Synthesis and properties of ceramic-polymer composits

Vollath, D.; Szabó, Dorothée Vinga; Fuchs, J.

doi:10.1016/s0965-9773(99)00152-x

Cited by 25 publications

(13 citation statements)

References 6 publications

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“…Vollath and coworkers [3,16] used a single microwave reactor where the polymerization occurred as a result of the UV radiation of the microwave plasma. In the method described here, particle formation and coating are decoupled using a modular reactor design.…”

Section: Resultsmentioning

confidence: 99%

“…Vollath and co-workers reported on the synthesis of differently coated ceramic nanoparticles (e.g., zirconia coated with alumina and ceramic±polymer composites) in a microwave plasma reactor. [2,3] Srdic et al showed that, compared to pure zirconia, zirconia particles surface-doped with alumina exhibit different surface chemistry, and improved sinterability and dispersability in water. [4] Composites of nanoceramics and polymers have a broad spectrum of promising applications as biocompatible materials, [5] new transparent materials, [6] UV-absorbing filters, and socalled organic modified ceramics (Ormocer).…”

Section: Introductionmentioning

confidence: 99%

“…The polymer coating could have the function of a spacer to prevent direct contact of the nanoscaled ceramic particles. [3] This preserves special particle properties even after the fabrication of a bulk material, e.g., superparamagnetism in soft magnets. [3] Another application of polymer-coated nanocrystalline powders is the use of fillers in plastic parts where the small grain size ensures invisibility of the ceramic particles, and the polymer coating improves the ceramic±polymer interface.…”

Section: Introductionmentioning

confidence: 99%

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In‐Situ Preparation of Polymer‐Coated Alumina Nanopowders by Chemical Vapor Synthesis

Schallehn

Winterer²,

Weirich

et al. 2003

Chemical Vapor Deposition

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Nanocrystalline alumina particles coated with polyethylene have been prepared by a two-step chemical vapor synthesis (CVS) process using a hot-wall reactor to synthesize the nanocrystalline alumina core, and a RF plasma reactor for the subsequent polymer coating. The particle radius is about 4 nm, with the radius of the ceramic core being about 2.5 nm and the coating thickness about 1.5 nm. The powders have been characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer±Emmett±Teller (BET), small-angle neutron scattering (SANS), and high-resolution transmission electron microscopy (HRTEM).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In‐Situ Preparation of Polymer‐Coated Alumina Nanopowders by Chemical Vapor Synthesis

Schallehn

Winterer²,

Weirich

et al. 2003

Chemical Vapor Deposition

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“…6 zeigt beispielhaft das Schema einer zweistufigen Mikrowellenplasmaanlage mit TE 11 -Kavitäten. Auch Keramik-Polymer-Nanocomposites lassen sich im Mikrowellenplasma herstellen [105]. Bislang realisierte Produktionsraten liegen bei 50 g/h für Eisen-Nanopulver [102] …”

Section: Partikelsynthese Durch Laserverfahrenunclassified

Aerosole und ihre technische Bedeutung

Heidenreich

Büttner

Ebert

2003

Chemie Ingenieur Technik

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Aerosole – gezielt erzeugt oder unerwünscht gebildet – treten in vielen technischen Prozessen auf. So werden zum Beispiel Aerosole gezielt erzeugt, wenn Produkte, die aus feindispersen Feststoffen bestehen, in einem Gasphasenprozess (im weitesten Sinn) hergestellt werden. Partikelbildung und ‐wachstum im Aerosolzustand prägen dabei die Größe, Form und Struktur der Partikel und damit entscheidend die Produkteigenschaften. Aerosole können sich auch unerwünscht in Prozessen bilden. Dies führt zur Verunreinigung von Prozessgasen oder Produkten beziehungsweise zu erhöhten Beladungen von Abluftströmen. Kann die unerwünschte Aerosolbildung nicht vermieden werden, müssen wirkungsvolle Abscheideverfahren eingesetzt werden. Effiziente Abscheider sind auch zur Gewinnung von Produktpartikeln aus der Gasphase notwendig. Ob gezielt erzeugt oder unerwünscht gebildet, Aerosole müssen hochauflösend erfasst und charakterisiert werden. Dies erfordert eine entsprechend leistungsfähige Aerosolmesstechnik. Der Beitrag vermittelt einen Überblick über die technische Bedeutung von Aerosolen.

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“…A special field are polymer coated nanocrystalline ceramic particles. The polymer coating could have the function as a spacer to avoid direct contact of the nanoscaled ceramic particles preventing agglomeration' 2 3. This can have consequences for the dispersibility of treated and untreated nanoparticles in aequous and organic solvents.…”

Section: Introductionmentioning

confidence: 99%

In-situ preparation of polymer-coated zirconia nanoparticles by decomposition of zirconium-tert-butoxide

et al. 2002

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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.

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Synthesis and properties of ceramic-polymer composits

Cited by 25 publications

References 6 publications

In‐Situ Preparation of Polymer‐Coated Alumina Nanopowders by Chemical Vapor Synthesis

In‐Situ Preparation of Polymer‐Coated Alumina Nanopowders by Chemical Vapor Synthesis

Aerosole und ihre technische Bedeutung

In-situ preparation of polymer-coated zirconia nanoparticles by decomposition of zirconium-tert-butoxide

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