A novel solid-state reaction was investigated to achieve nanosized ZrB2 particles using ZrO2 and NaBH4 as starting materials, which were dry mixed and thermally treated at increasing temperatures and B:Zr molar ratio to get a complete oxide to boride conversion. X-ray diffraction analysis showed that the reaction was completed after 30 min at 900 degrees C. Field-emission scanning microscopy revealed ZrB2 particles with dimensions around 100 nm. In this paper for the first time we propose the oxide-borohydride system as an alternative to synthesize metal borides to chemical and borothermic reactions. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Synthesis of nanosized zirconium diboride powder via oxide-borohydride solid-state reaction
Zoli Luca;Costa Anna Luisa;Sciti Diletta
2015
Abstract
A novel solid-state reaction was investigated to achieve nanosized ZrB2 particles using ZrO2 and NaBH4 as starting materials, which were dry mixed and thermally treated at increasing temperatures and B:Zr molar ratio to get a complete oxide to boride conversion. X-ray diffraction analysis showed that the reaction was completed after 30 min at 900 degrees C. Field-emission scanning microscopy revealed ZrB2 particles with dimensions around 100 nm. In this paper for the first time we propose the oxide-borohydride system as an alternative to synthesize metal borides to chemical and borothermic reactions. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
