نتایج جستجو برای: polymeric precursor

تعداد نتایج: 91431  

Journal: :Journal of Advanced Ceramics 2023

In this work, novel CNTs/CoSi/SiOC nanocomposite ceramics with in-situ formed multi-walled carbon nanotubes (CNTs) and core-shell structured CoSi@C nanoparticles were successfully prepared via a single-source-precursor derived ceramic approach. The polymeric precursor characterization as well phase evolution, microstructure electromagnetic wave (EMW) absorption properties of t...

Journal: :Open ceramics 2023

The aim of this study was the electrospinning zirconia nanofibers without sol-gel precursors. Low-cost Zr-oxide and Zr-carbonate inorganic materials, with high molecular Zr-content compared to methods, were used for precursor formulation. Using a polyvinylpyrrolidone (PVP) polymeric binder, could successfully be synthesised both Zr-sources. effects different parameters investigated stabilize pr...

Journal: :Analytical biochemistry 1999
C Papageorgopoulos K Caldwell C Shackleton H Schweingrubber M K Hellerstein

The measurement of protein kinetics by isotopic techniques has been hindered by the long-standing difficulty of accurately measuring the isotope content of the biosynthetic precursor pool (aminoacyl-tRNA in tissues). Mass isotopomer distribution analysis (MIDA) is a stable isotope-mass spectrometric (MS) technique for measuring biosynthetic precursor enrichments from measurements on a polymeric...

Journal: :journal of nanostructures 2012
m. salavati-niasari s. alikhanzadeh-arani

as a new precursor, [tris(2-hydroxyacetophenato) triaqua(iii)], [y(hap)3(h2o)3]; complex was used in thermal decomposition process for the synthesis of rod-like high-temperature ceramic ybco with length of about 320-350 nm and diameters 60–90 nm. the as-synthesized products were characterized by xrd, ft-ir, tem, sem and edx analyses. the results showed that by using fine raw materials, the calc...

Journal: :Advanced Functional Materials 2023

High-performance polymers are an important class of materials that used in challenging conditions, such as aerospace applications. Until now, 3D printing based on stereolithography processes can not be performed due to a lack suitable materials. There is report new and compositions enable objects having extremely high thermal resistance, with Tg 283 °C excellent mechanical properties. The by lo...

2013
Muhammad Sahimi Larry Rahn

In this project, we study SiC nanoporous membranes, which exhibit the potential to overcome many of the difficulties other inorganic membranes face, particularly under conditions typically encountered in reactive separations for H2 production, and in fuel-cell applications. In particular, we systematically investigate and further develop the technique of pre-ceramic polymer pyrolysis to produce...

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