Preparation of spherical particles of Li2TiO3 (with diameters below 100μm) by sol–gel process

Deptula, A.; Brykala, Marcin; Łada, W.; Olczak, Teresa; Sartowska, B.; Chmielewski, A.G.; Wawszczak, D.; Alvani, C.

doi:10.1016/j.fusengdes.2008.12.077

Cited by 43 publications

(17 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To date, much work has already been done on the fabrication of both pellets and pebbles of Li 2 TiO 3 , characterizing tritium releasing behavior and developing the database. Different techniques are routinely utilized to produce Li 2 TiO 3 nanoceramic materials, such as sol-gel [6][7][8][9][10], extrusion spherodization [11,12], wet chemical method [13], solution combustion [14], polymer solution [15] and many more. All these chemical and mettaloorganic methods have drawbacks with respect to large-scale production, reproducibility, maintenance of stoichiometry and homogeneity in composition, and furthermore require extra high-temperature calcinations.…”

Section: mentioning

confidence: 99%

Electrical properties of bulk and nano Li2TiO3 ceramics: A comparative study

et al. 2014

View full text Add to dashboard Cite

Nanocrystalline and bulk Li 2 TiO 3 having monoclinic structure were prepared by mechanical alloying as well as conventional ceramic route. Complex impedance analysis in the frequency range of 100 Hz-1 MHz over a wide range of temperature (50-500 ℃) indicates the presence of grain boundary effect along with the bulk contribution. The frequency-dependent conductivity plots exhibit power law dependence, suggesting three types of conduction in the material: low-frequency (100 Hz-1 kHz) conductivity showing long-range translational motion of electrons (frequency independent), mid-frequency (1-10 kHz) conductivity showing short-range hopping of charge carriers and high-frequency (10 kHz-1 MHz) conductivity showing conduction due to localized orientation of hopping mechanism. The electrical conductivity measurement of nanocrystalline and bulk Li 2 TiO 3 with temperature shows the negative temperature coefficient of resistance (NTCR) behavior. The activation energy (0.77 eV for nano sample and 0.88 eV for bulk sample) study shows the conduction mechanism in both samples. The low activation energies of the samples suggest the presence of singly ionized oxygen vacancies in the conduction process.

show abstract

Section: mentioning

confidence: 99%

Electrical properties of bulk and nano Li2TiO3 ceramics: A comparative study

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The role of the lithium-6 fuel in the fusion reactor is to generate tritium by the nuclear reaction (1) 6 Li (n, ␣) [1]. 6 Li + 1 n → (He + 2.1 MeV) + (T + 2.7 MeV) (1) Proposed fusion reactors (FR) are based on the following nuclear fusion reactions, where tritium is one of the key inputs.…”

Section: Introductionmentioning

confidence: 99%

“…6 Li + 1 n → (He + 2.1 MeV) + (T + 2.7 MeV) (1) Proposed fusion reactors (FR) are based on the following nuclear fusion reactions, where tritium is one of the key inputs.…”

Section: Introductionmentioning

confidence: 99%

“…Different investigators have proposed different methods for the synthesis/fabrication of Li 2 TiO 3 pebbles. The most commonly employed methods are wet process, sol-gel process and mixing of the two oxides followed by compaction and sintering [10][11][12][13][14][15]. The work performed in the last two decades in this field has been reviewed by Johnson [18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis & fabrication of lithium-titanate pebbles for ITER breeding blanket by solid state reaction & spherodization

Mandal

Shenoi

Ghosh

2010

Fusion Engineering and Design

View full text Add to dashboard Cite

“…A number of recent studies have investigated methods for the fabrication of single phase Li 2 TiO 3 and Li 4 SiO 4 pebbles from powder-form precursor materials in dry and wet processes utilising binders and different spheroidisation techniques [14][15][16][17][18][19][20]. Such methods readily allow the fabrication of pebbles with well controlled geometry, density and consistency and reprocessing by melting and by wet chemical methods has further been the subject of various research efforts [21,22].…”

mentioning

confidence: 99%

Solution based synthesis of mixed-phase materials in the Li2TiO3–Li4SiO4 system

Hanaor

Kolb

Gan

et al. 2015

Journal of Nuclear Materials

View full text Add to dashboard Cite

Abstract:As candidate tritium breeder materials for use in the ITER helium cooled pebble bed, ceramic multiphasic compounds lying in the region of the quasi-binary lithium metatitanate-lithium orthosilicate system may exhibit mechanical and physical advantages relative to single phase materials. Here we present an organometallic solution-based synthesis procedure for the low-temperature fabrication of compounds in the Li 2 TiO 3 -Li 4 SiO 4 region and investigate phase stability and transformations through temperature varied X-ray diffraction and scanning calorimetry. Results demonstrate that the metatitanate and metasilicate phases Li 2 TiO 3 and Li 2 SiO 3 readily crystallise in nanocrystalline form at temperatures below 180°C. Lithium deficiency in the region of 5% results from Li sublimation from Li 4 SiO 4 and/or from excess Li incorporation in the metatitanate phase and brings about a stoichiometry shift and product compounds with mixed lithium orthosilicate/ metasilicate content towards the Si rich region and predominantly Li 2 TiO 3 content towards the Ti rich region. Above 1150°C the transformation of monoclinic to cubic γ-Li 2 TiO 3 disordered solid-solution occurs while the melting of silicate phases indicates a likely monotectic type system with a solidus line in the region 1050°-1100°C. Synthesis procedures involving a lithium chloride precursor are not likely to be a viable option for breeder pebble synthesis as this route was found to yield materials with a more significant Li-deficiency exhibiting the crystallisation of the Li 2 TiSiO 5 phase at intermediate compositions.

show abstract

Preparation of spherical particles of Li2TiO3 (with diameters below 100μm) by sol–gel process

Cited by 43 publications

References 2 publications

Electrical properties of bulk and nano Li2TiO3 ceramics: A comparative study

Electrical properties of bulk and nano Li2TiO3 ceramics: A comparative study

Synthesis & fabrication of lithium-titanate pebbles for ITER breeding blanket by solid state reaction & spherodization

Solution based synthesis of mixed-phase materials in the Li2TiO3–Li4SiO4 system

Contact Info

Product

Resources

About