Article
Metallurgy & Metallurgical Engineering
Dongseok Lee, Sung-Ho Joo, Dong Ju Shin, Shun Myung Shin
Summary: The mechanism of Li leaching from lithium aluminum silicate glass-ceramics was studied, showing significant improvement in Li leaching efficiency after heat treatment. The crystal structure transitioned from hexagonal to tetragonal, resulting in a four-fold expansion of the lattice constant and increased reactivity with NaOH.
Article
Materials Science, Ceramics
Monika Backhaus-Ricoult, Monique Comte, Eric Francois, Aram Rezikyan, Bryan Wheaton
Summary: Structural, chemical, and microstructural changes in lithium aluminum silicate glass during ceramming are studied using in-situ impedance spectroscopy, X-ray diffraction and transmission electron microscopy. The evolution of the glass' electric and dielectric properties during ceramming is observed. The study reveals that nuclei form by de-mixing and phase separation of the glass, leading to the development of distinct interfaces and ion mobility in the crystalline phase over time.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Qianxiong Wen, Meilin Fu, Heng Chen, Shuang Pan, Chaofan Shi, Xinyue Zhang, Xiaojuan Liang, Xingen Hu, Weidong Xiang
Summary: Phosphor-in-glass (PiG) plays a crucial role in high-brightness laser lighting, but its poor thermal stability and brittleness at low power have limited its effectiveness. This study introduces a lithium-aluminium-silicate (LAS) glass system to synthesize LAS-glasses that can withstand high-energy laser irradiation without heat dissipation, achieving high luminous efficiency. Additionally, a pre-thermal treatment enhances the glass's resistance to laser ablation, resulting in increased power and maximum luminous efficiency. This research shows promise for PiG applications and the advancement of laser lighting.
CERAMICS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Dongseok Lee, Sung-Ho Joo, Dong Ju Shin, Shun Myung Shin
Summary: This study investigates the leaching of Li from lithium aluminum silicate (LAS) glass-ceramics using a Ca salt additive and water. The results show that Li can be efficiently leached through an ion exchange reaction between Li+ and Ca2+. This research is significant for the recovery of Li from LAS glass-ceramics.
Article
Materials Science, Ceramics
A. Rahman, G. Mariotto, E. Cattaruzza, E. Trave, F. Gonella, A. Quaranta
Summary: The study investigates the modification of silica network structure and silver clustering process during external treatments in ion-exchanged silicate glasses. External treatments result in adjustments to the silica network microstructure, including changes in polymerizing units and appearance/disappearance of non-bridging oxygen centers.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Sean Locker, Jennifer A. Clark, S. K. Sundaram
Summary: Femtosecond pulse laser radiation on alkali and alkaline earth modified soda-lime silicate glasses leads to densification on the surface, with the degree of density changes depending on pulse energy and glass-network connectivity. Raman spectroscopy study confirms the role of modifier ions in affecting the structural rigidity and disorder degree of the glass.
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
(2021)
Article
Environmental Sciences
Dongseok Lee, Sung-Ho Joo, Dong Ju Shin, Shun Myung Shin
Summary: The study investigated the behavior and mechanism of Li leaching from lithium aluminum silicate glass-ceramics using aqueous NaOH solution. The efficiency of Li leaching was found to increase with higher NaOH concentration, specific surface area, and reaction temperature. However, prolonged leaching time may result in a decrease in Li leached due to the formation of zeolite around the glass-ceramics.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2021)
Article
Optics
Cihang Kong, Christian Pilger, Manuel Kunisch, Christine Foerster, Jan Schulte am Esch, Thomas Huser
Summary: Coherent Raman scattering (CRS) microscopy is a label-free imaging method with high chemical sensitivity and sub-micron spatial resolution. A tunable two-color fiber laser with superior noise performance is demonstrated. Large-area multimodal imaging of human liver tissue sections is achieved and compared to commercial laser data.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
A. R. Zanatta
Summary: The Raman spectrum of lithium niobate (LiNbO3) was investigated at various temperatures and laser spot sizes. The main phonon modes were analyzed in terms of peak position and linewidth, revealing contributions from anharmonic phonon-coupling and thermal lattice expansion processes. The A1(TO4) mode exhibited a peculiar behavior depending on the laser spot size, attributed to the congruent-photorefractive nature of LiNbO3 and changes in polarization geometry.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Physical
Bin Shen, Xing Xu, Wanmin Liu, Mulan Qin, Weigang Wang
Summary: Surface modification of LiCoO2 with the lithium ionic conductor LiAlSiO4 enhances its electrochemical performance at a high cutoff voltage of 4.55 V, resulting in higher reversible specific capacity and excellent rate capability. This improvement is attributed to the effective stabilization of the surface and bulk structure by LiAlSiO4 coating, making it a promising strategy to enhance the electrochemical performance of high-voltage LiCoO2.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Xiaoying Luo, Xuexia Wei, Cunhao Zhang, Jiaqi Huang, Xuan Cheng
Summary: Surface, interface, and microstructure studies were conducted on a modified carbon-coated lithium iron silicate composite with 15% vanadium modification to understand its enhanced electrochemical performance. The study confirmed the presence of amorphous carbon coating on the composite surface and a change in the predominant crystal phase after vanadium modification. Multi-peak fitting analysis of X-ray photoelectron spectroscopy spectra identified the simultaneous presence of multivalent iron and vanadium ions. The detailed characterization of microstructure, interface, and surface provided strong evidence for the partial substitution of divalent iron with divalent vanadium and the surface modification by vanadium, resulting in increased total carbon content and improved charge transfer kinetics.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Masaru Mukai, Mari Takahara, Akihiko Takada, Astushi Takahara
Summary: The surface modification of imogolite with a peptide oligomer was confirmed through experiments and tests, leading to the preparation of a network-like hydrogel.
Article
Materials Science, Multidisciplinary
Keith Veenhuizen, Collin Barker, Jacob Franklin, Sean McAnany, Bruce Aitken, Daniel Nolan, Volkmar Dierolf, Himanshu Jain
Summary: This study overcomes the challenge of achieving continuous single-crystal growth of LiNbO3 within LNS glass by investigating the influence of incongruent composition of the glass matrix on the formation of single-crystal LiNbO3. By exploring the parameter space of glass composition, laser scanning speed, and laser power, different growth modes were observed, and certain glass compositions were found to enable indefinitely long single crystal growth.
Article
Crystallography
Maxime Cavillon, Jing Cao, Maxime Vallet, Francois Brisset, Leo Mazerolles, Brahim Dkhil, Matthieu Lancry, Bertrand Poumellec
Summary: This study investigates the heat-affected zone in glass during ultrafast laser-induced crystallization using high-resolution electron microscopy techniques, revealing a bouquet-like structure from poorly textured nanocrystals between two regions. Insights into the chemical separation process and spatial distribution of SiO2 and LiNbO3 are provided, suggesting a model based on electric field modulation from inhomogeneous plasma electron trapping.
Article
Materials Science, Ceramics
Siyuan Fu, Wenqing Xie, Yongmin Duan, Panpan Li, Xunsi Wang, Shiqing Xu, Junjie Zhang
Summary: In this study, a silicate glass-ceramic containing LiYF4 crystals was prepared and used as an active material to improve the irreversible capacity loss of lithium-ion batteries. The presence of LiYF4 crystals increased the specific capacity and efficiency of the batteries by providing more sites for lithium-ion storage and promoting intercalation/deintercalation. The cycling stability of the anode was also enhanced by the presence of LiYF4 crystals.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
T. O. Lipatieva, A. S. Lipatiev, Y. Kulakova, S. Lotarev, S. S. Fedotov, I. Prusova, V. N. Sigaev
Summary: The study found that by adjusting the parameters of laser radiation and the composition of the etching solution, the length of hollow channels formed by a one-stage method can be significantly increased. Additionally, using etching solutions that dissolve the fractured layer of the channels can result in deeper and wider channels while maintaining high selectivity.
GLASS AND CERAMICS
(2022)
Article
Materials Science, Multidisciplinary
Alexey S. Lipatiev, Georgiy Yu Shakhgildyan, Maxim P. Vetchinnikov, Hojeong Lee, Jong Heo, Sergey Lotarev, Vladimir N. Sigaev
Summary: In this study, the structure of microdomains containing CdS nanoparticles in glass written by laser was examined using transmission electron microscopy. CdS nanocrystals had a size distribution with multiple peaks, with quantum dots of minimal size near the edges. The CdS nanocrystals showed a significant increase in size from the periphery to the center of the laser-written microdomain, with potential applications in advanced optical data encoding and security tagging.
Article
Optics
Tatiana O. Lipateva, Andrey G. Okhrimchuk, Alexey S. Lipatiev, Igor A. Karateev, Sergey S. Fedotov, Sergey V. Lotarev, Alexander V. Shestakov, Vladimir N. Sigaev
Summary: The laser-assisted yttrium aluminum garnet (YAG) crystal-to-crystal bonding with shear strength up to 110 MPa was investigated using various microscopy techniques. The presence of an amorphous phase, confirmed by electron microscopy, showed a nanoperiodic amorphous nanoplanes structure interleaved with crystalline regions. The results suggest a potential development of passive cooling technology for high-power solid-state lasers.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
A. G. Okhrimchuk, A. D. Pryamikov, V. V. Likhov, D. S. Dobrovolskii, A. Shestakov, G. Yu Orlova, A. S. Lipatiev, A. A. Zhiltsova, A. N. Romanov
Summary: A fabrication method of hollow channels in YAG:Nd with walls facetted parallel to crystallographic planes is proposed and investigated. The method involves direct laser writing and wet facetted etching, resulting in the successful formation of hexagonal hollow channels. The propagation loss is measured to be very low.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Chemistry, Physical
Tatiana O. Lipateva, Alexey S. Lipatiev, Igor V. Karateev, Andrey G. Okhrimchuk, Sergey S. Fedotov, Sergey V. Lotarev, Grigory K. Alagashev, Vladimir N. Sigaev
Summary: Femtosecond laser writing is a versatile and effective technique for high-precision 3D micromachining of crystals for applications in photonics. In this study, the control over the structure and phase composition in yttrium aluminum garnet (YAG) single crystal using femtosecond laser-assisted method is demonstrated. The mechanism of plastic deformation responsible for the formation of dislocations and amorphous phase is experimentally confirmed. The results contribute to the deeper understanding of fundamentals of the direct laser writing in crystals.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Alexey S. Lipatiev, Sergey V. Lotarev, Tatiana O. Lipateva, Sergey S. Fedotov, Elena V. Lopatina, Vladimir N. Sigaev
Summary: The study focuses on the conditions of partial remelting of laser-written LaBGeO5 crystalline tracks in lanthanum borogermanate glass using femtosecond laser pulses. The sinusoidal path is shown to be favorable for tailoring the improved cross-section of the crystalline lines by partial remelting. The proposed technique provides a new way to control the morphology of laser-written crystal-in-glass waveguides by tailoring their cross-section.
Article
Chemistry, Multidisciplinary
Sergey. V. V. Lotarev, Sergey. S. S. Fedotov, Alyona. I. I. Pomigueva, Alexey. S. S. Lipatiev, Vladimir. N. N. Sigaev
Summary: We observed an unexpected pulse repetition rate effect on ultrafast-laser modification of sodium germanate glass. At lower pulse repetition rates, nanogratings with form birefringence are formed, while at higher repetition rates, peripheral microcrystallization occurs due to the thermal effect of femtosecond pulses. The growth of optical retardance in the nanogratings is revealed instead of a gradual decrease with increasing repetition rate, and the threshold for this retardance growth is inversely related to the pulse energy.
Article
Engineering, Chemical
Georgiy Yu. Shakhgildyan, Roman O. Alekseev, Nikita V. Golubev, Vitaliy I. Savinkov, Andrey S. Naumov, Natalia N. Presnyakova, Vladimir N. Sigaev
Summary: The glass crystallization regime is crucial in the production of glass ceramics, as it affects phase composition, microstructure, and properties of the final product. This study evaluated the impact of crystallization temperature on the glass structure, phase composition, and hardness of glass ceramics in the ZnO-MgO-Al2O3-SiO2 system with TiO2 and ZrO2 as nucleators. Through polythermal crystallization and a gradient furnace, gahnite nanocrystals were observed as the main phase, with changes in microstructure, transparency, and hardness. Vickers hardness values showed a non-linear trend, revealing the optimal thermal range for glass crystallization.
Article
Materials Science, Ceramics
V. N. Sigaeva, A. S. Naumov, A. S. Lipat'ev, G. Yu. Shakhgil'dyan, S. V. Lotarev, S. S. Fedotov, I. A. Karateev
Summary: The influence of femtosecond laser micromachining on a transparent glass-ceramic in thermal and athermal regimes was studied. Amorphization of nanosized crystals was confirmed, and the change in refractive index in the laser-written tracks was assessed. The results expand the potential application areas of transparent glass-ceramics with heightened strength.
GLASS AND CERAMICS
(2023)
Article
Materials Science, Ceramics
S. S. Fedotov, T. O. Lipat'eva, A. S. Lipat'ev, G. Yu. Shakhgil'dyan, S. V. Lotarev, V. I. Savinkov, V. N. Sigaev
Summary: This study demonstrates the possibility of creating a stable joint between materials with different values of linear thermal expansion coefficient (LTEC) using femtosecond laser beam welding. Phosphate glass and zinc-magnesium-aluminum-silicate sitall were successfully welded together, with LTEC values of 120 x 10(-7) K-1 and 62 x 10(-7) K-1 respectively. Optical microscopy and Raman spectroscopy were employed to investigate the structural features of the welds and optimize the welding regimes.
GLASS AND CERAMICS
(2023)
Article
Materials Science, Ceramics
Sergey Fedotov, Tatiana Lipateva, Alexey Lipatiev, Olga Dymshits, Sergey Lotarev, Vladimir Sigaev
Summary: This paper presents a promising technique using femtosecond laser welding for efficient bonding of laser phosphate glass and spinel-based glass-ceramic. The weld joints showed a high shear strength of up to 147 MPa. The study also revealed the laser-induced amorphization of glass-ceramics and the formation of strong interconnection by laser-driven mutual diffusion. These findings demonstrate the potential of femtosecond lasers for efficient industrial welding of various materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
V. N. Sigaev, A. S. Lipat'ev, S. S. Fedotov, S. Lotarev, A. S. Naumov, D. M. Shevyakina
Summary: Polarization-dependent birefringence formation in lithium silicate and lithium aluminosilicate glasses under femtosecond laser pulses is likely due to the formation of nanogratings. The presence of an alkaline component in the glass composition leads to an increase in Al2O3 content, impacting the minimum number of pulses required for birefringent region formation and the retardance.
GLASS AND CERAMICS
(2022)
