scholarly journals Characterization of 45° Micromirrors Fabricated by Silicon Anisotropic Etching in Solutions Containing Different Organic Additives

2012 ◽  
Vol 47 ◽  
pp. 510-513 ◽  
Author(s):  
Krzysztof Rola ◽  
Konrad Ptasiński ◽  
Adrian Zakrzewski ◽  
Irena Zubel
Keyword(s):  
Anisotropic Etching ◽  
Organic Additives

scholarly journals Synthesis and Characterization of Mixed Metal Oxide Nanocomposite Energetic Materials

2003 ◽  
Vol 800 ◽  
Author(s):  
Brady J. Clapsaddle ◽  
Lihua Zhao ◽  
Alex E. Gash ◽  
Joe H. Satcher ◽  
Kenneth J. Shea ◽  
...  
Keyword(s):  
Mass Transport ◽  
Metal Oxide ◽  
Energetic Materials ◽  
Silicon Oxide ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Mixed Metal Oxide ◽  
Organic Additives ◽  
Metal Oxide Silicon

ABSTRACTIn the field of composite energetic materials, properties such as ingredient distribution, particle size, and morphology, affect both sensitivity and performance. Since the reaction kinetics of composite energetic materials are typically controlled by the mass transport rates between reactants, one would anticipate new and potentially exceptional performance from energetic nanocomposites. We have developed a new method of making nanostructured energetic materials, specifically explosives, propellants, and pyrotechnics, using sol-gel chemistry. A novel sol-gel approach has proven successful in preparing metal oxide/silicon oxide nanocomposites in which the metal oxide is the major component. Two of the metal oxides are tungsten trioxide and iron(III) oxide, both of which are of interest in the field of energetic materials. Furthermore, due to the large availability of organically functionalized silanes, the silicon oxide phase can be used as a unique way of introducing organic additives into the bulk metal oxide materials. As a result, the desired organic functionality is well dispersed throughout the composite material on the nanoscale. By introducing a fuel metal into the metal oxide/silicon oxide matrix, energetic materials based on thermite reactions can be fabricated. The resulting nanoscale distribution of all the ingredients displays energetic properties not seen in its microscale counterparts due to the expected increase of mass transport rates between the reactants. The synthesis and characterization of these metal oxide/silicon oxide nanocomposites and their performance as energetic materials will be discussed.

Dispersion of Glass Powder and Characterization of Thick Film for AC Plasma Display Panels

2007 ◽  
Vol 124-126 ◽  
pp. 355-358
Author(s):  
Kwan Wuk Park ◽  
Jin Seok Lee ◽  
Hee Jin Lim ◽  
Sung Churl Choi
Keyword(s):  
Screen Printing ◽  
Phosphate Ester ◽  
Organic Additives ◽  
Forming Process ◽  
Screen Printing Method ◽  
Thermal Gravimetric Analyzer ◽  
Plasma Display Panels ◽  
Plasma Display ◽  
Practical Forming

Bi-based glass pastes were prepared in the mixed organic solvents (α-terpineol and texanol) with different kinds and concentrations of organic dispersant such as fish oil , phosphate ester and poly methyl methacrylate (PMMA). The rheological stability of glass pastes was characterized by using a rheometer and adsorption behavior of organic additives for the glass powders was carried out by using a thermal gravimetric analyzer (TGA).The Bi-based glass pastes exhibited the most stable rheological behavior at an addition of phosphate ester of 0.5 in mass %, due to the steric repulsive force acting on the surface of glass powers with adsorbing the organic additives. This study allowed significant delay of the sedimentation time and suppressed generation of micropores during practical forming process by a screen printing method.

Synthesis and Characterization of Composite Structure Zeolite Y

2011 ◽  
Vol 233-235 ◽  
pp. 1790-1793 ◽  
Author(s):  
Wei Shen ◽  
Bao Jian Shen
Keyword(s):  
Silica Gel ◽  
Composite Structure ◽  
Zeolite Y ◽  
Synthesis And Characterization ◽  
Organic Additives ◽  
X Ray Diffraction ◽  
Y Zeolite ◽  
X Ray

Y zeolite was synthesized form silica gel microsphere by in- situ hydrothermal method, with appropriate amount of other constituents, such as sodium silicate, water, without adding any organic additives. The as-synthesized samples were characterized using powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and N2 sorption. The results show that the synthesized sample not only has a composite structure with zeolite Y and silica gel, but also retains the shape of silica gel microsphere. The pore distribution of the composite materials indicated that the composite material contains two types of pore that are micropores and large pores.

Tandem Mass Spectrometry (MS/MS) for Analysis of Additives in a Rubber Vulcanizate

1988 ◽  
Vol 61 (4) ◽  
pp. 658-668 ◽  
Author(s):  
Robert P. Lattimer
Keyword(s):  
Neutral Loss ◽  
Direct Analysis ◽  
Organic Additive ◽  
Organic Additives ◽  
Mass Measurements ◽  
Chemical Noise ◽  
Mass Spectral ◽  
Rubber Compounds ◽  
Ionization Methods

Abstract MS/MS appears to have considerable potential as a means for improved direct mass spectral characterization of organic additives in rubber compounds. In this report, we have shown how daughter-ion, parent-ion, and neutral-loss scans can improve the specificity for identification of organic additive components in rubber vulcanizates. The use of MS/MS to reduce the “chemical noise” in the direct analysis of complex mixtures is demonstrated. MS/MS should not be viewed as a technique that will replace other mass spectral methods in rubber applications. For example, desorption ionization methods, GC/MS, LC/MS and high-resolution mass measurements will still have important roles. MS/MS can serve as a supplemental tool for direct mixture analysis that is both rapid and powerful.

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