A5034549476- Glass properties and applications
- Advanced ceramic materials synthesis
- Advanced materials and composites
- X-ray Diffraction in Crystallography
- Boron and Carbon Nanomaterials Research
- Nuclear materials and radiation effects
- Solid-state spectroscopy and crystallography
- Advanced NMR Techniques and Applications
- Crystallization and Solubility Studies
- Luminescence Properties of Advanced Materials
- Metal and Thin Film Mechanics
- MXene and MAX Phase Materials
- Intermetallics and Advanced Alloy Properties
- Recycling and utilization of industrial and municipal waste in materials production
- Advanced Surface Polishing Techniques
- Nuclear Materials and Properties
- Metallic Glasses and Amorphous Alloys
- Metallurgical Processes and Thermodynamics
- Structural Analysis of Composite Materials
- Material Science and Thermodynamics
- Advanced machining processes and optimization
- Phase-change materials and chalcogenides
- Solidification and crystal growth phenomena
- Optical Network Technologies
- Catalytic Processes in Materials Science
Nippon Electric Glass (Japan)
2008-2025
John Wiley & Sons (United States)
2018-2023
Hudson Institute
2018-2023
Moss Landing Marine Laboratories
2022-2023
Doshisha University
1997-1999
Glass-ceramics are noted for their unusual combination of properties and manifold commercialized products consumer specialized markets. Evolution novel glass ceramic processing routes, a plethora new compositions, unique exotic nano- microstructures over the past 60 years led us to review definition glass-ceramics. Well-established emerging methods, such as co-firing, additive manufacturing, laser patterning analyzed concerning core requirements glass-ceramics performance final products. In...
Glass-ceramics have brought us necessary products for our modern society, such as heat-resistant tableware, biomaterials, electronics, photonics, and information technology. It has been more than 60 years since the invention of glass-ceramics, even today, research development characteristic glass-ceramics are ongoing. In particular, mechanical properties, thermal shock resistance, optical transparency, ionic conductivity always important issues glass researchers industry. This article...
Abstract The effect of the average ionic potential ξ = Ze / r network modifier cations on crack initiation resistance ( CR ) and Young's modulus E has been measured for a series alkaline‐earth aluminoborosilicate glasses with compositions 60SiO 2 –10Al O 3 –10B –(20− x )M (2) O– M’O (0 ≤ 20; M, M’ Mg, Ca, Sr, Ba, Na). Systematic trends indicating an increase increasing potential, ξ, have correlated structural properties deduced from NMR interaction parameters in 29 Si, 27 Al, 23 Na, 11 B...
Indentation experiments have helped understand non linear mechanical properties of brittle materials such as plasticity, damage and fracture. However, our understanding stress fields under indentation remains limited due to the general lack direct measurements. This study introduces a novel approach characterizing in silicate glasses by combining high sensitivity birefringence measurements, photoelastic calculations finite element analysis (FEA). We extensively investigated elastoplastic...
The beneficial effect of magnesium oxide upon the performance crack-resistant glasses has been explored in a series aluminoborosilicate with compositions 60SiO2–(20 – x)Al2O3–xB2O3–20Na2O and x)Al2O3–xB2O3–10Na2O–10MgO. simultaneous presence both boron aluminum oxides these produces synergetic crack resistance (CR), whose structural origins are being by detailed 11B, 23Na, 27Al, 29Si single double resonance solid-state NMR studies. Aluminum is exclusively four-coordinated, whereas found...
The influence of thermal history on the kinetics liquid-solid transformations is investigated for heterogeneous crystal nucleation near liquidus temperature in a melt with lithium disilicate composition contact PtRh10 carrier. It shown that achieved undercooling depends preceding superheating protocol. This explained by distribution nano-sized cavities surface precious metal, which crystalline clusters can persist above characteristic time. In series different quality carrier and air...
Nanocrystalline cerium(IV) oxide (CeO 2 ) powders have been prepared by adding hydrazine monohydrate to an aqueous solution of hydrous cerium nitrate (Ce(NO 3 ·6H O), followed washing and drying. The lattice parameter the as‐prepared powder is a = 0.5415 nm. characteristics sinterability reactive CeO studied. surface areas that heated at low temperatures are high, these do not decrease 10 m /g until temperature >1200°C. Crystallite size particle strongly dependent on heating temperature....
Carbon nanofiber (CNF)‐dispersed B 4 C composites have been synthesized and consolidated directly from mixtures of elemental raw powders by pulsed electric current pressure sintering (1800°C/10 min/30 MPa). A 15 vol% CNF/B composite with ∼99% dense homogeneous microstructures (∼0.40 μm grains) revealed excellent mechanical properties at room temperature high temperatures: a bending strength (σ b ) ∼710 MPa, Vickers hardness ( H v ∼36 GPa, fracture toughness K I ∼7.9 MPa m 1/2 ,...
Alkali-borosilicate glasses with composition (80-x)SiO2-xB2O3-20Na2O (10 ≤ x 30) were subjected to a 25 GPa compression and decompression at room temperature, resulting in density increases between 1.4% 1.9%. The structural changes associated this process have been investigated compared uncompressed having the same thermal history. Systematic trends are identified, using Raman scattering multinuclear solid-state Nuclear Magnetic Resonance (ssNMR). Perhaps counterintuitively, pressurization...
The structural aspects of ambient-temperature densification via pressurization at 25 GPa were studied by solid-state NMR for two case studies: An alkaline earth boroaluminosilicate glass with the composition 6CaO-3SrO-1BaO-10Al2O3-10B2O3-70SiO2 (labeled SAB) and a sodium magnesium borosilicate 10Na2O-10MgO-20B2O3-60SiO2 MNBS). For SAB glass, cold results in significant increases average coordination numbers both boron aluminum, line previous found hot-compressed alkali aluminoborosilicate...
Dense TiB ceramics (99.6% of theoretical) with a grain size ∼5 µm have been fabricated by reaction hot pressing 2 and titanium for h at 1900°C 28.5 MPa. The exhibit fracture toughness ( K IC ) 4.5 MPa·m 1/2 bending strength (sigma b 360 Electrical resistivity (rho) is 3.4 × 10 ‐7 Omega·m room temperature.
Applications of Li2O-Al2O3-SiO2 glass-ceramics (LAS GC) have been extended to electronic and optical devices production process equipment in addition their conventional use cookware. For further expansion application new markets, we demonstrate three topics our research on the material processes from viewpoint glass phases. The first topic is spherical LAS GC powder for a filler application. It has developed successfully, which can be prepared single heat treatment where spheroidizing by...
Transparent Li2O-Al2O3-SiO2 low-expansion glass-ceramics have an undesirable brown color owing to Fe ions as a contaminant, whereas the mother glass normally has clear appearance. Elucidation of coloration mechanism during crystallization is important for industry develop highly transparent materials. In this study, contained SiO2, Al2O3, and Li2O its principal constituents TiO2 ZrO2 nucleation agents. The amount contaminant in form Fe2O3 was 0.03 wt%. It confirmed that appeared by...
Abstract Resorbable glasses with nominal molar compositions of 20Na 2 O·30[(1− x )CaO· SrO]∙50P O 5 , where = 0, 0.25, 0.50, 0.75, and 1, were prepared characterized. With the replacement CaO by SrO, volume, refractive index, coefficient thermal expansion increased, glass transition temperature, crystallization viscosity decreased. The SrO decreased dissolution rate in 37°C water nearly an order magnitude. fibers drawn from melts O·30CaO·50P exhibited decreasing transmission laser light (632...
Dense zirconium boride (ZrB2)-based materials with and without tungsten (W) have been fabricated directly from mixtures of constituent elemental powders by pulsed electric current pressure sintering (PECPS) at 1800°C for 10 min under 30 MPa in a vacuum. Formation processes monolithic, W-doped ZrB2 solid solutions (Zr1-xWx)B2 (0<x≤0.12), composites consisting ZrB2(ss) WB2 were investigated. Their mechanical properties Vickers hardness (Hv), fracture toughness (KIC), bending strength (σb)...
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Superposition of 17 O triple-quantum magic-angle spinning NMR spectra 20MgO–20Al 2 3 –60SiO (MAS**) and 20Na O–20Al (NAS**) glasses prepared at ambient pressure (AP) pressurized decompressed 25 GPa room temperature (HP(25)).