Synthesis and pyrolysis of novel polysilazane to ..

Synthesis of a polysilazane layer on silica gel by chemical surface coating ..
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Synthesis of Polysilazane from Isocyanato (methyl ..

Zhang, Q.; Jia, D.; Yang, Z.; Duan, X.; Chen, Q.; Zhou, Y. Synthesis of Novel Cobalt-Containing Polysilazane Nanofibers with Fluorescence by Electrospinning. Polymers 2016, 8, 350.

1 illustrates an apparatus for synthesizing a polysilazane, as used in the examples of the present invention;FIG.
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polysilazane synthesis essay outback steakhouse goes international ..

Within the present work, reduced-graphene oxide (rGO)/silicon nitride (Si3N4) nanocomposites were prepared upon pyrolysis of a graphene oxide (GO)-filled polysilazane. The novel preparative approach consists in the synthesis of the polysilazane in the presence of different concentrations of GO, yielding a homogeneous GO/polysilazane composite which was subsequently thermally converted in Ar atmosphere into rGO/Si3N4 nanocomposites. Hot-pressing of the obtained nanocomposite powders delivered monolithic rGO/Si3N4. All prepared samples exhibited the presence of homogeneously dispersed rGO phase within an amorphous or crystalline silicon nitride matrix, as for the as-prepared and hot-pressed samples, respectively. An increasing amount of rGO in the nanocomposites was found to gradually suppress the crystallization of the silicon nitride matrix into α-Si3N4. Moreover, depending on the volume fraction of the graphene phase in the ceramic nanocomposites, different dielectric properties were observed, indicating a facile preparative method to produce materials with tunable electromagnetic waves (EMW) behavior.

Synthesis of a polysilazane layer on silica gel by chemical surface coating
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AB - Nanostructured aniline formaldehyde resin/polysilazane hybrid materials are produced by twin polymerization of 2,2′-spirobi[3,4-dihydro-1H-1,3,2-benzodiazasiline] (1). An alternative synthetic concept for similar hybrid materials, the apparent twin polymerization, is employed by using the combination of the deficient twin monomer tetrakis(phenylamino)silane (2) with hexamethylenetetramine (HMTA). Both processes for the synthesis of polysilazane hybrid materials occur under volatilization of byproducts such as ammonia or aromatic nitrogen compounds. The thermal properties of the twin monomer 1 and the combination of 2/HMTA, respectively, are investigated by differential scanning calorimetry and thermogravimetric analysis. Aniline-formaldehyde resin/polysilazane hybrid materials are characterized by solid state 13C- and 29Si-NMR spectroscopy and transmission electron microscopy. The inorganic network remains hydrolyzable and can be functionalized after polymerization at temperatures below 500 °C due to residuary reactive Si-N bonds. Thermal treatment at 1100 °C leads to the formation of amorphous Si/C/N hybrid materials.

Synthesis of Novel Cobalt-Containing Polysilazane Nanofibers with Fluorescence by Electrospinning
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