Results 171 to 180 of about 803 (211)

Ionic conductivity of oxides based on Li4SiO4

Journal of Applied Electrochemistry, 1973
Lithium orthosilicate, Li4SiO4, and its solid solutions are a new group of solids of high ionic conductivity. Either Li or Si may be at least partially replaced by several other di-, tri- or tetra-valent cations. Highest conductivities were found for solid solutions with Si partially replaced by Ti; typical values were 10−3 to 10−4 Ω−1 cm−1 at 300°C ...
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Fabrication of Li4SiO4 pebbles by a sol–gel technique

Fusion Engineering and Design, 2010
Abstract Li4SiO4 pebbles are considered as candidate ceramic breeder materials in many blanket designs. In this work, Li4SiO4 pebbles with adequate sphericity were fabricated by a water-based sol–gel process using LiOH and SiO2 (aerosil) as the raw materials, which has not been reported for fabrication of Li4SiO4 pebbles previously. Thermal analysis,
Xiangwei Wu, Zhaoyin Wen, Xiaogang Xu, Yu Liu   +3 more
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Effect of sweep gas chemistry on vaporization of Li4SiO4

Journal of Nuclear Materials, 1995
Abstract Gas/solid equilibria in the system Li 4 SiO 4 D 2 D 2 O were studied by means of Knudsen effusion mass spectrometry. A Knudsen effusion mass spectrometer was modified to enable studies of reactions of hydrogen and/or water vapor with ceramic breeder materials.
Michio Yamawaki, Atsushi Suzuki, Masaru Yasumoto, Kenji Yamaguchi   +3 more
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Semi-industrial production of li4sio4 powder and spheres

Fusion Engineering and Design, 1989
This report deals with the preparation of a 70 kg batch of lithium orthosilicate. For synthesis, a technique has been selected under which the LiOH and SiO2 starting materials form a preliminary product in methanol. The resulting suspension is spray-dried after water has been substituted for alcohol.
D. Vollath, H. Wedemeyer, E. Günther, H. Elbel   +3 more
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MECHANICAL PROPERTIES AND DEHYDRATION OF Li4SiO4 PEBBLES

1993
A new concept of the Karlsruhe helium cooled ceramic breeder design is based on a mixed bed of small lithium orthosilicate pebbles of 0.1 - 0.2 mm diameter and 2 mm beryllium pebbles that serve as a neutron multiplier. Helium sweep gas flows through the bed and carries away the released tritium.
V. Schauer, M. Dalle Donne, R. Huber, B. Schmitt, G. Schumacher, H. Werle   +5 more
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Mechanical behavior of Li4SiO4 in a blanket typical geometry

Fusion Engineering and Design, 2000
The mechanical behavior of the granular ceramic breeder material is of importance for the integrity of any solid breeder blanket concept. Finite element calculations for blanket relevant conditions are performed using methods from soil mechanics. These account for volume compaction during compression and for shear failure i.e.
L Bühler, J Reimann, E Arbogast, K Thomauske   +3 more
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Synthesis and electrochemical properties of Li2S–B2S3–Li4SiO4

Solid State Ionics, 2006
Abstract New Li + ion-conductive glasses Li 2 S–B 2 S 3 –Li 4 SiO 4 were synthesized by rapid quenching, and they were transformed into glass ceramics by heat treatment. The heat treatment increased the ionic conductivities of the Li 4 SiO 4 -doped glasses, and the highest ionic conductivity observed in the system was 1.0 × 10 − 3 S cm − 1 at ...
Y SEINO, K TAKADA, B KIM, L ZHANG, N OHTA, H WADA, M OSADA, T SASAKI   +7 more
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Studies on Li2SO4-MgSO4 and Li2SO4-Li4SiO4 systems

Acta Chimica Sinica, 1986
The phase equilibria as well as the properties and crystal structures of the compounds formed in both Li2SO4-MgSO4 and Li2SO4-Li4SiO4 systems have been studied by means of x-ray diffraction technique (at high and room temperatures) as well as by the thermal analyses (DTA, DSC, TGA, etc.). In Li2SO4-MgSO4 system there exists a compound Mg4Li2(SO4)
Liang Jing-Kui, Zhang Yu-Ming
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Partial nitridation of Li4SiO4 and ionic conductivity of Li4.1SiO3.9N0.1

Ceramics International, 2018
Abstract The Li content and anion lattice of Li 4 SiO 4 were modified to improve ionic conductivity. Li 2 CO 3 and Si 3 N 4 were mixed in a ratio of Li/Si = 4.5 and heated in NH 3 at 820 °C, which resulted in the formation of the oxynitride, Li 4.1 SiO 3.9 N 0.1 . Powder X-ray diffraction analyses revealed Li 4.1 SiO 3.9 N 0.1 and Li 4 SiO 4 to
Hanseul Kim, Young-Il Kim
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Li+ ion conductivity in the system Li4SiO4Li3VO4

Journal of Solid State Chemistry, 1984
Abstract Two ranges of solid solutions were prepared in the system Li 4 SiO 4 Li 3 VO 4 : Li 4− x Si 1− x V x O 4 , 0 x ≲ 0.37 with the Li 4 SiO 4 structure and Li 3+ y V 1− y Si y O 4 , 0.18 ≲ y ≲ 0.53 with a γ structure. The conductivity of both solid solutions is much higher than that of the end members and passes through a maximum at ∼
A. Khorassani, A.R. West
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