A5083154902- Glass properties and applications
- Advanced ceramic materials synthesis
- Material Dynamics and Properties
- Building materials and conservation
- Recycling and utilization of industrial and municipal waste in materials production
- Microwave Dielectric Ceramics Synthesis
- Metallic Glasses and Amorphous Alloys
- Nuclear materials and radiation effects
- Luminescence Properties of Advanced Materials
- Mineralogy and Gemology Studies
- Mesoporous Materials and Catalysis
- Additive Manufacturing and 3D Printing Technologies
- Ferroelectric and Piezoelectric Materials
- Thermal and Kinetic Analysis
- Bone Tissue Engineering Materials
- Pigment Synthesis and Properties
- Advancements in Battery Materials
- Zeolite Catalysis and Synthesis
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Structural Analysis of Composite Materials
- Clay minerals and soil interactions
- Advanced materials and composites
- Epoxy Resin Curing Processes
- Aerogels and thermal insulation
Federal Institute For Materials Research and Testing
2015-2025
Bluegrass Advanced Materials (United States)
2008
Technische Universität Berlin
1995
We report the sintering of 3 D ‐printed composites 13‐93 bioactive glass and hydroxyapatite ( HA p) powders. The process is characterized on conventionally produced powder compacts with varying p content. A numeric approximation densification kinetics then obtained basis Frenkel, Mackenzie–Shuttleworth, Einstein–Roscoe models, optimized conditions for structures are derived. Fully isotropic complex cellular by continuous heating to 750°C at a rate 2 K/min content 40 wt%. approach can readily...
The fundamental processes of nucleation and crystallization are widely observed in systems relevant to material synthesis biomineralization; yet most often, their mechanism remains unclear. In this study, we unravel the discrete stages Fe3(PO4)2·8H2O (vivianite). We experimentally monitored formation transformation from ions solid products by employing correlated, time-resolved situ ex approaches. show that vivianite occurs distinct via a transient amorphous precursor phase. metastable...
Sintering and microstructure evolution of alkali‐free calcium–alumo–borosilicate glass/α‐Al 2 O 3 composites (mean particle size ca. μm) for low‐temperature cofired ceramics were studied during heating at 5 K/min by microscopy, thermal analysis (DTA), X‐ray diffraction (XRD), electron microscopy (SEM). Composites fully densify ≈830°C, not essentially influenced the dissolution alumina glass crystallization. Thus wollastonite, as first crystalline phase, was detectable 840°C. Above 900°C, a...
Inconel 718 is a precipitation strengthened, nickel-based super alloy of interest for the Additive Manufacturing (AM) low volume, complex parts to reduce production time and cost compared conventional subtractive processes. The AM process involves repeated rapid melting, solidification reheating, which exposes material non-equilibrium conditions that affect elemental segregation subsequent formation phases, either beneficial or detrimental. These variations are difficult characterize due...
The development of new glasses is often hampered by inefficient trial‐and‐error approaches. traditional glass manufacturing process not only time‐consuming, but also difficult to reproduce with inevitable variations in parameters. These challenges are addressed implementing an ontology‐based digital infrastructure coupled a robotic melting system. This system facilitates high‐throughput synthesis and ensures the collection consistent data. In addition, includes machine learning models for...
Metal-organic frameworks (MOFs) are promising nanoporous materials with many practical applications. This owes largely to their remarkable porosity and the presence of specific chemical functionalities, such as exposed metal sites (EMS). The MOF-74 structure is known for exhibiting one highest EMS densities among porous materials. Moreover, inclusion structural defects has been proposed enhance activity further. was previously achieved by mixing original linker together a second, having...
The manufacture of sintered glasses and glass-ceramics, glass matrix composites glass-bounded ceramics or pastes is often affected by gas bubble formation. Against this background, we studied sintering foaming barium silicate powders used as SOFC sealants using different powder milling procedures. Sintering was measured means heating microscopy backed up XPD, DTA, Vacuum Hot Extraction (VHE) optical electron microscopy. Foaming increased significantly progressed. For moderately milled...
Physical storage of gaseous hydrogen under high-pressure in glassy micro-containers such as spheres and capillaries is a promising concept for enhancing safety the volumetric capacity mobile systems. As very low permeation through container wall required compressed hydrogen, development glasses minimal permeability needed. For this purpose, one has to understand better dependence on glass structure. The paper points out that minimizing accessible free volume sound strategy minimize...
To understand the influence of water and alkalis on aluminosilicate glasses, three polymerized glasses with varying ratio Na/K were synthesized [(22.5-x) Na2O - x K2O 22.5 Al2O3 55 SiO2 = 0; 7.5; 11.25). Subsequently, these hydrated (up to 8 wt% H2O) in an internally heated gas pressure vessel. Density hydrous linearly decrease content above 1wt%, consistent a partial molar volume H2O 12 cm3/mole. NIR spectroscopy reveal that hydroxyl groups are dominant species at contents 5 wt%. The...
The internal friction of hydrated soda-lime-silica glasses with total water content (C(W)) up to 1.9 wt. % was studied by dynamic mechanical analysis (DMA) using temperature-frequency sweeps from 723 K 273 and 1 s(-1) 50 s(-1). Total concentrations H2O molecules (C(H2O)) OH groups (C(OH)) in the DMA specimens were determined infrared spectroscopy. For low contents (C(W) ≈ C(OH) < 0.25 %) two discrete peaks below glass transition (α relaxation) assigned low-temperature motion alkali ions (γ...
New fluorinated Ca- and Sr-based coordination polymers were successfully synthesized<italic>via</italic>a mechanochemical synthesis route by milling of metal hydroxides with tetrafluoroisophthalic acid.