Preparation of nano-ZrB2 powder by Ca liquid assisted boronation reaction between ZrC and B4C
Source abstract
Abstract
Nano-Zirconium diboride (ZrB2) powder was vital raw material for manufacturing ultra-high temperature ceramics (UHTCs) and C/C composite materials, which were widely used in extreme environment. In this paper, a convenient way of synthesizing nano-ZrB2 powder was proposed. Firstly, the precursor consisting of ultrafine-ZrC and C was obtained via vacuum carbothermal reduction of nano-ZrO2. And then, the carbothermal reduction product was boronized by B4C in Ca melt. In boronation process, Ca melt would play a key role as decarburizer. By boronation reaction at 1373 K and 1473 K, cauliflower-shaped ZrB2 particle and smooth polyhedral ZrB2 particle were obtained, respectively. XRD and BET analyses showed that the grain sizes and BET-equivalent particle diameters of these two products were less than 100 nm.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Boron and Carbon Nanomaterials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (27)
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