◽  
Ting Wu ◽  
Hao Lu ◽  
Yuyuan Tu ◽  
Shilong Zhao ◽  
...  
Keyword(s):  
Rare Earth ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Temperature Sensing ◽  
Sensing Properties ◽  
Doped Glass ◽  
Rare Earth Doped ◽  
Rare Earth Doped Glass

A novel rare earth doped glass ceramic containing NaY(WO4)2 nanocrystals was fabricated and its temperature sensing properties were investigated.

scholarly journals Enhanced photorefractivity and rare-earth photoluminescence in SnO2 nanocrystals-based photonic glass-ceramics

2021 ◽  
Vol 255 ◽  
pp. 05001
Author(s):  
Thi Ngoc Lam Tran ◽  
Anna Szczurek ◽  
Stefano Varas ◽  
Cristina Armellini ◽  
Alessandro Carpentiero ◽  
...  
Keyword(s):  
Rare Earth ◽  
Glass Ceramic ◽  
Energy Efficient ◽  
State Of The Art ◽  
Writing Process ◽  
Semiconductor Nanocrystals ◽  
Glass Ceramics ◽  
Transparent Glass ◽  
Sno2 Nanocrystals ◽  
Photonic Glass

This work presents state of the art rare-earth activated SnO2 nanocrystals - based transparent glass-ceramics. With combined enhancements in both photorefractivity and rare-earth photoluminescence, the glass-ceramic has unique benefits as a lasing material. It exhibits high photorefractivity with UV induced refractive index modifications in the order of 10-3. Exploiting its high photorefractivity, optical gratings are fabricated on the glass-ceramic under an energy-efficient direct UV writing process. Furthermore, SnO2 semiconductor nanocrystals are also employed as efficient rare-earth sensitizers enhancing drastically the rare-earth photoluminescence.

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