Preparation, characterization and combustion properties of Zr/ZrH2 particles coated with α-FeOOH crystal grains--颗粒学报PARTICUOLOGY

Lv, B., Xu, Y., Hou, B., Wu, D., & Sun, Y. (2009). Preparation, characterization and combustion properties of Zr/ZrH2 particles coated with α-FeOOH crystal grains. Particuology, 7(3), 169–174. https://doi.org/10.1016/j.partic.2008.11.011

Preparation, characterization and combustion properties of Zr/ZrH₂ particles coated with α-FeOOH crystal grains

Baoliang Lv ^{a b}, Yao Xu ^a *, Bo Hou ^a, Dong Wu ^a, Yuhan Sun ^a

a State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
b Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

10.1016/j.partic.2008.11.011

Volume 7, Issue 3, June 2009, Pages 169-174

Received 20 August 2008, Accepted 16 November 2008, Available online 22 April 2009.

E-mail: xuyao@sxicc.ac.cn

Highlights

Abstract

Zr/ZrH₂ particles with irregular morphologies and broad size distribution were uniformly coated with acicular α-FeOOH crystal grains via a facile route without using polymers or surfactants. The as-synthesized material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), UV–vis diffusion reflection (UV–vis) and Raman spectrometry. Based on these characterizations, the synthesis mechanism was explained in terms of combined heterogeneous nucleation and solid state transformation reaction. The presence of α-FeOOH coating greatly changed the combustion behavior of Zr/ZrH₂ particles: the combustion lasting time decreased from 32 s for un-coated Zr/ZrH₂ particles to 0.2 s for coated particles while the maximum temperature in the combustion process increased from 1510 °C to 2036 °C.

Graphical abstract

Keywords

Composite materials; Coating; Zr/ZrH₂; α-FeOOH; Solid state transformation; Combustion

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