Über den Einfluß synthetischer Füllstoffe auf die Wirksamkeit waschaktiver Substanzen (WAS)

Influence of Synthetic Fillers on the Efficacy of Wash-Active Substances The efficacy of wash-active substances is either not affected at all, or affected only to a negligible extent by the addition of highly dispersed synthetic silicic acids or silicates. This is true as regards foaming, foam stability and water-binding capacity. Even under additional stresses, such as those due to water hardness or due to fats, the above statement holds its validity. The present studies were undertaken in view of the fact that increasing amounts of synthetic fillers are presently being used together with wash-active substances. The synthetic fillers are employed in order to improve the handling properties of the raw materials and to enhance their utility.     

High-throughput battery materials testing based on test cell arrays and dispense/jet printed electrodes

A cost effective and reliable technology for the fabrication of electrochemical test-cell arrays for battery materials research, based on batch-fabricated glass micro packages was developed and tested. Jet dispensing was investigated for the first time as a process for fabricating battery electrode arrays and separators and compared to micro dispense printing. The process shows the reproducibility over the whole range of investigated materials and battery cell structures that is required for battery materials research. Such setup gives rise to a significantly improved reliability and reproducibility of electrochemical experiments. Cost-effective fabrication of our test chips by batch processing allows for their single-use in electrochemical experiments, thereby preventing contamination issues due to repeated use as in conventional laboratory test cells. In addition, the integration of micro pseudo reference electrodes is demonstrated. Thus, the test cell array together with the developed electrode/electrolyte deposition technology provide a highly efficient tool for speedy combinatorial and high throughput testing of battery materials on a system level (full cell tests). Experimental results are shown for the microfabrication of lithium-ion test cells with help of several electrode and binder materials. The influence of jetting parameters on electrode lateral dimensions and thickness, reproducibility of the electrode mass as well as the use of integrated micro-reference electrodes for impedance spectroscopy and cyclic voltammetry measurements in micro cells are presented in detail.

     

Characteristics of Li-ion micro batteries fully batch fabricated by micro-fluidic MEMS packaging

Microsystem Technologies - A cost-effective and reliable technology allowing extreme miniaturization of batteries into glass chips and electronic packages has been developed, employing a...     

Eigenschaften hochtemperaturhydrolytisch hergestellter Kieselsäuren und Metalloxide für Katalysatoren

Catalytic properties of silicic acids and metal oxides prepared hydrolytically at high temperatures . The physical and chemical properties of silicic acids and metal oxides (Al₂O₃ and TiO₂ P25) prepared hydrolytically at high temperatures are described, insofar as they might be of interest to catalyst producers. A highly topical literature survey reveals areas of interest in the fields of research and practical applications. The experimental section deals with the preparation of catalyst supports made of highly dispersed silica gel products. Their characteristics are tabulated.     

Basic characteristics and applications of a silica derived by flame hydrolysis. XX. Dust-free handling of solid materials in powder form with extremely low bulk densities

Powders of small particle size and low bulk density find widespread use. Methods of handling must minimise their release into the atmosphere so as to reduce environmental and health implications. These methods are considered in detail here.     

Amorphous synthetic silica products in powder form. Part 2. Applications [1]

The most important applications of synthetic silicas have been briefly described, and many literature sources compiled. In addition to the mechanical characteristics, primarily the rheological and optical characteristics of numerous material systems are improved in the desired sense. All less important fields of application have also been systematically considered. Possibly the most interesting change in characteristics is found in the fact that chemically aftertreated silicas may transfer their hydrophobicity to other materials or systems.