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Synthesis of Nanocrystalline Zr3N4 and Hf3N4 Powders from Metal Dialkylamides

Li, Jinwang and Dzivenko, Dmytro and Zerr, Andreas and Fasel, Claudia and Zhou, Yanping and Riedel, Ralf (2005):
Synthesis of Nanocrystalline Zr3N4 and Hf3N4 Powders from Metal Dialkylamides.
In: Zeitschrift für anorganische und allgemeine Chemie, Wiley-VCH Verlag GmbH, Weinheim, pp. 1449-1455, 631, (8), ISSN 0044-2313, DOI: 10.1002/zaac.200400539, [Online-Edition: https://doi.org/10.1002/zaac.200400539],
[Article]

Abstract

A simple process to synthesize Zr3N4 and nitrogen‐rich Hf3N4 powders via ammonolysis of metal dialkylamides, i.e. Zr(NEt2)4 and Hf(NEt2)4, at temperatures below 700 °C is presented. The obtained nitrides have a rhombohedrally distorted NaCl‐type structure, which has previously been reported only for nitrogen‐rich films of these nitrides. Regardless of the atmosphere (N2 and He), the Zr3N4 starts to decompose above about ∼ 650 °C and achieves the highest decomposition rate at about 900 °C, finally yielding the mononitride ZrN. Both Zr3N4 and Hf3N4 powders are nanocrystalline with the crystal size of about 2 nm.

Item Type: Article
Erschienen: 2005
Creators: Li, Jinwang and Dzivenko, Dmytro and Zerr, Andreas and Fasel, Claudia and Zhou, Yanping and Riedel, Ralf
Title: Synthesis of Nanocrystalline Zr3N4 and Hf3N4 Powders from Metal Dialkylamides
Language: English
Abstract:

A simple process to synthesize Zr3N4 and nitrogen‐rich Hf3N4 powders via ammonolysis of metal dialkylamides, i.e. Zr(NEt2)4 and Hf(NEt2)4, at temperatures below 700 °C is presented. The obtained nitrides have a rhombohedrally distorted NaCl‐type structure, which has previously been reported only for nitrogen‐rich films of these nitrides. Regardless of the atmosphere (N2 and He), the Zr3N4 starts to decompose above about ∼ 650 °C and achieves the highest decomposition rate at about 900 °C, finally yielding the mononitride ZrN. Both Zr3N4 and Hf3N4 powders are nanocrystalline with the crystal size of about 2 nm.

Journal or Publication Title: Zeitschrift für anorganische und allgemeine Chemie
Volume: 631
Number: 8
Publisher: Wiley-VCH Verlag GmbH, Weinheim
Uncontrolled Keywords: Ammonolysis, Metal dialkylamide, Zirconium(IV) nitride, Hafnium(IV) nitride, Nano‐crystals
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 17 Dec 2018 12:19
DOI: 10.1002/zaac.200400539
Official URL: https://doi.org/10.1002/zaac.200400539
Additional Information:

Dedicated to Professor Gerd Becker on the Occasion of his 65th Birthday

Funders: J.L. thanks the Alexander von Humboldt Foundation, Germany for granting a research fellowship., A.Z. is grateful to the Deutsche Forschungsgemeinschaft for the financial support.
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