Accession Number : ADP014292


Title :   In-situ Preparation of Polymer-Coated Zirconia Nanoparticles by Decomposition of Zirconium-Tert-Butoxide


Descriptive Note : Conference proceedings


Corporate Author : DARMSTADT UNIV (GERMANY)


Personal Author(s) : Schallehn, Michael ; Lorenzen, Volker ; Seydel, Johannes ; Hahn, Horst


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/p014292.pdf


Report Date : Jan 2003


Pagination or Media Count : 7


Abstract : Nanocrystalline zirconia particles coated with polymers have been prepared by a two step Chemical Vapor Synthesis process using a hot wall reactor to synthesize the nanocrystalline ceramic core and a subsequent RF plasma reactor for the polymer coating. The polymer coating is built up of organic byproducts of the pyrolysis of the zirconia precursor. By using continuous and pulsed plasma deposition and variation of the plasma parameters such as RF power, period and duty-cycle the structure and thickness of the polymer coating can be influenced. Typical particle radii are in the range of 3 to 4 nm with radii of the ceramic core in the range of 2 nm and a coating thickness in the range of 1 to 2 nm. The powders have been characterized by FT-IR, XRD, BET and HRTEM. Consequences for the dispersibility are reported.


Descriptors :   *POLYMERS , *COATINGS , *DECOMPOSITION , *ZIRCONIUM OXIDES , *IN SITU ANALYSIS , SYMPOSIA , PREPARATION , PRECURSORS , X RAY DIFFRACTION , CERAMIC MATERIALS , ORGANIC MATERIALS , GERMANY , PYROLYSIS , RADIOFREQUENCY POWER , POLYCRYSTALLINE , NANOSTRUCTURES


Subject Categories : Polymer Chemistry
      Coatings, Colorants and Finishes


Distribution Statement : APPROVED FOR PUBLIC RELEASE